{"title":"Koch Cure Clean High-Temperature Filters | Paint Ovens \u0026 Process Heat","description":"\u003cp\u003eKoch \u003cstrong\u003eCure Clean\u003c\/strong\u003e is the high-temperature filtration line engineered for paint-cure ovens, industrial process heat, and any HVAC application where standard polyurethane-bonded media can't survive operating temperatures. \u003cstrong\u003eMulti-Pleat HT\u003c\/strong\u003e for prefilter and standard-pleated applications up to 250°F continuous. \u003cstrong\u003eMulti-Cell HT\u003c\/strong\u003e for rigid box AHU final-stage filtration up to 350°F continuous. \u003cstrong\u003eUniversal Cube HE and HC\u003c\/strong\u003e for cube-style oven exhaust filtration. Specified to equipment temperature, dwell time, and media compatibility — not interchangeable with standard catalog filters even where dimensions match. Quote-based: contact us with operating temperature, equipment type, and existing filter spec.\u003c\/p\u003e","products":[{"product_id":"24x24x4-koch-micromax-metal-merv-14-120-730-001","title":"24x24x4 Koch MicroMAX Galvanized Metal Frame MERV 14 120-730-001 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e24″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-730-001) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118778839162,"sku":"120-730-001","price":677.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_418f1501-c44c-4d98-b520-20e4836355ba.png?v=1777659356"},{"product_id":"20x25x4-koch-micromax-metal-merv-14-120-730-002","title":"20x25x4 Koch MicroMAX Galvanized Metal Frame MERV 14 120-730-002 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-730-002) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118778970234,"sku":"120-730-002","price":748.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_1d90b4b5-a168-468b-8241-bf8169ee6e14.png?v=1777659369"},{"product_id":"20x24x4-koch-micromax-metal-merv-14-120-730-003","title":"20x24x4 Koch MicroMAX Galvanized Metal Frame MERV 14 120-730-003 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-730-003) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118779068538,"sku":"120-730-003","price":756.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_70ff406d-1531-40f1-8826-985e0c4ab223.png?v=1777659383"},{"product_id":"20x20x4-koch-micromax-metal-merv-14-120-730-004","title":"20x20x4 Koch MicroMAX Galvanized Metal Frame MERV 14 120-730-004 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-730-004) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118779199610,"sku":"120-730-004","price":626.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_376eec6d-11d5-43a7-ba46-928015b64583.png?v=1777659399"},{"product_id":"18x24x4-koch-micromax-metal-merv-14-120-730-005","title":"18x24x4 Koch MicroMAX Galvanized Metal Frame MERV 14 120-730-005 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e18″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-730-005) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118779265146,"sku":"120-730-005","price":626.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_953c1442-48fd-4278-bf78-8036a1483e43.png?v=1777659417"},{"product_id":"16x25x4-koch-micromax-metal-merv-14-120-730-006","title":"16x25x4 Koch MicroMAX Galvanized Metal Frame MERV 14 120-730-006 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-730-006) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118779363450,"sku":"120-730-006","price":699.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_9b866edf-cddc-44fc-be8a-9d81975efe4f.png?v=1777659435"},{"product_id":"16x20x4-koch-micromax-metal-merv-14-120-730-007","title":"16x20x4 Koch MicroMAX Galvanized Metal Frame MERV 14 120-730-007 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-730-007) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118779592826,"sku":"120-730-007","price":610.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_4acfcc75-d681-4b92-a2f8-912987b711cc.png?v=1777659450"},{"product_id":"12x24x4-koch-micromax-metal-merv-14-120-730-008","title":"12x24x4 Koch MicroMAX Galvanized Metal Frame MERV 14 120-730-008 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e12″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-730-008) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 6 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118779658362,"sku":"120-730-008","price":1015.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_f6db0f8b-a0fb-44b6-8327-48a87cdfbd7b.png?v=1777659468"},{"product_id":"24x24x4-koch-micromax-metal-merv-13-120-731-001","title":"24x24x4 Koch MicroMAX Galvanized Metal Frame MERV 13 120-731-001 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e24″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-731-001) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118779756666,"sku":"120-731-001","price":670.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_8272f7fd-12dc-41d9-a6f5-07628c8f50d8.png?v=1777659481"},{"product_id":"20x25x4-koch-micromax-metal-merv-13-120-731-002","title":"20x25x4 Koch MicroMAX Galvanized Metal Frame MERV 13 120-731-002 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-731-002) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118779953274,"sku":"120-731-002","price":710.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_3a26241a-607d-41e8-96b0-e5418325b4bc.png?v=1777659494"},{"product_id":"20x24x4-koch-micromax-metal-merv-13-120-731-003","title":"20x24x4 Koch MicroMAX Galvanized Metal Frame MERV 13 120-731-003 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-731-003) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118780084346,"sku":"120-731-003","price":670.