{"title":"20x24x4 HVAC Filters | Commercial \u0026 Home | Fit Guarantee","description":"\u003cdiv class=\"rtf-collection-intro\"\u003e\n\n\u003ch2\u003e20x24x4 HVAC, Furnace \u0026amp; AC Filters\u003c\/h2\u003e\n\n\u003cp\u003eReplacement 20x24x4 air filters for homes, offices, and commercial HVAC systems. This collection covers every MERV rating we stock: fiberglass MERV 1–4, pleated MERV 8, MERV 10, MERV 11, and hospital-grade MERV 13. Free shipping on orders over $50.\u003c\/p\u003e\n\n\u003cp\u003eIf your rack is labeled 20x24x4, any filter here will fit. Actual dimensions vary slightly by manufacturer—check the product page for exact specs. Need a non-standard size? Our \u003ca href=\"\/collections\/custom-filters\"\u003ecustom filters\u003c\/a\u003e cut to 1\/8″ precision.\u003c\/p\u003e\n\n\u003ch3\u003eWhich MERV Rating Should I Choose?\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 1–4 (fiberglass)\u003c\/strong\u003e — Lowest cost. Protects your blower and coil from debris but won't improve air quality. Best for rentals and monthly-change schedules.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 8 (pleated)\u003c\/strong\u003e — Residential and light-commercial standard. Captures dust, pollen, lint, and mold spores.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 10–11\u003c\/strong\u003e — Captures pet dander, finer particulate, and some bacteria. Recommended for pets, allergies, and facilities pursuing better IAQ.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 13\u003c\/strong\u003e — Hospital-grade. Captures smoke, bacteria, virus carriers, and most airborne allergens. ASHRAE and CDC recommend MERV 13 where the HVAC system can support it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eNot sure? Take our \u003ca href=\"\/pages\/merv-quiz\"\u003eMERV quiz\u003c\/a\u003e or call \u003cstrong\u003e1-866-469-8556\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eHow Often Should I Change a 20x24x4 Filter?\u003c\/h3\u003e\n\n\u003cp\u003e4″ media cabinets hold dramatically more filter media than 1″ or 2″ filters, so they run longer between changes—typically every \u003cstrong\u003e6–12 months\u003c\/strong\u003e. Fewer changes per year, less labor, and typically lower total cost of ownership. A \u003ca href=\"\/collections\/subscription-filters\"\u003e6-month or annual subscription\u003c\/a\u003e matches the natural changeout cycle.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Buy From RememberTheFilter.com\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted brands\u003c\/strong\u003e — AAF Flanders, Koch, and our own PrimeShield line, built by manufacturers we've partnered with for nearly two decades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Fit Guarantee\u003c\/strong\u003e — if it doesn't fit as expected, we'll make it right.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping over $50\u003c\/strong\u003e to the lower 48, subscription discounts up to 10%, commercial \u0026amp; bulk pricing available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e","products":[{"product_id":"20x24x4-pre-pleat-40-lpd-filters-80055-042024-6-filters","title":"20x24x4 AAF Flanders PREpleat LPD MERV 10 Standard Capacity 80055.042024 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″ Standard Capacity\u003c\/strong\u003e listing (AAF Flanders part number \u003cstrong\u003e80055.042024\u003c\/strong\u003e) of the \u003cstrong\u003eAAF Flanders PREpleat LPD\u003c\/strong\u003e pleated air filter ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e, and delivers \u003cstrong\u003eMERV 10\u003c\/strong\u003e filtration with the lowest initial resistance of any pleated filter in its class. Result: cleaner air, more runtime between changes, and less energy burned pushing air through a loaded filter.\u003c\/p\u003e\n\u003ch3\u003eWhat Standard Capacity means\u003c\/h3\u003e\n\u003cp\u003eThe SC (Standard Capacity) variant is the everyday workhorse of the PREpleat LPD line: the lowest initial resistance in its class while delivering \u003cstrong\u003eMERV 10\u003c\/strong\u003e filtration. For homes, light commercial spaces, and pre-filter duty in larger systems, SC balances filter cost, airflow, and dust-holding to keep HVAC equipment running efficiently.\u003c\/p\u003e\n\u003ch3\u003eSame filter you've ordered for years — now MERV 10\u003c\/h3\u003e\n\u003cp\u003eThe AAF Flanders PREpleat LPD was a MERV 8 filter for most of its life, and many of our repeat customers knew it by that rating. The part number hasn't changed. The frame, pleat geometry, and installation are the same. What changed is the media — AAF upgraded it to a \u003cstrong\u003eMERV 10\u003c\/strong\u003e gradient-density synthetic with no increase in pressure drop and \u003cstrong\u003eno change in price\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIn practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBetter filtration, same airflow.\u003c\/strong\u003e Captures a broader particle range than the old MERV 8 while keeping the low initial resistance LPD is known for.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSame fit, same part number.\u003c\/strong\u003e Drop it into the same housing you've always used.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSame service life.\u003c\/strong\u003e If 3 months was your rhythm, 3 months still works.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSame price point.\u003c\/strong\u003e A real filtration upgrade at no cost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat MERV 10 captures\u003c\/h3\u003e\n\u003cp\u003eFiner household dust, most pollen, mold spores, pet dander, and larger bacteria-sized particles — a practical step up for allergy-sensitive homes, wildfire-smoke regions, and light commercial spaces. Mechanical (not electrostatic) capture means performance doesn't fade as the filter loads.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic non-woven, recyclable, gradient-density. Mechanical capture — performance does not fade with age the way charged-media filters can.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePleat support:\u003c\/strong\u003e Expanded metal continuously laminated to the air-leaving side to hold pleat shape through the filter's service life.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePleat geometry:\u003c\/strong\u003e V-pleat design maximizes usable surface area and keeps pressure drop low across the loading curve.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Heavy-duty two-piece moisture-resistant board with diagonal support members and interlocking corners. Media bonded to the frame at all contact points.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 180°F (82°C).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003ePrimary filter in residential returns and light commercial HVAC, and pre-filter ahead of higher-MERV media in larger commercial air handlers. Drop-in replacement for front-access holding frames and side-access housings.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/PREpleat_LPD_M10_SC_AFP-1-380C-2.pdf?v=1725043729%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload PREpleat LPD spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-10-pleated-air-filters-12-pack\"\u003ePrimeShield Enhanced (MERV 10)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":33442596044,"sku":"80055-042024","price":288.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/4314878_A.eps_High.jpg?v=1769985445"},{"product_id":"pre-pleat-40-high-capacity-merv-8-6-filters-80255-042024","title":"20x24x4 AAF Flanders PREpleat LPD MERV 10 High Capacity 80255.042024 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″ High Capacity\u003c\/strong\u003e listing (AAF Flanders part number \u003cstrong\u003e80255.042024\u003c\/strong\u003e) of the \u003cstrong\u003eAAF Flanders PREpleat LPD\u003c\/strong\u003e pleated air filter ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e, and delivers \u003cstrong\u003eMERV 10\u003c\/strong\u003e filtration with the lowest initial resistance of any pleated filter in its class. Result: cleaner air, more runtime between changes, and less energy burned pushing air through a loaded filter.\u003c\/p\u003e\n\u003ch3\u003eWhat makes the HC (High Capacity) different?\u003c\/h3\u003e\n\u003cp\u003eThe High Capacity variant uses a denser pleat pattern than the Standard Capacity filter, giving it more media surface area in the same footprint. More surface area means more dust can load before reaching end-of-life pressure drop — so HC filters last longer in dusty environments, light commercial settings, and pre-filter applications where replacement frequency is a cost driver.\u003c\/p\u003e\n\u003ch3\u003eSame filter you've ordered for years — now MERV 10\u003c\/h3\u003e\n\u003cp\u003eThe AAF Flanders PREpleat LPD was a MERV 8 filter for most of its life, and many of our repeat customers knew it by that rating. The part number hasn't changed. The frame, pleat geometry, and installation are the same. What changed is the media — AAF upgraded it to a \u003cstrong\u003eMERV 10\u003c\/strong\u003e gradient-density synthetic with no increase in pressure drop and \u003cstrong\u003eno change in price\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIn practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBetter filtration, same airflow.\u003c\/strong\u003e Captures a broader particle range than the old MERV 8 while keeping the low initial resistance LPD is known for.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSame fit, same part number.\u003c\/strong\u003e Drop it into the same housing you've always used.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSame service life.\u003c\/strong\u003e If 3 months was your rhythm, 3 months still works.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSame price point.\u003c\/strong\u003e A real filtration upgrade at no cost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat MERV 10 captures\u003c\/h3\u003e\n\u003cp\u003eFiner household dust, most pollen, mold spores, pet dander, and larger bacteria-sized particles — a practical step up for allergy-sensitive homes, wildfire-smoke regions, and light commercial spaces. Mechanical (not electrostatic) capture means performance doesn't fade as the filter loads.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic non-woven, recyclable, gradient-density. Mechanical capture — performance does not fade with age the way charged-media filters can.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePleat support:\u003c\/strong\u003e Expanded metal continuously laminated to the air-leaving side to hold pleat shape through the filter's service life.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePleat geometry:\u003c\/strong\u003e V-pleat design maximizes usable surface area and keeps pressure drop low across the loading curve.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Heavy-duty two-piece moisture-resistant board with diagonal support members and interlocking corners. Media bonded to the frame at all contact points.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 180°F (82°C).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003ePrimary filter in residential returns and light commercial HVAC, and pre-filter ahead of higher-MERV media in larger commercial air handlers. Drop-in replacement for front-access holding frames and side-access housings.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/PrePleat_LPD_M10_HC_AFP-1-379C.pdf?v=1725053079%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload PREpleat LPD spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-10-pleated-air-filters-12-pack\"\u003ePrimeShield Enhanced (MERV 10)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":43891916472442,"sku":"80255-042024","price":261.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/80255_a13725fc-be2c-46b2-bca6-4560e185d3c6.png?v=1759358761"},{"product_id":"prepleat-activated-carbon-6-filters-81255-042024","title":"20x24x4 AAF Flanders PREpleat Activated Carbon Odor Control 81255.042024 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing of the \u003cstrong\u003eAAF Flanders PREpleat Activated Carbon Odor Control\u003c\/strong\u003e filter (part number \u003cstrong\u003e81255.042024\u003c\/strong\u003e) ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e and combines a pleated filter with an activated-carbon layer. The carbon adsorbs odor-causing gases, volatile organic compounds (VOCs), cooking smells, pet odors, and light smoke — while the pleated media captures dust and particulates at a MERV 8 efficiency rating.\u003c\/p\u003e\n\u003ch3\u003eWhen to choose an odor-control filter\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCooking odors lingering through the return-air system\u003c\/li\u003e\n  \u003cli\u003ePet odors in multi-pet households\u003c\/li\u003e\n  \u003cli\u003eSmoke infiltration (wildfire, neighboring properties, light tobacco)\u003c\/li\u003e\n  \u003cli\u003eVOC concerns after painting, new carpet, or cleaning products\u003c\/li\u003e\n  \u003cli\u003eRestaurants, spas, gyms, pet facilities, cannabis operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow activated carbon filtration works\u003c\/h3\u003e\n\u003cp\u003eActivated carbon is microporous — a single gram has a surface area roughly equivalent to a football field. Odor molecules physically adhere to that surface (adsorption). Unlike particulate capture, carbon saturates over time, so these filters should be replaced on the same 1–3 month schedule as the pleated media itself, or sooner if odor performance degrades.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCarbon media:\u003c\/strong\u003e Pleated activated-carbon-impregnated media, bonded to a standard pleated filter substrate.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Moisture-resistant beverage-board with expanded-metal media support.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParticulate rating:\u003c\/strong\u003e MERV 8 while new; efficiency increases with dust loading.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 180°F (82°C).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/PREpleat_AC_GPF-1-143.pdf?v=1724342481%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload PREpleat Carbon spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-8-pleated-air-filters-12-pack\"\u003ePrimeShield Essential (MERV 8)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":43891916144762,"sku":"81255-042024","price":384.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/PrePleat_AC_web_0fd64f03-c8d7-4979-b08b-db5a5cb6fa79.png?v=1759358817"},{"product_id":"pre-pleat-hv-6-filters-85455-042024","title":"20x24x4 AAF Flanders PrePleat HV (High Velocity) MERV 8 85455.042024 (6 Filters)","description":"\u003cp\u003eThe \u003cstrong\u003eAAF Flanders PrePleat HV (High Velocity)\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 8\u003c\/strong\u003e filtration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eMERV 8 — standard efficiency\u003c\/h3\u003e\n\u003cp\u003eMERV 8 is the baseline for good residential and light commercial filtration: effective against household dust, lint, larger pollens, and dust-mite debris — with low pressure drop so it protects airflow and coil performance. It's the right choice when system protection and clean returns are the goal, not allergen-level filtration.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e High-velocity-rated pleated media engineered for sustained air velocities above standard HVAC (up to 625 FPM).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Reinforced frame with heavy-gauge media support for high-velocity applications. Stands up to vibration and turbulence.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eGas-turbine inlet air, high-velocity commercial air handlers, and industrial applications where face velocity exceeds standard HVAC ranges.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-8-pleated-air-filters-12-pack\"\u003ePrimeShield Essential (MERV 8)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":43891915194490,"sku":"85455-042024","price":285.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/products\/flanders-aaf-pleated-filter-pre-pleat-hv-6-filters-85455-042024-21901116492.gif?v=1496908385"},{"product_id":"pre-pleat-62r-merv-11-6-filters-85655-042024m11","title":"20x24x4 AAF Flanders PREpleat M11 MERV 11 Standard Capacity 85655.042024M11 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e85655-042024M11\u003c\/strong\u003e) of the \u003cstrong\u003eAAF Flanders PREpleat M11\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in the \u003cstrong\u003eStandard Capacity\u003c\/strong\u003e configuration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe PREpleat M11 is a meaningful efficiency upgrade over standard MERV 8 filters — capturing roughly 60–65% of particles in the 1–3 micron range versus the 20–30% typical of MERV 8 — at roughly the same airflow resistance.\u003c\/p\u003e\n\u003ch3\u003eWhat Standard Capacity means\u003c\/h3\u003e\n\u003cp\u003eThe SC (Standard Capacity) configuration is the everyday workhorse of the PREpleat M11 line: MERV 11 filtration with lower initial resistance than the High Capacity variant. For most homes and light commercial spaces, SC balances filter cost, airflow, and dust-holding capacity.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\n\u003cp\u003eFine dust, pollen, pet dander, mold spores, smoke particles, and smaller allergens. MERV 11 is the standard recommendation for households with allergies, asthma, or pets, and is commonly specified for commercial office spaces where indoor air quality is a priority. Confirm your system can handle the slight increase in static pressure compared to MERV 8.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Progressive-density bi-component synthetic fibers. Mechanical capture — performance does not fade as the filter ages.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Moisture-resistant beverage-board with diagonal support members and diamond-shaped expanded-metal media support bonded to the downstream side.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 180°F (82°C)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial and residential HVAC where MERV 11 filtration is specified. Drop-in replacement for front-access holding frames and side-access housings.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/PrePleat_M11_SC.pdf?v=1639547315%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload PREpleat M11 spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-11-pleated-air-filters-12-pack\"\u003ePrimeShield Advanced (MERV 11)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":33444780044,"sku":"85655-042024M11","price":282.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/85655_08ef2e5c-ee9d-4c31-8675-a44fe1030e15.png?v=1730068630"},{"product_id":"pre-pleat-62r-merv-11-6-filters-85755-042024m11","title":"20x24x4 AAF Flanders PREpleat M11 MERV 11 High Capacity 85755.042024M11 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e85755-042024M11\u003c\/strong\u003e) of the \u003cstrong\u003eAAF Flanders PREpleat M11\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in the \u003cstrong\u003eHigh Capacity\u003c\/strong\u003e configuration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe PREpleat M11 is a meaningful efficiency upgrade over standard MERV 8 filters — capturing roughly 60–65% of particles in the 1–3 micron range versus the 20–30% typical of MERV 8 — at roughly the same airflow resistance.\u003c\/p\u003e\n\u003ch3\u003eWhat makes the HC (High Capacity) different?\u003c\/h3\u003e\n\u003cp\u003eThe High Capacity variant uses a denser pleat pattern, giving it more media surface area in the same footprint. More surface area means more dust can load before reaching end-of-life pressure drop — so HC filters last longer in dusty environments, light commercial settings, and pre-filter applications where replacement frequency is a cost driver.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\n\u003cp\u003eFine dust, pollen, pet dander, mold spores, smoke particles, and smaller allergens. MERV 11 is the standard recommendation for households with allergies, asthma, or pets, and is commonly specified for commercial office spaces where indoor air quality is a priority. Confirm your system can handle the slight increase in static pressure compared to MERV 8.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Progressive-density bi-component synthetic fibers. Mechanical capture — performance does not fade as the filter ages.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Moisture-resistant beverage-board with diagonal support members and diamond-shaped expanded-metal media support bonded to the downstream side.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 180°F (82°C)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial and residential HVAC where MERV 11 filtration is specified. Drop-in replacement for front-access holding frames and side-access housings.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/PrePleat_M11_HC_AFP-1-388B.pdf?v=1720461763%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload PREpleat M11 spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-11-pleated-air-filters-12-pack\"\u003ePrimeShield Advanced (MERV 11)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":43891914604666,"sku":"85755-042024M11","price":285.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/85755_6376bc0b-4378-4d6c-9815-ad5e255e7ce4.png?v=1759359209"},{"product_id":"20x24x4-prepleat-merv-13-extended-surface-90013-042024-6-filters","title":"20x24x4 AAF Flanders PREpleat M13 MERV 13 90013.042024 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e90013.042024\u003c\/strong\u003e) of the \u003cstrong\u003eAAF Flanders PREpleat M13\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\n\u003cp\u003eVery fine particles including smoke, bacteria-sized particles, and virus carriers attached to larger droplets, on top of everything MERV 11 captures. Commonly specified for commercial spaces with higher indoor-air-quality requirements and for homes with wildfire smoke or air-quality concerns. Ensure your HVAC system is rated for the increased static pressure.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Progressive-density bi-component synthetic fibers. Mechanical capture — performance does not fade as the filter ages.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Moisture-resistant beverage-board with diagonal support members and expanded-metal media support bonded to the downstream side.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 180°F (82°C)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office, light institutional, and residential HVAC where MERV 13 is specified — including facilities responding to wildfire smoke or higher indoor-air-quality requirements. Confirm the HVAC system is rated for the increased static pressure.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/PrePleat_M13_PDF.pdf?v=1639548528%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload PREpleat M13 spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-13-pleated-air-filters-12-pack\"\u003ePrimeShield Elite (MERV 13)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":39638918168698,"sku":"90013-042024","price":272.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/90013_3956f95e-45a8-48fa-a302-1b3feb88b08a.png?v=1730069343"},{"product_id":"20x24x4-aaf-flanders-varicel-ii-merv-14-filter-332-510-006-1-filter","title":"20x24x4 AAF Flanders VariCel II Extended Surface Mini-Pleat MERV 14 332-510-006 (4 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eAAF Flanders VariCel II Extended Surface Mini-Pleat\u003c\/strong\u003e filter (part number 332-510-006) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a rigid extended-surface construction for commercial and industrial HVAC.\u003c\/p\u003e\n\u003cp\u003eThe VariCel II uses a \u003cstrong\u003emini-pleat\u003c\/strong\u003e extended-surface design — dramatically more filter media in the same footprint, with superior dust-holding capacity in high-humidity and turbulent-airflow conditions.\u003c\/p\u003e\n\u003ch3\u003eWhen VariCel is specified\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable air volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction holds pleat geometry across the full airflow range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-humidity environments\u003c\/strong\u003e — moisture-resistant frame won't delaminate or warp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurbulent airflow\u003c\/strong\u003e — reinforced construction handles velocity variation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecialized applications\u003c\/strong\u003e — paint-booth diffusion filters, cleanroom pre-filters, cannabis cultivation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Mini-pleat extended-surface synthetic or microfiberglass (MERV-dependent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e High wet-strength two-piece die-cut construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single, double, or no-header configurations available\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\n\u003cp\u003eSub-micron particles including most smoke and bacteria-sized particles. MERV 14 is a commercial-grade filtration tier, typically used as final filter in commercial air handlers or as a high-efficiency upgrade in facilities with dedicated high-MERV systems. Standard residential HVAC equipment is rarely rated for MERV 14 static pressure.\u003c\/p\u003e\n\u003ch3\u003eNeed help with sizing or cross-reference?\u003c\/h3\u003e\n\u003cp\u003eIf you're replacing an existing filter from a different manufacturer or need help matching the spec, \u003ca href=\"\/pages\/contact-us\"\u003esend us your current part number\u003c\/a\u003e and we'll confirm the exact match.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-13-pleated-air-filters-12-pack\"\u003ePrimeShield Elite (MERV 13)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":43486504190074,"sku":"332-510-006","price":545.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/products\/VariCel_II_58047c47-0578-40ef-b427-8705e7a235e9.png?v=1759425730"},{"product_id":"20x24x4-precisioncell-iii-merv-14-89855-042024-1-filter","title":"20x24x4 AAF Flanders PrecisionCell Rigid Filter MERV 14 89855.042024 (1 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eAAF Flanders PrecisionCell\u003c\/strong\u003e rigid filter (part number 89855.042024) is an extended-media separator-type rigid filter rated \u003cstrong\u003eMERV 14\u003c\/strong\u003e, designed for commercial and industrial HVAC where medium-to-high-efficiency filtration and rigid construction are both required.\u003c\/p\u003e\n\u003ch3\u003eSeparator-type construction\u003c\/h3\u003e\n\u003cp\u003ePrecisionCell uses \u003cstrong\u003ecorrugated separators\u003c\/strong\u003e between the pleats to maintain exact pleat spacing across the full airflow range — up to 625 FPM face velocity on 12-inch-deep filters. The result: consistent airflow, consistent efficiency, and a rigid construction that holds up in VAV systems where non-rigid filters would deform.\u003c\/p\u003e\n\u003ch3\u003eAvailable configurations\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBox style\u003c\/strong\u003e for side-access housings\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle header\u003c\/strong\u003e for standard commercial frames\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDouble header\u003c\/strong\u003e for clamp-style housings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEfficiency ranges\u003c\/h3\u003e\n\u003cp\u003eAvailable in 60–65% (MERV 11), 80–85% (MERV 13), and 90–95% (MERV 14) average efficiencies per ASHRAE 52.1 dust-spot methods.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\n\u003cp\u003eSub-micron particles including most smoke and bacteria-sized particles. MERV 14 is a commercial-grade filtration tier, typically used as final filter in commercial air handlers or as a high-efficiency upgrade in facilities with dedicated high-MERV systems. Standard residential HVAC equipment is rarely rated for MERV 14 static pressure.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-13-pleated-air-filters-12-pack\"\u003ePrimeShield Elite (MERV 13)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":43701211594874,"sku":"89855-042024","price":232.