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_b92ce03a-0b6b-4788-922b-d4d0b93e3a67.png?v=1777659510"},{"product_id":"20x20x4-koch-micromax-metal-merv-13-120-731-004","title":"20x20x4 Koch MicroMAX Galvanized Metal Frame MERV 13 120-731-004 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-731-004) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118780248186,"sku":"120-731-004","price":624.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_673fe773-99fe-471c-bdff-fbb2d88c1c9e.png?v=1777659528"},{"product_id":"18x24x4-koch-micromax-metal-merv-13-120-731-005","title":"18x24x4 Koch MicroMAX Galvanized Metal Frame MERV 13 120-731-005 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e18″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-731-005) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118780346490,"sku":"120-731-005","price":624.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_2388dbb0-e2dc-4297-90b4-689d51c053a2.png?v=1777659542"},{"product_id":"16x25x4-koch-micromax-metal-merv-13-120-731-006","title":"16x25x4 Koch MicroMAX Galvanized Metal Frame MERV 13 120-731-006 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-731-006) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118780477562,"sku":"120-731-006","price":697.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_c181c7c0-8fb0-4faa-8ec0-44ffe2dcddd2.png?v=1777659555"},{"product_id":"16x20x4-koch-micromax-metal-merv-13-120-731-007","title":"16x20x4 Koch MicroMAX Galvanized Metal Frame MERV 13 120-731-007 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-731-007) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118780543098,"sku":"120-731-007","price":608.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_277a0e4c-ce88-4d07-9682-7ef82339f103.png?v=1777659566"},{"product_id":"12x24x4-koch-micromax-metal-merv-13-120-731-008","title":"12x24x4 Koch MicroMAX Galvanized Metal Frame MERV 13 120-731-008 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e12″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-731-008) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 6 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118780674170,"sku":"120-731-008","price":1006.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_15d0ebb6-9c90-4d26-9a52-e497eaa18f93.png?v=1777659577"},{"product_id":"24x24x4-koch-micromax-metal-merv-11-120-732-001","title":"24x24x4 Koch MicroMAX Galvanized Metal Frame MERV 11 120-732-001 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e24″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-732-001) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118780805242,"sku":"120-732-001","price":632.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_7737a332-2e87-470a-aeb4-dff42af6fdab.png?v=1777659589"},{"product_id":"20x25x4-koch-micromax-metal-merv-11-120-732-002","title":"20x25x4 Koch MicroMAX Galvanized Metal Frame MERV 11 120-732-002 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-732-002) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118780936314,"sku":"120-732-002","price":670.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_93b4de12-3720-4b19-85d4-5cdcceb7246c.png?v=1777659601"},{"product_id":"20x24x4-koch-micromax-metal-merv-11-120-732-003","title":"20x24x4 Koch MicroMAX Galvanized Metal Frame MERV 11 120-732-003 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-732-003) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118781001850,"sku":"120-732-003","price":650.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_b46590c3-20c4-4973-a0dd-d3035cea650e.png?v=1777659612"},{"product_id":"20x20x4-koch-micromax-metal-merv-11-120-732-004","title":"20x20x4 Koch MicroMAX Galvanized Metal Frame MERV 11 120-732-004 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-732-004) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118781132922,"sku":"120-732-004","price":588.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_7b2b1741-15d3-4c20-8777-be876e1de255.png?v=1777659627"},{"product_id":"18x24x4-koch-micromax-metal-merv-11-120-732-005","title":"18x24x4 Koch MicroMAX Galvanized Metal Frame MERV 11 120-732-005 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e18″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-732-005) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118781198458,"sku":"120-732-005","price":509.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_9d86cb7f-5262-44fb-a0c9-e38f4b087e70.png?v=1777659638"},{"product_id":"16x25x4-koch-micromax-metal-merv-11-120-732-006","title":"16x25x4 Koch MicroMAX Galvanized Metal Frame MERV 11 120-732-006 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-732-006) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118781263994,"sku":"120-732-006","price":657.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_8c4e2e63-c02a-4135-8054-5ce3eb87b16c.png?v=1777659647"},{"product_id":"16x20x4-koch-micromax-metal-merv-11-120-732-007","title":"16x20x4 Koch MicroMAX Galvanized Metal Frame MERV 11 120-732-007 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-732-007) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118781362298,"sku":"120-732-007","price":572.