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/PrecisionCell_III_web_c5221408-5c7b-40e0-8a37-de0fd27dce57.png?v=1705426864"},{"product_id":"20x24x4-koch-multi-pleat-xl8-standard-capacity-merv-8-102-700-029-6-filters","title":"20x24x4 Koch Multi-Pleat XL8 MERV 8 Standard Capacity 102-700-029 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e102-700-029\u003c\/strong\u003e) of the \u003cstrong\u003eKoch Multi-Pleat XL8\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 8\u003c\/strong\u003e filtration in the \u003cstrong\u003eStandard Capacity\u003c\/strong\u003e configuration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat Standard Capacity means\u003c\/h3\u003e\n\u003cp\u003eThe SC (Standard Capacity) configuration is the everyday workhorse of the Multi-Pleat XL8 line: MERV 8 filtration with lower initial resistance than the High Capacity variant. For most homes and light commercial spaces, SC balances filter cost, airflow, and dust-holding capacity.\u003c\/p\u003e\n\u003ch3\u003eMERV 8 — standard efficiency\u003c\/h3\u003e\n\u003cp\u003eMERV 8 is the baseline for good residential and light commercial filtration: effective against household dust, lint, larger pollens, and dust-mite debris — with low pressure drop so it protects airflow and coil performance. It's the right choice when system protection and clean returns are the goal, not allergen-level filtration.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic blended fibers, engineered for high initial efficiency and low pressure drop. Mechanical capture — performance doesn't fade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Recyclable beverage-board frame with double-wall construction for high-humidity durability. Expanded galvanized-steel grid bonded to the air-exiting side maintains pleat uniformity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C) continuous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office buildings, schools, retail, light industrial, and residential HVAC where extended-surface pleated filtration is specified. UL 900 and ULC-S111-07 certified.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/Koch_Multi-Pleat_XL8_SC_2024-3.pdf?v=1731365417%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload Multi-Pleat XL8 spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-8-pleated-air-filters-12-pack\"\u003ePrimeShield Essential (MERV 8)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":43927543119994,"sku":"102-700-029","price":222.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/koch_xl8_10d634f1-dc29-4e2d-9810-6ea3a95b4ed6.png?v=1738026935"},{"product_id":"20x24x4-koch-multi-pleat-xl8-merv-8-high-capacity-102-701-029-6-filters","title":"20x24x4 Koch Multi-Pleat XL8 MERV 8 High Capacity 102-701-029 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e102-701-029\u003c\/strong\u003e) of the \u003cstrong\u003eKoch Multi-Pleat XL8\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 8\u003c\/strong\u003e filtration in the \u003cstrong\u003eHigh Capacity\u003c\/strong\u003e configuration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat makes the HC (High Capacity) different?\u003c\/h3\u003e\n\u003cp\u003eThe High Capacity variant uses a denser pleat pattern, giving it more media surface area in the same footprint. More surface area means more dust can load before reaching end-of-life pressure drop — so HC filters last longer in dusty environments, light commercial settings, and pre-filter applications where replacement frequency is a cost driver.\u003c\/p\u003e\n\u003ch3\u003eMERV 8 — standard efficiency\u003c\/h3\u003e\n\u003cp\u003eMERV 8 is the baseline for good residential and light commercial filtration: effective against household dust, lint, larger pollens, and dust-mite debris — with low pressure drop so it protects airflow and coil performance. It's the right choice when system protection and clean returns are the goal, not allergen-level filtration.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic blended fibers, engineered for high initial efficiency and low pressure drop. Mechanical capture — performance doesn't fade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Recyclable beverage-board frame with double-wall construction for high-humidity durability. Expanded galvanized-steel grid bonded to the air-exiting side maintains pleat uniformity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C) continuous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office buildings, schools, retail, light industrial, and residential HVAC where extended-surface pleated filtration is specified. UL 900 and ULC-S111-07 certified.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-8-pleated-air-filters-12-pack\"\u003ePrimeShield Essential (MERV 8)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":43937902755962,"sku":"102-701-029","price":246.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_f6929ac9-af93-4602-8e37-86671e0cc874.jpg?v=1742185353"},{"product_id":"20x24x4-koch-multi-pleat-xl10-merv-10-102-380-028-6-filters","title":"20x24x4 Koch Multi-Pleat XL10 MERV 10 102-380-029 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e102-380-029\u003c\/strong\u003e) of the \u003cstrong\u003eKoch Multi-Pleat XL10\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 10\u003c\/strong\u003e filtration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 10 captures\u003c\/h3\u003e\n\u003cp\u003eFiner household dust, most pollen, mold spores, pet dander, and larger bacteria-sized particles — a practical step up for allergy-sensitive homes, wildfire-smoke regions, and light commercial spaces. Mechanical (not electrostatic) capture means performance doesn't fade as the filter loads.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic blended fibers, engineered for high initial efficiency and low pressure drop. Mechanical capture — performance doesn't fade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Recyclable beverage-board frame with double-wall construction for high-humidity durability. Expanded galvanized-steel grid bonded to the air-exiting side maintains pleat uniformity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C) continuous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office buildings, schools, retail, light industrial, and residential HVAC where extended-surface pleated filtration is specified. UL 900 and ULC-S111-07 certified.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-10-pleated-air-filters-12-pack\"\u003ePrimeShield Enhanced (MERV 10)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":43937988542586,"sku":"102-380-029","price":216.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_ca28552a-9fb2-47e7-b5ff-89e17e29fb47.jpg?v=1759429947"},{"product_id":"20x24x4-koch-multi-pleat-xl10-merv-10-high-capacity-102-390-029-6-filters","title":"20x24x4 Koch Multi-Pleat XL10 MERV 10 High Capacity 102-390-029 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e102-390-029\u003c\/strong\u003e) of the \u003cstrong\u003eKoch Multi-Pleat XL10\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 10\u003c\/strong\u003e filtration in the \u003cstrong\u003eHigh Capacity\u003c\/strong\u003e configuration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat makes the HC (High Capacity) different?\u003c\/h3\u003e\n\u003cp\u003eThe High Capacity variant uses a denser pleat pattern, giving it more media surface area in the same footprint. More surface area means more dust can load before reaching end-of-life pressure drop — so HC filters last longer in dusty environments, light commercial settings, and pre-filter applications where replacement frequency is a cost driver.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 10 captures\u003c\/h3\u003e\n\u003cp\u003eFiner household dust, most pollen, mold spores, pet dander, and larger bacteria-sized particles — a practical step up for allergy-sensitive homes, wildfire-smoke regions, and light commercial spaces. Mechanical (not electrostatic) capture means performance doesn't fade as the filter loads.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic blended fibers, engineered for high initial efficiency and low pressure drop. Mechanical capture — performance doesn't fade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Recyclable beverage-board frame with double-wall construction for high-humidity durability. Expanded galvanized-steel grid bonded to the air-exiting side maintains pleat uniformity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C) continuous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office buildings, schools, retail, light industrial, and residential HVAC where extended-surface pleated filtration is specified. UL 900 and ULC-S111-07 certified.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-10-pleated-air-filters-12-pack\"\u003ePrimeShield Enhanced (MERV 10)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":43938129051770,"sku":"102-390-029","price":260.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_eddbf815-3e61-4ba0-a930-33eaa7790dd7.jpg?v=1742256095"},{"product_id":"20x24x4-koch-multi-pleat-xl11-merv-11-102-499-029-6-filters","title":"20x24x4 Koch Multi-Pleat XL11 MERV 11 102-499-029 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e102-499-029\u003c\/strong\u003e) of the \u003cstrong\u003eKoch Multi-Pleat XL11\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\n\u003cp\u003eFine dust, pollen, pet dander, mold spores, smoke particles, and smaller allergens. MERV 11 is the standard recommendation for households with allergies, asthma, or pets, and is commonly specified for commercial office spaces where indoor air quality is a priority. Confirm your system can handle the slight increase in static pressure compared to MERV 8.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic blended fibers, engineered for high initial efficiency and low pressure drop. Mechanical capture — performance doesn't fade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Recyclable beverage-board frame with double-wall construction for high-humidity durability. Expanded galvanized-steel grid bonded to the air-exiting side maintains pleat uniformity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C) continuous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office buildings, schools, retail, light industrial, and residential HVAC where extended-surface pleated filtration is specified. UL 900 and ULC-S111-07 certified.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-11-pleated-air-filters-12-pack\"\u003ePrimeShield Advanced (MERV 11)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":43938142584954,"sku":"102-499-029","price":261.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_afeb170f-0c59-40b7-bcfc-2fea351ea7ad.jpg?v=1742257049"},{"product_id":"20x24x4-koch-multi-pleat-xl11-merv-11-high-capacity-102-500-029-6-filters","title":"20x24x4 Koch Multi-Pleat XL11 MERV 11 High Capacity 102-500-029 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e102-500-029\u003c\/strong\u003e) of the \u003cstrong\u003eKoch Multi-Pleat XL11\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in the \u003cstrong\u003eHigh Capacity\u003c\/strong\u003e configuration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat makes the HC (High Capacity) different?\u003c\/h3\u003e\n\u003cp\u003eThe High Capacity variant uses a denser pleat pattern, giving it more media surface area in the same footprint. More surface area means more dust can load before reaching end-of-life pressure drop — so HC filters last longer in dusty environments, light commercial settings, and pre-filter applications where replacement frequency is a cost driver.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\n\u003cp\u003eFine dust, pollen, pet dander, mold spores, smoke particles, and smaller allergens. MERV 11 is the standard recommendation for households with allergies, asthma, or pets, and is commonly specified for commercial office spaces where indoor air quality is a priority. Confirm your system can handle the slight increase in static pressure compared to MERV 8.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic blended fibers, engineered for high initial efficiency and low pressure drop. Mechanical capture — performance doesn't fade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Recyclable beverage-board frame with double-wall construction for high-humidity durability. Expanded galvanized-steel grid bonded to the air-exiting side maintains pleat uniformity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C) continuous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office buildings, schools, retail, light industrial, and residential HVAC where extended-surface pleated filtration is specified. UL 900 and ULC-S111-07 certified.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-11-pleated-air-filters-12-pack\"\u003ePrimeShield Advanced (MERV 11)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":43938248065146,"sku":"102-500-029","price":276.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_2885da43-9b08-490d-9a5f-f77409bccd0f.jpg?v=1759429973"},{"product_id":"20x24x4-koch-multi-pleat-green13-merv-13-high-capacity-102-714-029-6-filters","title":"20x24x4 Koch Multi-Pleat Green13 MERV 13 High Capacity 102-714-029 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e102-714-029\u003c\/strong\u003e) of the \u003cstrong\u003eKoch Multi-Pleat Green13\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in the \u003cstrong\u003eHigh Capacity\u003c\/strong\u003e configuration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat makes the HC (High Capacity) different?\u003c\/h3\u003e\n\u003cp\u003eThe High Capacity variant uses a denser pleat pattern, giving it more media surface area in the same footprint. More surface area means more dust can load before reaching end-of-life pressure drop — so HC filters last longer in dusty environments, light commercial settings, and pre-filter applications where replacement frequency is a cost driver.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\n\u003cp\u003eVery fine particles including smoke, bacteria-sized particles, and virus carriers attached to larger droplets, on top of everything MERV 11 captures. Commonly specified for commercial spaces with higher indoor-air-quality requirements and for homes with wildfire smoke or air-quality concerns. Ensure your HVAC system is rated for the increased static pressure.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic blended fibers, engineered for high initial efficiency and low pressure drop. Mechanical capture — performance doesn't fade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Recyclable beverage-board frame with double-wall construction for high-humidity durability. Expanded galvanized-steel grid bonded to the air-exiting side maintains pleat uniformity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C) continuous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office buildings, schools, retail, light industrial, and residential HVAC where extended-surface pleated filtration is specified. UL 900 and ULC-S111-07 certified.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-13-pleated-air-filters-12-pack\"\u003ePrimeShield Elite (MERV 13)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":43938252193914,"sku":"102-714-029","price":444.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_5d371069-6e80-4348-a3b8-113136c4877d.jpg?v=1759429980"},{"product_id":"20x24x4-koch-multi-pleat-boss-heavy-duty-high-capacity-merv-9-102-701-129-6-filters","title":"20x24x4 Koch Multi-Pleat Boss Heavy Duty MERV 9 High Capacity 102-701-129 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e102-701-129\u003c\/strong\u003e) of the \u003cstrong\u003eKoch Multi-Pleat Boss Heavy Duty\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 9\u003c\/strong\u003e filtration in the \u003cstrong\u003eHigh Capacity\u003c\/strong\u003e configuration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat makes the HC (High Capacity) different?\u003c\/h3\u003e\n\u003cp\u003eThe High Capacity variant uses a denser pleat pattern, giving it more media surface area in the same footprint. More surface area means more dust can load before reaching end-of-life pressure drop — so HC filters last longer in dusty environments, light commercial settings, and pre-filter applications where replacement frequency is a cost driver.\u003c\/p\u003e\n\u003ch3\u003eMERV 9 — step up from MERV 8\u003c\/h3\u003e\n\u003cp\u003eMERV 9 captures smaller particles than MERV 8 while keeping airflow resistance in reach for standard residential and light commercial systems. A practical middle-ground when you want finer filtration without jumping to MERV 11 or 13.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic blended fibers, engineered for high initial efficiency and low pressure drop. Mechanical capture — performance doesn't fade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Recyclable beverage-board frame with double-wall construction for high-humidity durability. Expanded galvanized-steel grid bonded to the air-exiting side maintains pleat uniformity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C) continuous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office buildings, schools, retail, light industrial, and residential HVAC where extended-surface pleated filtration is specified. UL 900 and ULC-S111-07 certified.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-8-pleated-air-filters-12-pack\"\u003ePrimeShield Essential (MERV 8)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":43938253308026,"sku":"102-701-129","price":285.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_3dd4cc67-1e5c-404a-8d7e-2a6b31f5e394.jpg?v=1742260713"},{"product_id":"20x24x4-koch-multi-pleat-boss-heavy-duty-high-capacity-merv-11-102-500-129-6-filters","title":"20x24x4 Koch Multi-Pleat Boss Heavy Duty MERV 11 High Capacity 102-500-129 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e102-500-129\u003c\/strong\u003e) of the \u003cstrong\u003eKoch Multi-Pleat Boss Heavy Duty\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in the \u003cstrong\u003eHigh Capacity\u003c\/strong\u003e configuration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat makes the HC (High Capacity) different?\u003c\/h3\u003e\n\u003cp\u003eThe High Capacity variant uses a denser pleat pattern, giving it more media surface area in the same footprint. More surface area means more dust can load before reaching end-of-life pressure drop — so HC filters last longer in dusty environments, light commercial settings, and pre-filter applications where replacement frequency is a cost driver.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\n\u003cp\u003eFine dust, pollen, pet dander, mold spores, smoke particles, and smaller allergens. MERV 11 is the standard recommendation for households with allergies, asthma, or pets, and is commonly specified for commercial office spaces where indoor air quality is a priority. Confirm your system can handle the slight increase in static pressure compared to MERV 8.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic blended fibers, engineered for high initial efficiency and low pressure drop. Mechanical capture — performance doesn't fade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Recyclable beverage-board frame with double-wall construction for high-humidity durability. Expanded galvanized-steel grid bonded to the air-exiting side maintains pleat uniformity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C) continuous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office buildings, schools, retail, light industrial, and residential HVAC where extended-surface pleated filtration is specified. UL 900 and ULC-S111-07 certified.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-11-pleated-air-filters-12-pack\"\u003ePrimeShield Advanced (MERV 11)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":43938256289914,"sku":"102-500-129","price":304.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_30831470-b7e5-4866-bd02-d67affba62c9.jpg?v=1742260813"},{"product_id":"20x24x4-koch-multi-pleat-boss-heavy-duty-high-capacity-merv-13-102-714-129-6-filters","title":"20x24x4 Koch Multi-Pleat Boss Heavy Duty MERV 13 High Capacity 102-714-129 (6 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e listing (part number \u003cstrong\u003e102-714-129\u003c\/strong\u003e) of the \u003cstrong\u003eKoch Multi-Pleat Boss Heavy Duty\u003c\/strong\u003e pleated air filter delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in the \u003cstrong\u003eHigh Capacity\u003c\/strong\u003e configuration and ships as a case of \u003cstrong\u003e6 filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat makes the HC (High Capacity) different?\u003c\/h3\u003e\n\u003cp\u003eThe High Capacity variant uses a denser pleat pattern, giving it more media surface area in the same footprint. More surface area means more dust can load before reaching end-of-life pressure drop — so HC filters last longer in dusty environments, light commercial settings, and pre-filter applications where replacement frequency is a cost driver.\u003c\/p\u003e\n\u003ch3\u003eWhat MERV 13 captures\u003c\/h3\u003e\n\u003cp\u003eVery fine particles including smoke, bacteria-sized particles, and virus carriers attached to larger droplets, on top of everything MERV 11 captures. Commonly specified for commercial spaces with higher indoor-air-quality requirements and for homes with wildfire smoke or air-quality concerns. Ensure your HVAC system is rated for the increased static pressure.\u003c\/p\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic blended fibers, engineered for high initial efficiency and low pressure drop. Mechanical capture — performance doesn't fade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Recyclable beverage-board frame with double-wall construction for high-humidity durability. Expanded galvanized-steel grid bonded to the air-exiting side maintains pleat uniformity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax operating temperature:\u003c\/strong\u003e 200°F (93°C) continuous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eCommercial office buildings, schools, retail, light industrial, and residential HVAC where extended-surface pleated filtration is specified. UL 900 and ULC-S111-07 certified.\u003c\/p\u003e\n\u003ch3\u003eReplacement schedule\u003c\/h3\u003e\n\u003cp\u003eAt 4″ depth, plan to replace this filter \u003cstrong\u003eevery 6–12 months\u003c\/strong\u003e under typical residential or light commercial loading. High-dust environments, pet homes, wildfire smoke events, or construction-adjacent sites will shorten that window. Check the filter monthly through the first cycle to calibrate your schedule.\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-13-pleated-air-filters-12-pack\"\u003ePrimeShield Elite (MERV 13)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":43938260091002,"sku":"102-714-129","price":549.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_c48429de-3c0c-42aa-a196-236c2579c1c6.jpg?v=1742260922"},{"product_id":"20x24x4-varicel-2-high-capacity-no-header-merv-11-3184626-606-4-filters","title":"20x24x4 AAF Flanders VariCel 2+ High Capacity No Header MERV 11 3184626-606 (4 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eAAF Flanders VariCel 2+\u003c\/strong\u003e filter (part number 3184626-606) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a rigid extended-surface construction for commercial and industrial HVAC.\u003c\/p\u003e\n\u003cp\u003eThe VariCel 2+ uses AAF's \u003cstrong\u003eImpress® Technology\u003c\/strong\u003e for low initial resistance, superior mechanical strength, and energy-efficient operation in VAV and turbulent-airflow systems.\u003c\/p\u003e\n\u003ch3\u003eWhen VariCel is specified\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable air volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction holds pleat geometry across the full airflow range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-humidity environments\u003c\/strong\u003e — moisture-resistant frame won't delaminate or warp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurbulent airflow\u003c\/strong\u003e — reinforced construction handles velocity variation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecialized applications\u003c\/strong\u003e — paint-booth diffusion filters, cleanroom pre-filters, cannabis cultivation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Dual-density extended-surface synthetic or microfiberglass (MERV-dependent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Rigid metal and board composite construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e No Header\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\n\u003cp\u003eFine dust, pollen, pet dander, mold spores, smoke particles, and smaller allergens. MERV 11 is the standard recommendation for households with allergies, asthma, or pets, and is commonly specified for commercial office spaces where indoor air quality is a priority. Confirm your system can handle the slight increase in static pressure compared to MERV 8.\u003c\/p\u003e\n\u003ch3\u003eNeed help with sizing or cross-reference?\u003c\/h3\u003e\n\u003cp\u003eIf you're replacing an existing filter from a different manufacturer or need help matching the spec, \u003ca href=\"\/pages\/contact-us\"\u003esend us your current part number\u003c\/a\u003e and we'll confirm the exact match.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_Plus_AFP-1-824.pdf?v=1751562002%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload VariCel 2+ spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-11-pleated-air-filters-12-pack\"\u003ePrimeShield Advanced (MERV 11)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":44019611598970,"sku":"3184626-606","price":541.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_plus_HC_noheader_193c7070-ce25-4922-b6cc-a75043792c41.jpg?v=1751562552"},{"product_id":"20x24x4-varicel-2-high-capacity-no-header-merv-14-3184626-806-4-filters","title":"20x24x4 AAF Flanders VariCel 2+ High Capacity No Header MERV 14 3184626-806 (4 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eAAF Flanders VariCel 2+\u003c\/strong\u003e filter (part number 3184626-806) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a rigid extended-surface construction for commercial and industrial HVAC.\u003c\/p\u003e\n\u003cp\u003eThe VariCel 2+ uses AAF's \u003cstrong\u003eImpress® Technology\u003c\/strong\u003e for low initial resistance, superior mechanical strength, and energy-efficient operation in VAV and turbulent-airflow systems.\u003c\/p\u003e\n\u003ch3\u003eWhen VariCel is specified\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable air volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction holds pleat geometry across the full airflow range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-humidity environments\u003c\/strong\u003e — moisture-resistant frame won't delaminate or warp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurbulent airflow\u003c\/strong\u003e — reinforced construction handles velocity variation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecialized applications\u003c\/strong\u003e — paint-booth diffusion filters, cleanroom pre-filters, cannabis cultivation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Dual-density extended-surface synthetic or microfiberglass (MERV-dependent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Rigid metal and board composite construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e No Header\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\n\u003cp\u003eSub-micron particles including most smoke and bacteria-sized particles. MERV 14 is a commercial-grade filtration tier, typically used as final filter in commercial air handlers or as a high-efficiency upgrade in facilities with dedicated high-MERV systems. Standard residential HVAC equipment is rarely rated for MERV 14 static pressure.\u003c\/p\u003e\n\u003ch3\u003eNeed help with sizing or cross-reference?\u003c\/h3\u003e\n\u003cp\u003eIf you're replacing an existing filter from a different manufacturer or need help matching the spec, \u003ca href=\"\/pages\/contact-us\"\u003esend us your current part number\u003c\/a\u003e and we'll confirm the exact match.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_Plus_AFP-1-824.pdf?v=1751562002%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload VariCel 2+ spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-13-pleated-air-filters-12-pack\"\u003ePrimeShield Elite (MERV 13)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":44019611959418,"sku":"3184626-806","price":541.