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_a59aae90-716e-4795-af86-68388100f40a.png?v=1777659656"},{"product_id":"12x24x4-koch-micromax-metal-merv-11-120-732-008","title":"12x24x4 Koch MicroMAX Galvanized Metal Frame MERV 11 120-732-008 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e12″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-732-008) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame (NHM)\u003c\/strong\u003e rated for operation up to \u003cstrong\u003e200°F \/ 93°C\u003c\/strong\u003e — the higher-temperature, heavy-duty option in the MicroMAX line.\u003c\/p\u003e\u003cp\u003eThe MicroMAX packs \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media into a \u003cstrong\u003e4″ depth\u003c\/strong\u003e at just \u003cstrong\u003e7 lbs\u003c\/strong\u003e each — comparable media area to filters three times the depth and weight. The dual-density media construction (coarse fibers upstream, fine fibers downstream) maintains high dust holding capacity and extends filter life, while the water-repellent binder handles humidity without media degradation.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — commercial air handlers and AHU housings sized for shallower depth filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity systems\u003c\/strong\u003e — operates up to 125% of rated face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage- and weight-conscious facilities\u003c\/strong\u003e — 3-per-carton packaging and 7-lb filter weight reduce shipping and handling cost vs deeper alternatives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized Metal (NHM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable; pleats can be installed in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 6 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eBeverage board vs. galvanized metal frame\u003c\/h3\u003e\u003cp\u003eThe MicroMAX comes in two frame configurations. The \u003cstrong\u003ebeverage board frame\u003c\/strong\u003e is high-density paperboard — lightweight, cost-effective, and rated to 150°F. The \u003cstrong\u003egalvanized metal (NHM) frame\u003c\/strong\u003e handles temperatures up to 200°F and stands up to demanding industrial environments where a paperboard frame would degrade. Choose beverage board for standard commercial HVAC; choose metal when the application sees elevated temperatures, aggressive handling, or extended exposure to humidity.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch minipleat filters in the same nominal size. The compact form factor and lightweight construction make it easier to handle and store than 12″-deep alternatives with comparable media area.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118781493370,"sku":"120-732-008","price":985.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_2c250921-46c6-4de1-8f2d-1b8a457cfef6.png?v=1777659664"},{"product_id":"24x24x4-koch-micromax-fm-single-header-merv-14-120-720-001","title":"24x24x4 Koch MicroMAX FM Single Header MERV 14 120-720-001 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e24″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-720-001) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118781689978,"sku":"120-720-001","price":710.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_55cb3f1e-cbaa-4c22-a687-600791a85ff9.png?v=1777659704"},{"product_id":"20x24x4-koch-micromax-fm-single-header-merv-14-120-720-002","title":"20x24x4 Koch MicroMAX FM Single Header MERV 14 120-720-002 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-720-002) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118781722746,"sku":"120-720-002","price":841.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_40f74b2e-84e3-4ce9-b474-24a50cfdd7c6.png?v=1777659711"},{"product_id":"20x25x4-koch-micromax-fm-single-header-merv-14-120-720-003","title":"20x25x4 Koch MicroMAX FM Single Header MERV 14 120-720-003 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-720-003) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118781755514,"sku":"120-720-003","price":889.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_70a02e60-ff95-4dd0-b2ca-a1a274541fa4.png?v=1777659717"},{"product_id":"20x20x4-koch-micromax-fm-single-header-merv-14-120-720-004","title":"20x20x4 Koch MicroMAX FM Single Header MERV 14 120-720-004 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-720-004) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118781788282,"sku":"120-720-004","price":836.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_236c00a5-ec2e-4689-99f3-e68eb975686b.png?v=1777659723"},{"product_id":"18x24x4-koch-micromax-fm-single-header-merv-14-120-720-005","title":"18x24x4 Koch MicroMAX FM Single Header MERV 14 120-720-005 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e18″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-720-005) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118782673018,"sku":"120-720-005","price":837.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_42525732-6d45-4507-9ba8-788bfd74be0f.png?v=1777659730"},{"product_id":"16x25x4-koch-micromax-fm-single-header-merv-14-120-720-006","title":"16x25x4 Koch MicroMAX FM Single Header MERV 14 120-720-006 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-720-006) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118782705786,"sku":"120-720-006","price":823.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_7a5f6c57-4c61-4617-aa1e-deae44408de0.png?v=1777659737"},{"product_id":"16x20x4-koch-micromax-fm-single-header-merv-14-120-720-007","title":"16x20x4 Koch MicroMAX FM Single Header MERV 14 120-720-007 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-720-007) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118782869626,"sku":"120-720-007","price":728.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_2fb7364c-d67f-4c5e-b95c-c6bdd9eb3bac.png?v=1777659743"},{"product_id":"12x24x4-koch-micromax-fm-single-header-merv-14-120-720-008","title":"12x24x4 Koch MicroMAX FM Single Header MERV 14 120-720-008 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e12″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-720-008) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 6 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing most sub-micron particles including smoke, bacteria, and many viruses. Specified in hospitals, surgical suites, pharmaceutical, and demanding cleanroom pre-filter applications.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118782935162,"sku":"120-720-008","price":1266.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_36d4ab26-9d51-4e43-8120-b8c8a0eeea91.png?v=1777659747"},{"product_id":"24x24x4-koch-micromax-fm-single-header-merv-13-120-721-001","title":"24x24x4 Koch MicroMAX FM Single Header MERV 13 120-721-001 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e24″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-721-001) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783000698,"sku":"120-721-001","price":707.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_e2ed98e5-ef9f-4138-8d1f-050552b9f2c1.png?v=1777659753"},{"product_id":"20x24x4-koch-micromax-fm-single-header-merv-13-120-721-002","title":"20x24x4 Koch MicroMAX FM Single Header MERV 13 120-721-002 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-721-002) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783066234,"sku":"120-721-002","price":814.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_c8dc58f7-fc8f-440b-8a04-1b057a0c1cc6.png?v=1777659757"},{"product_id":"20x25x4-koch-micromax-fm-single-header-merv-13-120-721-003","title":"20x25x4 Koch MicroMAX FM Single Header MERV 13 120-721-003 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-721-003) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783164538,"sku":"120-721-003","price":827.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_bf18248d-f643-4421-a438-04493c18d03f.png?v=1777659763"},{"product_id":"20x20x4-koch-micromax-fm-single-header-merv-13-120-721-004","title":"20x20x4 Koch MicroMAX FM Single Header MERV 13 120-721-004 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-721-004) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783197306,"sku":"120-721-004","price":834.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_ccf6504a-c4b4-4ac2-ae2f-967c212f142f.png?v=1777659767"},{"product_id":"18x24x4-koch-micromax-fm-single-header-merv-13-120-721-005","title":"18x24x4 Koch MicroMAX FM Single Header MERV 13 120-721-005 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e18″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-721-005) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783230074,"sku":"120-721-005","price":843.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_970ff74d-7650-45e5-b0ef-98656025748d.png?v=1777659773"},{"product_id":"16x25x4-koch-micromax-fm-single-header-merv-13-120-721-006","title":"16x25x4 Koch MicroMAX FM Single Header MERV 13 120-721-006 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-721-006) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783262842,"sku":"120-721-006","price":820.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_935ad2a2-b298-4d6e-9738-6a5c0bbb7463.png?v=1777659777"},{"product_id":"16x20x4-koch-micromax-fm-single-header-merv-13-120-721-007","title":"16x20x4 Koch MicroMAX FM Single Header MERV 13 120-721-007 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-721-007) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783328378,"sku":"120-721-007","price":715.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_8c2bd397-cdf0-498c-b4bf-42c3f32786e9.png?v=1777659784"},{"product_id":"12x24x4-koch-micromax-fm-single-header-merv-13-120-721-008","title":"12x24x4 Koch MicroMAX FM Single Header MERV 13 120-721-008 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e12″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-721-008) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 6 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and most respiratory droplets. Specified in healthcare, clinics, labs, and high-IAQ commercial spaces.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783393914,"sku":"120-721-008","price":1266.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_e705d47e-13bb-40af-b23a-dc91cf2dfd7f.png?v=1777659789"},{"product_id":"24x24x4-koch-micromax-fm-single-header-merv-11-120-722-001","title":"24x24x4 Koch MicroMAX FM Single Header MERV 11 120-722-001 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e24″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-722-001) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783459450,"sku":"120-722-001","price":665.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_3be50d7c-f074-45e2-b3ba-add572ee1673.png?v=1777659796"},{"product_id":"20x24x4-koch-micromax-fm-single-header-merv-11-120-722-002","title":"20x24x4 Koch MicroMAX FM Single Header MERV 11 120-722-002 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-722-002) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783492218,"sku":"120-722-002","price":809.