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_plus_HC_noheader_d4727c1f-7201-493d-be58-1e4f27c9dac4.jpg?v=1751562631"},{"product_id":"20x24x4-varicel-2-high-capacity-no-header-merv-15-3184626-906-4-filters","title":"20x24x4 AAF Flanders VariCel 2+ High Capacity No Header MERV 15 3184626-906 (4 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eAAF Flanders VariCel 2+\u003c\/strong\u003e filter (part number 3184626-906) delivers \u003cstrong\u003eMERV 15\u003c\/strong\u003e filtration in a rigid extended-surface construction for commercial and industrial HVAC.\u003c\/p\u003e\n\u003cp\u003eThe VariCel 2+ uses AAF's \u003cstrong\u003eImpress® Technology\u003c\/strong\u003e for low initial resistance, superior mechanical strength, and energy-efficient operation in VAV and turbulent-airflow systems.\u003c\/p\u003e\n\u003ch3\u003eWhen VariCel is specified\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable air volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction holds pleat geometry across the full airflow range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-humidity environments\u003c\/strong\u003e — moisture-resistant frame won't delaminate or warp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurbulent airflow\u003c\/strong\u003e — reinforced construction handles velocity variation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecialized applications\u003c\/strong\u003e — paint-booth diffusion filters, cleanroom pre-filters, cannabis cultivation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Dual-density extended-surface synthetic or microfiberglass (MERV-dependent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Rigid metal and board composite construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e No Header\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 15 per ASHRAE 52.2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat MERV 15 captures\u003c\/h3\u003e\n\u003cp\u003eVery high-efficiency commercial filtration: captures most sub-micron particles including smoke and bacteria. MERV 15 is typically installed in commercial air handlers purpose-built for high-efficiency media, or as a final filter in multi-stage filtration systems. Not appropriate for standard residential HVAC without system modification.\u003c\/p\u003e\n\u003ch3\u003eNeed help with sizing or cross-reference?\u003c\/h3\u003e\n\u003cp\u003eIf you're replacing an existing filter from a different manufacturer or need help matching the spec, \u003ca href=\"\/pages\/contact-us\"\u003esend us your current part number\u003c\/a\u003e and we'll confirm the exact match.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_Plus_AFP-1-824.pdf?v=1751562002%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload VariCel 2+ spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-13-pleated-air-filters-12-pack\"\u003ePrimeShield Elite (MERV 13)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":44019612352634,"sku":"3184626-906","price":554.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_plus_HC_noheader_7f13dfa4-342f-4990-8c78-5a1323bd484e.jpg?v=1751562704"},{"product_id":"20x24x4-varicel-2-high-capacity-single-header-merv-11-3184627-606-4-filters","title":"20x24x4 AAF Flanders VariCel 2+ High Capacity Single Header MERV 11 3184627-606 (4 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eAAF Flanders VariCel 2+\u003c\/strong\u003e filter (part number 3184627-606) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a rigid extended-surface construction for commercial and industrial HVAC.\u003c\/p\u003e\n\u003cp\u003eThe VariCel 2+ uses AAF's \u003cstrong\u003eImpress® Technology\u003c\/strong\u003e for low initial resistance, superior mechanical strength, and energy-efficient operation in VAV and turbulent-airflow systems.\u003c\/p\u003e\n\u003ch3\u003eWhen VariCel is specified\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable air volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction holds pleat geometry across the full airflow range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-humidity environments\u003c\/strong\u003e — moisture-resistant frame won't delaminate or warp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurbulent airflow\u003c\/strong\u003e — reinforced construction handles velocity variation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecialized applications\u003c\/strong\u003e — paint-booth diffusion filters, cleanroom pre-filters, cannabis cultivation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Dual-density extended-surface synthetic or microfiberglass (MERV-dependent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Rigid metal and board composite construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single Header\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat MERV 11 captures\u003c\/h3\u003e\n\u003cp\u003eFine dust, pollen, pet dander, mold spores, smoke particles, and smaller allergens. MERV 11 is the standard recommendation for households with allergies, asthma, or pets, and is commonly specified for commercial office spaces where indoor air quality is a priority. Confirm your system can handle the slight increase in static pressure compared to MERV 8.\u003c\/p\u003e\n\u003ch3\u003eNeed help with sizing or cross-reference?\u003c\/h3\u003e\n\u003cp\u003eIf you're replacing an existing filter from a different manufacturer or need help matching the spec, \u003ca href=\"\/pages\/contact-us\"\u003esend us your current part number\u003c\/a\u003e and we'll confirm the exact match.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_Plus_AFP-1-824.pdf?v=1751562002%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload VariCel 2+ spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-11-pleated-air-filters-12-pack\"\u003ePrimeShield Advanced (MERV 11)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":44019612942458,"sku":"3184627-606","price":559.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_plus_HC_with_header_effd58ca-2ac5-4c77-a24f-f1dbb40e2b7d.jpg?v=1751562776"},{"product_id":"20x24x4-varicel-2-high-capacity-single-header-merv-14-3184627-806-4-filters","title":"20x24x4 AAF Flanders VariCel 2+ High Capacity Single Header MERV 14 3184627-806 (4 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eAAF Flanders VariCel 2+\u003c\/strong\u003e filter (part number 3184627-806) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a rigid extended-surface construction for commercial and industrial HVAC.\u003c\/p\u003e\n\u003cp\u003eThe VariCel 2+ uses AAF's \u003cstrong\u003eImpress® Technology\u003c\/strong\u003e for low initial resistance, superior mechanical strength, and energy-efficient operation in VAV and turbulent-airflow systems.\u003c\/p\u003e\n\u003ch3\u003eWhen VariCel is specified\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable air volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction holds pleat geometry across the full airflow range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-humidity environments\u003c\/strong\u003e — moisture-resistant frame won't delaminate or warp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurbulent airflow\u003c\/strong\u003e — reinforced construction handles velocity variation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecialized applications\u003c\/strong\u003e — paint-booth diffusion filters, cleanroom pre-filters, cannabis cultivation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Dual-density extended-surface synthetic or microfiberglass (MERV-dependent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Rigid metal and board composite construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single Header\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat MERV 14 captures\u003c\/h3\u003e\n\u003cp\u003eSub-micron particles including most smoke and bacteria-sized particles. MERV 14 is a commercial-grade filtration tier, typically used as final filter in commercial air handlers or as a high-efficiency upgrade in facilities with dedicated high-MERV systems. Standard residential HVAC equipment is rarely rated for MERV 14 static pressure.\u003c\/p\u003e\n\u003ch3\u003eNeed help with sizing or cross-reference?\u003c\/h3\u003e\n\u003cp\u003eIf you're replacing an existing filter from a different manufacturer or need help matching the spec, \u003ca href=\"\/pages\/contact-us\"\u003esend us your current part number\u003c\/a\u003e and we'll confirm the exact match.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_Plus_AFP-1-824.pdf?v=1751562002%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload VariCel 2+ spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-13-pleated-air-filters-12-pack\"\u003ePrimeShield Elite (MERV 13)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":44019617136762,"sku":"3184627-806","price":559.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_plus_HC_with_header_2d18e3cb-260b-44ba-a852-b0807904513a.jpg?v=1751562837"},{"product_id":"20x24x4-varicel-2-high-capacity-single-header-merv-15-3184627-906-4-filters","title":"20x24x4 AAF Flanders VariCel 2+ High Capacity Single Header MERV 15 3184627-906 (4 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eAAF Flanders VariCel 2+\u003c\/strong\u003e filter (part number 3184627-906) delivers \u003cstrong\u003eMERV 15\u003c\/strong\u003e filtration in a rigid extended-surface construction for commercial and industrial HVAC.\u003c\/p\u003e\n\u003cp\u003eThe VariCel 2+ uses AAF's \u003cstrong\u003eImpress® Technology\u003c\/strong\u003e for low initial resistance, superior mechanical strength, and energy-efficient operation in VAV and turbulent-airflow systems.\u003c\/p\u003e\n\u003ch3\u003eWhen VariCel is specified\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable air volume (VAV) commercial HVAC\u003c\/strong\u003e — rigid construction holds pleat geometry across the full airflow range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-humidity environments\u003c\/strong\u003e — moisture-resistant frame won't delaminate or warp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurbulent airflow\u003c\/strong\u003e — reinforced construction handles velocity variation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecialized applications\u003c\/strong\u003e — paint-booth diffusion filters, cleanroom pre-filters, cannabis cultivation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDesign and construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Dual-density extended-surface synthetic or microfiberglass (MERV-dependent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Rigid metal and board composite construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Single Header\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 15 per ASHRAE 52.2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat MERV 15 captures\u003c\/h3\u003e\n\u003cp\u003eVery high-efficiency commercial filtration: captures most sub-micron particles including smoke and bacteria. MERV 15 is typically installed in commercial air handlers purpose-built for high-efficiency media, or as a final filter in multi-stage filtration systems. Not appropriate for standard residential HVAC without system modification.\u003c\/p\u003e\n\u003ch3\u003eNeed help with sizing or cross-reference?\u003c\/h3\u003e\n\u003cp\u003eIf you're replacing an existing filter from a different manufacturer or need help matching the spec, \u003ca href=\"\/pages\/contact-us\"\u003esend us your current part number\u003c\/a\u003e and we'll confirm the exact match.\u003c\/p\u003e\n\u003ch3\u003eSpec sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_Plus_AFP-1-824.pdf?v=1751562002%E2%80%B3%20rel=\" noopener target=\"_blank\"\u003eDownload VariCel 2+ spec sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eAlso worth considering\u003c\/h3\u003e\n\u003cp\u003eShopping on price? Our house brand \u003ca href=\"\/products\/merv-13-pleated-air-filters-12-pack\"\u003ePrimeShield Elite (MERV 13)\u003c\/a\u003e covers the same efficiency tier across common residential and commercial sizes and is usually the better value. Choose this branded option when your equipment spec sheet or facilities team calls for it specifically.\u003c\/p\u003e\n\u003ch3\u003eQuestions on fit, quantity, or a commercial quote?\u003c\/h3\u003e\n\u003cp\u003eNeed a size that isn't listed, a different pack count, or a quote for a commercial order? \u003ca href=\"\/pages\/contact-us\"\u003eGet in touch\u003c\/a\u003e — we handle facilities and commercial orders daily and can usually match or beat distributor pricing.\u003c\/p\u003e","brand":"AAF Flanders","offers":[{"title":"Default Title","offer_id":44019621068922,"sku":"3184627-906","price":574.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/VariCel_2_plus_HC_with_header_62d39286-bbb4-4fd0-bae8-00b58cc6346d.jpg?v=1751562904"},{"product_id":"20x24x4-koch-micromax-beverage-board-merv-14-120-700-003","title":"20x24x4 Koch MicroMAX Beverage Board Frame MERV 14 120-700-003 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-700-003) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003estandard beverage board frame\u003c\/strong\u003e — the lightweight, cost-effective option for general commercial HVAC at operating temperatures up to \u003cstrong\u003e150°F \/ 66°C\u003c\/strong\u003e.\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 Beverage Board (BB)\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 150°F \/ 66°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":44118779003002,"sku":"120-700-003","price":396.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_1a325135-cfa7-4007-8da3-3ff89d774d82.png?v=1777659377"},{"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":"20x24x4-koch-micromax-beverage-board-merv-13-120-701-003","title":"20x24x4 Koch MicroMAX Beverage Board Frame MERV 13 120-701-003 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX\u003c\/strong\u003e filter (part number 120-701-003) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a compact 4-inch-deep minipleat design with a \u003cstrong\u003estandard beverage board frame\u003c\/strong\u003e — the lightweight, cost-effective option for general commercial HVAC at operating temperatures up to \u003cstrong\u003e150°F \/ 66°C\u003c\/strong\u003e.\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 Beverage Board (BB)\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 150°F \/ 66°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. 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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. 