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_8e7ac383-6d3a-40ac-a561-3c4aef305282.png?v=1777659803"},{"product_id":"20x25x4-koch-micromax-fm-single-header-merv-11-120-722-003","title":"20x25x4 Koch MicroMAX FM Single Header MERV 11 120-722-003 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-722-003) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783524986,"sku":"120-722-003","price":864.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_5e465e9b-9bcc-43ba-a65a-37be1711c7e0.png?v=1777659810"},{"product_id":"20x20x4-koch-micromax-fm-single-header-merv-11-120-722-004","title":"20x20x4 Koch MicroMAX FM Single Header MERV 11 120-722-004 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-722-004) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783557754,"sku":"120-722-004","price":803.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_7cb63a99-3379-449c-9764-b7c3b75d146f.png?v=1777659815"},{"product_id":"18x24x4-koch-micromax-fm-single-header-merv-11-120-722-005","title":"18x24x4 Koch MicroMAX FM Single Header MERV 11 120-722-005 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e18″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-722-005) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783590522,"sku":"120-722-005","price":831.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_ee1e4639-61cf-42c8-a99f-c03059488d1c.png?v=1777659819"},{"product_id":"16x25x4-koch-micromax-fm-single-header-merv-11-120-722-006","title":"16x25x4 Koch MicroMAX FM Single Header MERV 11 120-722-006 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 25″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-722-006) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783656058,"sku":"120-722-006","price":796.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_fa9e1a9d-1ba3-4572-a94f-3f72d90db5fe.png?v=1777659825"},{"product_id":"16x20x4-koch-micromax-fm-single-header-merv-11-120-722-007","title":"16x20x4 Koch MicroMAX FM Single Header MERV 11 120-722-007 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 20″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-722-007) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 3 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783852666,"sku":"120-722-007","price":712.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_3d607b2c-c056-4574-a3ba-c7ff32938d88.png?v=1777659832"},{"product_id":"12x24x4-koch-micromax-fm-single-header-merv-11-120-722-008","title":"12x24x4 Koch MicroMAX FM Single Header MERV 11 120-722-008 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e12″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX FM\u003c\/strong\u003e filter (part number 120-722-008) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003egalvanized metal frame and single metal header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe FM (Single Header) configuration is built specifically for commercial air handlers where filters slide in from the side rather than the front. The header rail guides the filter into the housing track and seals against the housing gasket on installation. Otherwise, this is the same MicroMAX construction trusted in commercial HVAC: \u003cstrong\u003e120 sq ft\u003c\/strong\u003e of micro fiberglass media in a \u003cstrong\u003e4″ depth\u003c\/strong\u003e, with the dual-density media (coarse upstream, fine downstream) and water-repellent binder that hold up under variable airflow and humidity.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX FM is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the metal header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher-temperature applications\u003c\/strong\u003e — galvanized metal frame handles up to 200°F \/ 93°C, well above the 150°F limit of beverage board frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction maintains performance under airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals, pharmaceutical, and lab facilities\u003c\/strong\u003e — proven media reliability in critical IAQ environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — metal frame and header survive rough changeouts in tight or hard-to-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-filter for HEPA stages\u003c\/strong\u003e — common upstream filtration ahead of cleanroom or critical-environment HEPA filters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Micro fiberglass paper, dual-density (coarse upstream, fine downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder:\u003c\/strong\u003e Water-repellent formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Galvanized metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single metal header (FM) — for side-access housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat with bonded die-cut supports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia area:\u003c\/strong\u003e 120 sq ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2007\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating temperature:\u003c\/strong\u003e 200°F \/ 93°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum face velocity:\u003c\/strong\u003e 125% of rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified Class 2 per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 6 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\u003cp\u003eCaptures fine dust, smoke, auto fumes, and most airborne particles down to 1 micron. A strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eFM (Single Header) vs. headerless MicroMAX\u003c\/h3\u003e\u003cp\u003eIf your housing accepts standard front-loaded filters, the headerless MicroMAX (with either beverage board or galvanized metal frame) is typically the right choice. Choose the \u003cstrong\u003eFM Single Header\u003c\/strong\u003e when your air handler is built for side-loaded filters and requires the metal header for installation and sealing. Replacing an existing FM filter? Match it with the FM variant; the headerless options will not seat correctly in side-access housings.\u003c\/p\u003e\u003ch3\u003eUse with a prefilter for maximum performance\u003c\/h3\u003e\u003cp\u003ePer Koch’s recommendation, MicroMAX filters perform best when paired with an upstream prefilter that captures coarse debris before it reaches the high-MERV minipleat media. This extends MicroMAX service life and lowers total cost of ownership in dust-loaded environments.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX FM is interchangeable with most competitive single-header 4″-deep minipleat filters in the same nominal size. Width and height dimensions are interchangeable on the underlying media pack — the metal header determines the sealing edge orientation.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118783885434,"sku":"120-722-008","price":1127.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_dd91b197-aca4-4749-b0c0-936066e3e7f9.png?v=1777659839"},{"product_id":"12x24x1-koch-multi-pleat-ht-merv-8-102-730-001","title":"12x24x1 Koch Multi-Pleat HT High Temperature MERV 8 102-730-001 (12 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e12″ × 24″ × 1″\u003c\/strong\u003e \u003cstrong\u003eKoch Multi-Pleat HT\u003c\/strong\u003e filter (part number 102-730-001) is a \u003cstrong\u003especialty high-temperature pleated panel filter\u003c\/strong\u003e with \u003cstrong\u003eMERV 8\u003c\/strong\u003e efficiency, engineered for systems with continuous operational temperatures up to \u003cstrong\u003e500°F \/ 260°C\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe Multi-Pleat HT is purpose-built for industrial applications where standard synthetic-media pleated filters (Elite, XL8, GT) would degrade or fail. The frame is \u003cstrong\u003e24-gauge aluminized steel\u003c\/strong\u003e that resists flaking and oxidation under sustained heat. The media is \u003cstrong\u003especially formulated extended-surface glass microfiber\u003c\/strong\u003e, designed to maintain MERV 8 performance at temperatures that would melt or break down conventional synthetic media. Pleats are bonded to the entire interior surface of the frame to eliminate bypass, the radial pleat design ensures total media utilization, and the media is supported downstream by a \u003cstrong\u003ehigh-temperature expanded metal grid\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe filter is also \u003cstrong\u003eUL Class 1\u003c\/strong\u003e classified — a higher fire-rating classification than the UL Class 2 used in standard Koch pleated panels, important for spray booth, oven, and other applications where elevated temperatures and combustible materials may be present.\u003c\/p\u003e\u003ch3\u003eWhen Multi-Pleat HT is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrying ovens\u003c\/strong\u003e — continuous makeup air or recirculation filtration where temperatures stay elevated for long operational cycles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaking systems\u003c\/strong\u003e — industrial food production, ceramic and pottery firing, and other process-heat applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePaint spray booth makeup air\u003c\/strong\u003e — UL Class 1 rating and high-temperature media survive booth thermal cycles where standard pleated panels cannot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial process exhaust pre-filtration\u003c\/strong\u003e — ahead of higher-efficiency stages in heated process streams\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCuring ovens and tunnels\u003c\/strong\u003e — powder coating, adhesive curing, and similar applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAny system where continuous operating temperature exceeds 200°F\u003c\/strong\u003e — the practical upper limit for synthetic-media pleated filters like the Elite, XL8, and GT lines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Heavy-duty extended-surface glass microfiber (specifically formulated for high-temperature stability)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e 24-gauge aluminized steel (resists flaking and oxidation at sustained elevated temperatures)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat-to-frame seal:\u003c\/strong\u003e Media bonded to the entire interior surface of the frame (eliminates air bypass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat geometry:\u003c\/strong\u003e Radial pleat design for total media utilization\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport:\u003c\/strong\u003e High-temperature expanded metal grid (downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface pleated panel, 1″ depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 8 per ASHRAE Test Standard 52.