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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. 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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 Beverage Board (BB)\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 150°F \/ 66°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":44118780969082,"sku":"120-702-003","price":346.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_3b0001c3-6174-4fbe-b513-fbae4527e4c0.png?v=1777659604"},{"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. 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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":"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":"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":"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":"20x24x4-koch-micromax-pl4s-merv-15-120-614-2024","title":"20x24x4 Koch MicroMAX PL4S Box Style MERV 15 120-614-2024 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX PL4S\u003c\/strong\u003e filter (part number 120-614-2024) delivers \u003cstrong\u003eMERV 15\u003c\/strong\u003e filtration in a 4-inch-deep extended-surface minipleat design with \u003cstrong\u003e100% synthetic media\u003c\/strong\u003e and a plastic frame.\u003c\/p\u003e\u003cp\u003eThe PL4S is the mid-depth, all-synthetic option in the MicroMAX line. It splits the difference between the slim 2″ PL2S and the deeper 6″ PL6, delivering meaningfully greater dust-holding capacity than the 2″ format while remaining lightweight and compact. The 100% synthetic media holds up where micro fiberglass paper historically struggles — high humidity, frequent wet\/dry cycles, marine and coastal air, and aggressive face velocities — and the media pack is bonded to the entire periphery of the plastic frame to eliminate bypass.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX PL4S is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — the standard depth for many commercial AHUs and air handlers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-moisture environments\u003c\/strong\u003e — coastal, marine, humid industrial; synthetic media doesn’t shed or weaken the way glass-fiber paper can\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity HVAC\u003c\/strong\u003e — rigid extended-surface construction in synthetic media maintains pleat geometry under turbulent airflow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) systems\u003c\/strong\u003e — reliable performance through airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLonger service life than 2″ alternatives\u003c\/strong\u003e — 4″ depth doubles dust-holding capacity vs the PL2S, extending changeout intervals\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\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic, extended-surface minipleat construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Plastic (Box Style, no peripheral header)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia-pack-to-frame seal:\u003c\/strong\u003e Bonded to entire frame periphery (eliminates air bypass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat, 4″ nominal depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 15 per ASHRAE 52.2-2017\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e ISO 9001 registered facility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final resistance:\u003c\/strong\u003e 1.5″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable\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 15 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing virtually all sub-micron particles, including fine smoke, bacteria carriers, and most viruses. Specified in healthcare, pharmaceutical, and high-IAQ commercial systems where the next step up is HEPA-class filtration.\u003c\/p\u003e\u003ch3\u003ePL4S vs. PL2S vs. PL6: which to choose\u003c\/h3\u003e\u003cp\u003eAll three are MicroMAX-line plastic-frame minipleat filters, distinguished primarily by depth and media type. The \u003cstrong\u003ePL2S\u003c\/strong\u003e (2″, synthetic) is built for shallow filter slots. The \u003cstrong\u003ePL4S\u003c\/strong\u003e (4″, synthetic) doubles the depth for greater dust-holding capacity while keeping the synthetic-media advantage — the right pick for standard 4″ slots in moisture-prone or high-velocity environments. The \u003cstrong\u003ePL6\u003c\/strong\u003e (6″, micro fiberglass) is the longest-life option in this family for standard commercial environments where moisture isn’t a primary concern. Match depth to your housing first; choose synthetic (PL2S\/PL4S) over fiberglass (PL6) when humidity, marine air, or high airflow velocity are part of the picture.\u003c\/p\u003e\u003ch3\u003ePL4S vs. standard MicroMAX (4″): synthetic vs. microfiberglass\u003c\/h3\u003e\u003cp\u003eBoth filters share the same 4″ depth and minipleat design, but they target different environments. The \u003cstrong\u003estandard MicroMAX\u003c\/strong\u003e (L2-17 \/ L2-18) uses dual-density micro fiberglass paper — the proven workhorse for standard commercial HVAC and the first choice for hospitals and labs running dry, conditioned air. The \u003cstrong\u003ePL4S\u003c\/strong\u003e switches to 100% synthetic media for installations where moisture, condensation, or aggressive face velocities can compromise glass-fiber media. If your facility sees humidity spikes, coastal air, marine exposure, or process-related moisture loads, the synthetic media is the right tool.\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 dimensions are slightly under nominal — standard for the industry; the filter slides into a nominal-sized slot without binding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial sizes are not available.\u003c\/strong\u003e The MicroMAX PL4S ships only in the standard sizes listed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, MicroMAX PL4S ships in full carton quantities for safe transit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleats install in either direction.\u003c\/strong\u003e Width and height are interchangeable on the media pack.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX PL4S drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch box-style minipleat filters in the same nominal size. It serves as a direct upgrade for facilities currently running 4″ pleated panel filters or replacing damaged microfiberglass-media filters in moisture-prone applications.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118787588218,"sku":"120-614-2024","price":467.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_cc7230ad-7d74-4ff2-b2ba-e94d5dd19571.jpg?v=1777661035"},{"product_id":"20x24x4-koch-micromax-pl4s-merv-14-120-624-2024","title":"20x24x4 Koch MicroMAX PL4S Box Style MERV 14 120-624-2024 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX PL4S\u003c\/strong\u003e filter (part number 120-624-2024) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a 4-inch-deep extended-surface minipleat design with \u003cstrong\u003e100% synthetic media\u003c\/strong\u003e and a plastic frame.\u003c\/p\u003e\u003cp\u003eThe PL4S is the mid-depth, all-synthetic option in the MicroMAX line. It splits the difference between the slim 2″ PL2S and the deeper 6″ PL6, delivering meaningfully greater dust-holding capacity than the 2″ format while remaining lightweight and compact. The 100% synthetic media holds up where micro fiberglass paper historically struggles — high humidity, frequent wet\/dry cycles, marine and coastal air, and aggressive face velocities — and the media pack is bonded to the entire periphery of the plastic frame to eliminate bypass.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX PL4S is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — the standard depth for many commercial AHUs and air handlers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-moisture environments\u003c\/strong\u003e — coastal, marine, humid industrial; synthetic media doesn’t shed or weaken the way glass-fiber paper can\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity HVAC\u003c\/strong\u003e — rigid extended-surface construction in synthetic media maintains pleat geometry under turbulent airflow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) systems\u003c\/strong\u003e — reliable performance through airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLonger service life than 2″ alternatives\u003c\/strong\u003e — 4″ depth doubles dust-holding capacity vs the PL2S, extending changeout intervals\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\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic, extended-surface minipleat construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Plastic (Box Style, no peripheral header)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia-pack-to-frame seal:\u003c\/strong\u003e Bonded to entire frame periphery (eliminates air bypass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat, 4″ nominal depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2017\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e ISO 9001 registered facility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final resistance:\u003c\/strong\u003e 1.5″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable\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\u003ePL4S vs. PL2S vs. PL6: which to choose\u003c\/h3\u003e\u003cp\u003eAll three are MicroMAX-line plastic-frame minipleat filters, distinguished primarily by depth and media type. The \u003cstrong\u003ePL2S\u003c\/strong\u003e (2″, synthetic) is built for shallow filter slots. The \u003cstrong\u003ePL4S\u003c\/strong\u003e (4″, synthetic) doubles the depth for greater dust-holding capacity while keeping the synthetic-media advantage — the right pick for standard 4″ slots in moisture-prone or high-velocity environments. The \u003cstrong\u003ePL6\u003c\/strong\u003e (6″, micro fiberglass) is the longest-life option in this family for standard commercial environments where moisture isn’t a primary concern. Match depth to your housing first; choose synthetic (PL2S\/PL4S) over fiberglass (PL6) when humidity, marine air, or high airflow velocity are part of the picture.\u003c\/p\u003e\u003ch3\u003ePL4S vs. standard MicroMAX (4″): synthetic vs. microfiberglass\u003c\/h3\u003e\u003cp\u003eBoth filters share the same 4″ depth and minipleat design, but they target different environments. The \u003cstrong\u003estandard MicroMAX\u003c\/strong\u003e (L2-17 \/ L2-18) uses dual-density micro fiberglass paper — the proven workhorse for standard commercial HVAC and the first choice for hospitals and labs running dry, conditioned air. The \u003cstrong\u003ePL4S\u003c\/strong\u003e switches to 100% synthetic media for installations where moisture, condensation, or aggressive face velocities can compromise glass-fiber media. If your facility sees humidity spikes, coastal air, marine exposure, or process-related moisture loads, the synthetic media is the right tool.\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 dimensions are slightly under nominal — standard for the industry; the filter slides into a nominal-sized slot without binding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial sizes are not available.\u003c\/strong\u003e The MicroMAX PL4S ships only in the standard sizes listed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, MicroMAX PL4S ships in full carton quantities for safe transit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleats install in either direction.\u003c\/strong\u003e Width and height are interchangeable on the media pack.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX PL4S drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch box-style minipleat filters in the same nominal size. It serves as a direct upgrade for facilities currently running 4″ pleated panel filters or replacing damaged microfiberglass-media filters in moisture-prone applications.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118787915898,"sku":"120-624-2024","price":453.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_90285d9b-eaa4-4e02-afa4-fd7d2dc94e7e.jpg?v=1777661102"},{"product_id":"20x24x4-koch-micromax-pl4s-merv-13-120-634-2024","title":"20x24x4 Koch MicroMAX PL4S Box Style MERV 13 120-634-2024 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX PL4S\u003c\/strong\u003e filter (part number 120-634-2024) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a 4-inch-deep extended-surface minipleat design with \u003cstrong\u003e100% synthetic media\u003c\/strong\u003e and a plastic frame.\u003c\/p\u003e\u003cp\u003eThe PL4S is the mid-depth, all-synthetic option in the MicroMAX line. It splits the difference between the slim 2″ PL2S and the deeper 6″ PL6, delivering meaningfully greater dust-holding capacity than the 2″ format while remaining lightweight and compact. The 100% synthetic media holds up where micro fiberglass paper historically struggles — high humidity, frequent wet\/dry cycles, marine and coastal air, and aggressive face velocities — and the media pack is bonded to the entire periphery of the plastic frame to eliminate bypass.