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum continuous operating temperature:\u003c\/strong\u003e 500°F \/ 260°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial resistance:\u003c\/strong\u003e Approximately 0.5″ w.g. at typical face velocities\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900, UL Class 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 12 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 8 captures\u003c\/h3\u003e\u003cp\u003eCaptures dust mite debris, pollen, mold spores, pet dander, and most household and office airborne dust. The standard residential and commercial efficiency for everyday indoor air quality, balancing capture performance with airflow.\u003c\/p\u003e\u003ch3\u003eWhy microfiberglass instead of synthetic media\u003c\/h3\u003e\u003cp\u003eSynthetic media (used in the Multi-Pleat Elite, XL8, GT, and GT-HD lines) is the right choice for standard HVAC up to roughly 200°F. Above that temperature, the polymer fibers begin to soften, melt, or release, compromising filter integrity and creating potential downstream contamination. Glass microfiber media has none of those failure modes — it stays structurally intact at 500°F continuous operation. The trade-off is cost (microfiberglass costs more to produce than synthetic) and slightly higher pressure drop, which is why Koch reserves the HT line for genuinely high-temperature applications and recommends synthetic-media filters everywhere else.\u003c\/p\u003e\u003ch3\u003eMulti-Pleat HT vs. Multi-Pleat Elite\/XL8\/GT: temperature ratings compared\u003c\/h3\u003e\u003cp\u003eAll Koch Multi-Pleat panel filters carry MERV 8 ratings, but their continuous-temperature tolerances differ dramatically:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Pleat Elite, XL8, GT:\u003c\/strong\u003e Synthetic media, beverage board frame — rated to roughly 200°F continuous (the standard for general HVAC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Pleat HT (this filter):\u003c\/strong\u003e Glass microfiber media, aluminized steel frame — rated to \u003cstrong\u003e500°F continuous\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf your application stays below 200°F at all times, the synthetic-media filters are a better economic choice. If continuous operating temperature is at or above 250°F, or if intermittent excursions reach 350°F+, the HT is the correct selection.\u003c\/p\u003e\u003ch3\u003eImportant sizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes listed are nominal.\u003c\/strong\u003e Actual filter dimensions are documented in Koch bulletin PB-594.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial sizes are available.\u003c\/strong\u003e Unlike most Koch pleated panel lines, the Multi-Pleat HT can be built in special sizes for OEM oven and booth specifications. \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e if you need a non-standard size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, Multi-Pleat HT ships in full carton quantities for safe transit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe Multi-Pleat HT drops into standard 1″-deep pleated panel filter slots and is interchangeable with most competitive high-temperature MERV 8 pleated panels in the same nominal size. It is the direct upgrade path for facilities currently running discontinued or competing high-temp filters in oven, booth, or process-heat applications.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118793224314,"sku":"102-730-001","price":447.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_d8886f18-e4ef-48d4-8609-d1ef557c5817.png?v=1777663548"},{"product_id":"16x20x1-koch-multi-pleat-ht-merv-8-102-730-002","title":"16x20x1 Koch Multi-Pleat HT High Temperature MERV 8 102-730-002 (12 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e16″ × 20″ × 1″\u003c\/strong\u003e \u003cstrong\u003eKoch Multi-Pleat HT\u003c\/strong\u003e filter (part number 102-730-002) is a \u003cstrong\u003especialty high-temperature pleated panel filter\u003c\/strong\u003e with \u003cstrong\u003eMERV 8\u003c\/strong\u003e efficiency, engineered for systems with continuous operational temperatures up to \u003cstrong\u003e500°F \/ 260°C\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe Multi-Pleat HT is purpose-built for industrial applications where standard synthetic-media pleated filters (Elite, XL8, GT) would degrade or fail. The frame is \u003cstrong\u003e24-gauge aluminized steel\u003c\/strong\u003e that resists flaking and oxidation under sustained heat. The media is \u003cstrong\u003especially formulated extended-surface glass microfiber\u003c\/strong\u003e, designed to maintain MERV 8 performance at temperatures that would melt or break down conventional synthetic media. Pleats are bonded to the entire interior surface of the frame to eliminate bypass, the radial pleat design ensures total media utilization, and the media is supported downstream by a \u003cstrong\u003ehigh-temperature expanded metal grid\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe filter is also \u003cstrong\u003eUL Class 1\u003c\/strong\u003e classified — a higher fire-rating classification than the UL Class 2 used in standard Koch pleated panels, important for spray booth, oven, and other applications where elevated temperatures and combustible materials may be present.