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX PL4S is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — the standard depth for many commercial AHUs and air handlers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-moisture environments\u003c\/strong\u003e — coastal, marine, humid industrial; synthetic media doesn’t shed or weaken the way glass-fiber paper can\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity HVAC\u003c\/strong\u003e — rigid extended-surface construction in synthetic media maintains pleat geometry under turbulent airflow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) systems\u003c\/strong\u003e — reliable performance through airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLonger service life than 2″ alternatives\u003c\/strong\u003e — 4″ depth doubles dust-holding capacity vs the PL2S, extending changeout intervals\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\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic, extended-surface minipleat construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Plastic (Box Style, no peripheral header)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia-pack-to-frame seal:\u003c\/strong\u003e Bonded to entire frame periphery (eliminates air bypass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat, 4″ nominal depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2017\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e ISO 9001 registered facility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final resistance:\u003c\/strong\u003e 1.5″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable\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\u003ePL4S vs. PL2S vs. PL6: which to choose\u003c\/h3\u003e\u003cp\u003eAll three are MicroMAX-line plastic-frame minipleat filters, distinguished primarily by depth and media type. The \u003cstrong\u003ePL2S\u003c\/strong\u003e (2″, synthetic) is built for shallow filter slots. The \u003cstrong\u003ePL4S\u003c\/strong\u003e (4″, synthetic) doubles the depth for greater dust-holding capacity while keeping the synthetic-media advantage — the right pick for standard 4″ slots in moisture-prone or high-velocity environments. The \u003cstrong\u003ePL6\u003c\/strong\u003e (6″, micro fiberglass) is the longest-life option in this family for standard commercial environments where moisture isn’t a primary concern. Match depth to your housing first; choose synthetic (PL2S\/PL4S) over fiberglass (PL6) when humidity, marine air, or high airflow velocity are part of the picture.\u003c\/p\u003e\u003ch3\u003ePL4S vs. standard MicroMAX (4″): synthetic vs. microfiberglass\u003c\/h3\u003e\u003cp\u003eBoth filters share the same 4″ depth and minipleat design, but they target different environments. The \u003cstrong\u003estandard MicroMAX\u003c\/strong\u003e (L2-17 \/ L2-18) uses dual-density micro fiberglass paper — the proven workhorse for standard commercial HVAC and the first choice for hospitals and labs running dry, conditioned air. The \u003cstrong\u003ePL4S\u003c\/strong\u003e switches to 100% synthetic media for installations where moisture, condensation, or aggressive face velocities can compromise glass-fiber media. If your facility sees humidity spikes, coastal air, marine exposure, or process-related moisture loads, the synthetic media is the right tool.\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 dimensions are slightly under nominal — standard for the industry; the filter slides into a nominal-sized slot without binding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial sizes are not available.\u003c\/strong\u003e The MicroMAX PL4S ships only in the standard sizes listed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, MicroMAX PL4S ships in full carton quantities for safe transit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleats install in either direction.\u003c\/strong\u003e Width and height are interchangeable on the media pack.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX PL4S drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch box-style minipleat filters in the same nominal size. It serves as a direct upgrade for facilities currently running 4″ pleated panel filters or replacing damaged microfiberglass-media filters in moisture-prone applications.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118788440186,"sku":"120-634-2024","price":447.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_e55cc92f-bb6a-4295-b97c-f7b4e9948ab2.jpg?v=1777661171"},{"product_id":"20x24x4-koch-micromax-pl4s-merv-11-120-654-2024","title":"20x24x4 Koch MicroMAX PL4S Box Style MERV 11 120-654-2024 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX PL4S\u003c\/strong\u003e filter (part number 120-654-2024) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a 4-inch-deep extended-surface minipleat design with \u003cstrong\u003e100% synthetic media\u003c\/strong\u003e and a plastic frame.\u003c\/p\u003e\u003cp\u003eThe PL4S is the mid-depth, all-synthetic option in the MicroMAX line. It splits the difference between the slim 2″ PL2S and the deeper 6″ PL6, delivering meaningfully greater dust-holding capacity than the 2″ format while remaining lightweight and compact. The 100% synthetic media holds up where micro fiberglass paper historically struggles — high humidity, frequent wet\/dry cycles, marine and coastal air, and aggressive face velocities — and the media pack is bonded to the entire periphery of the plastic frame to eliminate bypass.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX PL4S is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch filter slots\u003c\/strong\u003e — the standard depth for many commercial AHUs and air handlers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-moisture environments\u003c\/strong\u003e — coastal, marine, humid industrial; synthetic media doesn’t shed or weaken the way glass-fiber paper can\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity HVAC\u003c\/strong\u003e — rigid extended-surface construction in synthetic media maintains pleat geometry under turbulent airflow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) systems\u003c\/strong\u003e — reliable performance through airflow swings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLonger service life than 2″ alternatives\u003c\/strong\u003e — 4″ depth doubles dust-holding capacity vs the PL2S, extending changeout intervals\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\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic, extended-surface minipleat construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Plastic (Box Style, no peripheral header)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia-pack-to-frame seal:\u003c\/strong\u003e Bonded to entire frame periphery (eliminates air bypass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat, 4″ nominal depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2017\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e ISO 9001 registered facility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final resistance:\u003c\/strong\u003e 1.5″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleat orientation:\u003c\/strong\u003e Width and height are interchangeable\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\u003ePL4S vs. PL2S vs. PL6: which to choose\u003c\/h3\u003e\u003cp\u003eAll three are MicroMAX-line plastic-frame minipleat filters, distinguished primarily by depth and media type. The \u003cstrong\u003ePL2S\u003c\/strong\u003e (2″, synthetic) is built for shallow filter slots. The \u003cstrong\u003ePL4S\u003c\/strong\u003e (4″, synthetic) doubles the depth for greater dust-holding capacity while keeping the synthetic-media advantage — the right pick for standard 4″ slots in moisture-prone or high-velocity environments. The \u003cstrong\u003ePL6\u003c\/strong\u003e (6″, micro fiberglass) is the longest-life option in this family for standard commercial environments where moisture isn’t a primary concern. Match depth to your housing first; choose synthetic (PL2S\/PL4S) over fiberglass (PL6) when humidity, marine air, or high airflow velocity are part of the picture.\u003c\/p\u003e\u003ch3\u003ePL4S vs. standard MicroMAX (4″): synthetic vs. microfiberglass\u003c\/h3\u003e\u003cp\u003eBoth filters share the same 4″ depth and minipleat design, but they target different environments. The \u003cstrong\u003estandard MicroMAX\u003c\/strong\u003e (L2-17 \/ L2-18) uses dual-density micro fiberglass paper — the proven workhorse for standard commercial HVAC and the first choice for hospitals and labs running dry, conditioned air. The \u003cstrong\u003ePL4S\u003c\/strong\u003e switches to 100% synthetic media for installations where moisture, condensation, or aggressive face velocities can compromise glass-fiber media. If your facility sees humidity spikes, coastal air, marine exposure, or process-related moisture loads, the synthetic media is the right tool.\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 dimensions are slightly under nominal — standard for the industry; the filter slides into a nominal-sized slot without binding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial sizes are not available.\u003c\/strong\u003e The MicroMAX PL4S ships only in the standard sizes listed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, MicroMAX PL4S ships in full carton quantities for safe transit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleats install in either direction.\u003c\/strong\u003e Width and height are interchangeable on the media pack.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX PL4S drops into standard 4″-deep filter slots and is interchangeable with most competitive 4-inch box-style minipleat filters in the same nominal size. It serves as a direct upgrade for facilities currently running 4″ pleated panel filters or replacing damaged microfiberglass-media filters in moisture-prone applications.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118788767866,"sku":"120-654-2024","price":440.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_1aad016e-385b-443e-99e8-e8d3c514e524.jpg?v=1777661230"},{"product_id":"20x24x4-koch-micromax-pl4s-header-merv-15-120-615-2024","title":"20x24x4 Koch MicroMAX PL4S Header Style MERV 15 120-615-2024 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX PL4S Header Style\u003c\/strong\u003e filter (part number 120-615-2024) delivers \u003cstrong\u003eMERV 15\u003c\/strong\u003e filtration in a 4-inch-deep extended-surface minipleat design with \u003cstrong\u003e100% synthetic media\u003c\/strong\u003e, a plastic frame, and a \u003cstrong\u003efactory-installed peripheral header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThis is the same proven PL4S construction trusted in commercial HVAC — 4″ depth, all-synthetic dual-layer media, plastic frame, and minipleat geometry — with one critical addition: the peripheral header on the air-entering face. The header guides the filter into side-access housing tracks and seals against the housing gasket on installation, replacing the open-edge box-style construction with a configured fit for side-loaded AHUs. The synthetic-media advantage carries over: this filter holds up to humidity, marine and coastal air, frequent wet\/dry cycles, and aggressive face velocities where micro fiberglass paper can shed or weaken.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX PL4S Header Style is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the peripheral header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront-load holding frames that require header sealing\u003c\/strong\u003e — matches existing system design without retrofit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-moisture environments\u003c\/strong\u003e — coastal, marine, humid industrial; synthetic media doesn’t shed or weaken the way glass-fiber paper can\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity HVAC\u003c\/strong\u003e — rigid extended-surface construction in synthetic media maintains pleat geometry under turbulent airflow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) systems\u003c\/strong\u003e — reliable performance through 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\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic, extended-surface minipleat construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Plastic with factory-installed peripheral header (Header Style)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Factory-bonded to the air-entering side for side-access installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia-pack-to-frame seal:\u003c\/strong\u003e Bonded to entire frame periphery (eliminates air bypass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat, 4″ nominal depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 15 per ASHRAE 52.2-2017\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e ISO 9001 registered facility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final resistance:\u003c\/strong\u003e 1.5″ w.g.\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 15 captures\u003c\/h3\u003e\u003cp\u003eVery high-efficiency filtration capturing virtually all sub-micron particles, including fine smoke, bacteria carriers, and most viruses. Specified in healthcare, pharmaceutical, and high-IAQ commercial systems where the next step up is HEPA-class filtration.\u003c\/p\u003e\u003ch3\u003eHeader Style vs. Box Style: which to choose\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eHeader Style\u003c\/strong\u003e (this filter) is built specifically for housings that load filters from the side and seal against a peripheral header on the air-entering face. The \u003cstrong\u003eBox Style\u003c\/strong\u003e (PL4S Box) is the standard front-loaded version used in most commercial filter slots and holding frames. Both share identical media and frame construction — the only difference is the header. Match this to your housing: if you currently run a header-style filter, replace it with the Header Style; if you run a standard box-style filter, the Box Style PL4S is the right SKU.\u003c\/p\u003e\u003ch3\u003ePL4S Header vs. PL6 Header: synthetic vs. microfiberglass\u003c\/h3\u003e\u003cp\u003eThe PL6 also offers a single-header configuration but uses micro fiberglass paper media instead of synthetic. Both header-style filters serve the same housing type; the choice comes down to environment. The \u003cstrong\u003ePL4S Header\u003c\/strong\u003e (this filter, 4″) is the right pick for high-moisture, marine, coastal, or high-velocity applications where synthetic media outperforms glass-fiber. The \u003cstrong\u003ePL6\u003c\/strong\u003e (6″) offers more dust-holding capacity and longer service life in standard dry-air commercial environments. Match depth to housing first; choose synthetic when moisture or velocity matters.\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 dimensions are slightly under nominal — standard for the industry; the filter slides into a nominal-sized slot without binding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial sizes are not available.\u003c\/strong\u003e The MicroMAX PL4S Header Style ships only in the standard sizes listed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, MicroMAX PL4S ships in full carton quantities for safe transit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe header determines the air-entering face.\u003c\/strong\u003e Unlike the box-style version, the header style has a fixed orientation — install with the header facing the airstream.