\u003c\/p\u003e\u003ch3\u003eWhen Multi-Pleat HT is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrying ovens\u003c\/strong\u003e — continuous makeup air or recirculation filtration where temperatures stay elevated for long operational cycles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaking systems\u003c\/strong\u003e — industrial food production, ceramic and pottery firing, and other process-heat applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePaint spray booth makeup air\u003c\/strong\u003e — UL Class 1 rating and high-temperature media survive booth thermal cycles where standard pleated panels cannot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial process exhaust pre-filtration\u003c\/strong\u003e — ahead of higher-efficiency stages in heated process streams\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCuring ovens and tunnels\u003c\/strong\u003e — powder coating, adhesive curing, and similar applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAny system where continuous operating temperature exceeds 200°F\u003c\/strong\u003e — the practical upper limit for synthetic-media pleated filters like the Elite, XL8, and GT lines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Heavy-duty extended-surface glass microfiber (specifically formulated for high-temperature stability)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e 24-gauge aluminized steel (resists flaking and oxidation at sustained elevated temperatures)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat-to-frame seal:\u003c\/strong\u003e Media bonded to the entire interior surface of the frame (eliminates air bypass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat geometry:\u003c\/strong\u003e Radial pleat design for total media utilization\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport:\u003c\/strong\u003e High-temperature expanded metal grid (downstream)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface pleated panel, 1″ depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 8 per ASHRAE Test Standard 52.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum continuous operating temperature:\u003c\/strong\u003e 500°F \/ 260°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial resistance:\u003c\/strong\u003e Approximately 0.5″ w.g. at typical face velocities\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900, UL Class 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 12 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 8 captures\u003c\/h3\u003e\u003cp\u003eCaptures dust mite debris, pollen, mold spores, pet dander, and most household and office airborne dust. The standard residential and commercial efficiency for everyday indoor air quality, balancing capture performance with airflow.\u003c\/p\u003e\u003ch3\u003eWhy microfiberglass instead of synthetic media\u003c\/h3\u003e\u003cp\u003eSynthetic media (used in the Multi-Pleat Elite, XL8, GT, and GT-HD lines) is the right choice for standard HVAC up to roughly 200°F. Above that temperature, the polymer fibers begin to soften, melt, or release, compromising filter integrity and creating potential downstream contamination. Glass microfiber media has none of those failure modes — it stays structurally intact at 500°F continuous operation. The trade-off is cost (microfiberglass costs more to produce than synthetic) and slightly higher pressure drop, which is why Koch reserves the HT line for genuinely high-temperature applications and recommends synthetic-media filters everywhere else.\u003c\/p\u003e\u003ch3\u003eMulti-Pleat HT vs. Multi-Pleat Elite\/XL8\/GT: temperature ratings compared\u003c\/h3\u003e\u003cp\u003eAll Koch Multi-Pleat panel filters carry MERV 8 ratings, but their continuous-temperature tolerances differ dramatically:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Pleat Elite, XL8, GT:\u003c\/strong\u003e Synthetic media, beverage board frame — rated to roughly 200°F continuous (the standard for general HVAC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Pleat HT (this filter):\u003c\/strong\u003e Glass microfiber media, aluminized steel frame — rated to \u003cstrong\u003e500°F continuous\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf your application stays below 200°F at all times, the synthetic-media filters are a better economic choice. If continuous operating temperature is at or above 250°F, or if intermittent excursions reach 350°F+, the HT is the correct selection.\u003c\/p\u003e\u003ch3\u003eImportant sizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes listed are nominal.\u003c\/strong\u003e Actual filter dimensions are documented in Koch bulletin PB-594.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial sizes are available.\u003c\/strong\u003e Unlike most Koch pleated panel lines, the Multi-Pleat HT can be built in special sizes for OEM oven and booth specifications. \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e if you need a non-standard size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, Multi-Pleat HT ships in full carton quantities for safe transit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe Multi-Pleat HT drops into standard 1″-deep pleated panel filter slots and is interchangeable with most competitive high-temperature MERV 8 pleated panels in the same nominal size. It is the direct upgrade path for facilities currently running discontinued or competing high-temp filters in oven, booth, or process-heat applications.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118793257082,"sku":"102-730-002","price":446.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_72ec623a-a9a1-443c-9be6-b10f6871371c.png?v=1777663551"}],"url":"https:\/\/www.rememberthefilter.com\/collections\/koch-cure-clean-high-temp.oembed?page=5","provider":"RememberTheFilter.com","version":"1.0","type":"link"}