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX PL4S Header Style is interchangeable with most competitive 4-inch header-style minipleat filters in the same nominal size. It is the direct synthetic-media replacement for headered glass-fiber filters in moisture-prone or high-velocity installations.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118789062778,"sku":"120-615-2024","price":489.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/koch_pl4s_header.png?v=1777660275"},{"product_id":"20x24x4-koch-micromax-pl4s-header-merv-14-120-625-2024","title":"20x24x4 Koch MicroMAX PL4S Header Style MERV 14 120-625-2024 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX PL4S Header Style\u003c\/strong\u003e filter (part number 120-625-2024) delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e filtration in a 4-inch-deep extended-surface minipleat design with \u003cstrong\u003e100% synthetic media\u003c\/strong\u003e, a plastic frame, and a \u003cstrong\u003efactory-installed peripheral header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThis is the same proven PL4S construction trusted in commercial HVAC — 4″ depth, all-synthetic dual-layer media, plastic frame, and minipleat geometry — with one critical addition: the peripheral header on the air-entering face. The header guides the filter into side-access housing tracks and seals against the housing gasket on installation, replacing the open-edge box-style construction with a configured fit for side-loaded AHUs. The synthetic-media advantage carries over: this filter holds up to humidity, marine and coastal air, frequent wet\/dry cycles, and aggressive face velocities where micro fiberglass paper can shed or weaken.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX PL4S Header Style is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the peripheral header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront-load holding frames that require header sealing\u003c\/strong\u003e — matches existing system design without retrofit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-moisture environments\u003c\/strong\u003e — coastal, marine, humid industrial; synthetic media doesn’t shed or weaken the way glass-fiber paper can\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity HVAC\u003c\/strong\u003e — rigid extended-surface construction in synthetic media maintains pleat geometry under turbulent airflow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) systems\u003c\/strong\u003e — reliable performance through 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\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic, extended-surface minipleat construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Plastic with factory-installed peripheral header (Header Style)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Factory-bonded to the air-entering side for side-access installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia-pack-to-frame seal:\u003c\/strong\u003e Bonded to entire frame periphery (eliminates air bypass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat, 4″ nominal depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 14 per ASHRAE 52.2-2017\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e ISO 9001 registered facility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final resistance:\u003c\/strong\u003e 1.5″ w.g.\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\u003eHeader Style vs. Box Style: which to choose\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eHeader Style\u003c\/strong\u003e (this filter) is built specifically for housings that load filters from the side and seal against a peripheral header on the air-entering face. The \u003cstrong\u003eBox Style\u003c\/strong\u003e (PL4S Box) is the standard front-loaded version used in most commercial filter slots and holding frames. Both share identical media and frame construction — the only difference is the header. Match this to your housing: if you currently run a header-style filter, replace it with the Header Style; if you run a standard box-style filter, the Box Style PL4S is the right SKU.\u003c\/p\u003e\u003ch3\u003ePL4S Header vs. PL6 Header: synthetic vs. microfiberglass\u003c\/h3\u003e\u003cp\u003eThe PL6 also offers a single-header configuration but uses micro fiberglass paper media instead of synthetic. Both header-style filters serve the same housing type; the choice comes down to environment. The \u003cstrong\u003ePL4S Header\u003c\/strong\u003e (this filter, 4″) is the right pick for high-moisture, marine, coastal, or high-velocity applications where synthetic media outperforms glass-fiber. The \u003cstrong\u003ePL6\u003c\/strong\u003e (6″) offers more dust-holding capacity and longer service life in standard dry-air commercial environments. Match depth to housing first; choose synthetic when moisture or velocity matters.\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 dimensions are slightly under nominal — standard for the industry; the filter slides into a nominal-sized slot without binding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial sizes are not available.\u003c\/strong\u003e The MicroMAX PL4S Header Style ships only in the standard sizes listed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, MicroMAX PL4S ships in full carton quantities for safe transit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe header determines the air-entering face.\u003c\/strong\u003e Unlike the box-style version, the header style has a fixed orientation — install with the header facing the airstream.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX PL4S Header Style is interchangeable with most competitive 4-inch header-style minipleat filters in the same nominal size. It is the direct synthetic-media replacement for headered glass-fiber filters in moisture-prone or high-velocity installations.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118789357690,"sku":"120-625-2024","price":475.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/koch_pl4s_header.png?v=1777660275"},{"product_id":"20x24x4-koch-micromax-pl4s-header-merv-13-120-635-2024","title":"20x24x4 Koch MicroMAX PL4S Header Style MERV 13 120-635-2024 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX PL4S Header Style\u003c\/strong\u003e filter (part number 120-635-2024) delivers \u003cstrong\u003eMERV 13\u003c\/strong\u003e filtration in a 4-inch-deep extended-surface minipleat design with \u003cstrong\u003e100% synthetic media\u003c\/strong\u003e, a plastic frame, and a \u003cstrong\u003efactory-installed peripheral header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThis is the same proven PL4S construction trusted in commercial HVAC — 4″ depth, all-synthetic dual-layer media, plastic frame, and minipleat geometry — with one critical addition: the peripheral header on the air-entering face. The header guides the filter into side-access housing tracks and seals against the housing gasket on installation, replacing the open-edge box-style construction with a configured fit for side-loaded AHUs. The synthetic-media advantage carries over: this filter holds up to humidity, marine and coastal air, frequent wet\/dry cycles, and aggressive face velocities where micro fiberglass paper can shed or weaken.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX PL4S Header Style is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the peripheral header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront-load holding frames that require header sealing\u003c\/strong\u003e — matches existing system design without retrofit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-moisture environments\u003c\/strong\u003e — coastal, marine, humid industrial; synthetic media doesn’t shed or weaken the way glass-fiber paper can\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity HVAC\u003c\/strong\u003e — rigid extended-surface construction in synthetic media maintains pleat geometry under turbulent airflow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) systems\u003c\/strong\u003e — reliable performance through 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\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic, extended-surface minipleat construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Plastic with factory-installed peripheral header (Header Style)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Factory-bonded to the air-entering side for side-access installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia-pack-to-frame seal:\u003c\/strong\u003e Bonded to entire frame periphery (eliminates air bypass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat, 4″ nominal depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 13 per ASHRAE 52.2-2017\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e ISO 9001 registered facility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final resistance:\u003c\/strong\u003e 1.5″ w.g.\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\u003eHeader Style vs. Box Style: which to choose\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eHeader Style\u003c\/strong\u003e (this filter) is built specifically for housings that load filters from the side and seal against a peripheral header on the air-entering face. The \u003cstrong\u003eBox Style\u003c\/strong\u003e (PL4S Box) is the standard front-loaded version used in most commercial filter slots and holding frames. Both share identical media and frame construction — the only difference is the header. Match this to your housing: if you currently run a header-style filter, replace it with the Header Style; if you run a standard box-style filter, the Box Style PL4S is the right SKU.\u003c\/p\u003e\u003ch3\u003ePL4S Header vs. PL6 Header: synthetic vs. microfiberglass\u003c\/h3\u003e\u003cp\u003eThe PL6 also offers a single-header configuration but uses micro fiberglass paper media instead of synthetic. Both header-style filters serve the same housing type; the choice comes down to environment. The \u003cstrong\u003ePL4S Header\u003c\/strong\u003e (this filter, 4″) is the right pick for high-moisture, marine, coastal, or high-velocity applications where synthetic media outperforms glass-fiber. The \u003cstrong\u003ePL6\u003c\/strong\u003e (6″) offers more dust-holding capacity and longer service life in standard dry-air commercial environments. Match depth to housing first; choose synthetic when moisture or velocity matters.\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 dimensions are slightly under nominal — standard for the industry; the filter slides into a nominal-sized slot without binding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial sizes are not available.\u003c\/strong\u003e The MicroMAX PL4S Header Style ships only in the standard sizes listed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, MicroMAX PL4S ships in full carton quantities for safe transit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe header determines the air-entering face.\u003c\/strong\u003e Unlike the box-style version, the header style has a fixed orientation — install with the header facing the airstream.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX PL4S Header Style is interchangeable with most competitive 4-inch header-style minipleat filters in the same nominal size. It is the direct synthetic-media replacement for headered glass-fiber filters in moisture-prone or high-velocity installations.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118789685370,"sku":"120-635-2024","price":468.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/koch_pl4s_header.png?v=1777660275"},{"product_id":"20x24x4-koch-micromax-pl4s-header-merv-11-120-655-2024","title":"20x24x4 Koch MicroMAX PL4S Header Style MERV 11 120-655-2024 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e20″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX PL4S Header Style\u003c\/strong\u003e filter (part number 120-655-2024) delivers \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration in a 4-inch-deep extended-surface minipleat design with \u003cstrong\u003e100% synthetic media\u003c\/strong\u003e, a plastic frame, and a \u003cstrong\u003efactory-installed peripheral header for side-access housings\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThis is the same proven PL4S construction trusted in commercial HVAC — 4″ depth, all-synthetic dual-layer media, plastic frame, and minipleat geometry — with one critical addition: the peripheral header on the air-entering face. The header guides the filter into side-access housing tracks and seals against the housing gasket on installation, replacing the open-edge box-style construction with a configured fit for side-loaded AHUs. The synthetic-media advantage carries over: this filter holds up to humidity, marine and coastal air, frequent wet\/dry cycles, and aggressive face velocities where micro fiberglass paper can shed or weaken.\u003c\/p\u003e\u003ch3\u003eWhen MicroMAX PL4S Header Style is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-access air handler housings\u003c\/strong\u003e — the peripheral header is the standard interface for side-loaded commercial AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront-load holding frames that require header sealing\u003c\/strong\u003e — matches existing system design without retrofit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-moisture environments\u003c\/strong\u003e — coastal, marine, humid industrial; synthetic media doesn’t shed or weaken the way glass-fiber paper can\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-velocity HVAC\u003c\/strong\u003e — rigid extended-surface construction in synthetic media maintains pleat geometry under turbulent airflow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume (VAV) systems\u003c\/strong\u003e — reliable performance through 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\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic, extended-surface minipleat construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Plastic with factory-installed peripheral header (Header Style)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader:\u003c\/strong\u003e Factory-bonded to the air-entering side for side-access installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia-pack-to-frame seal:\u003c\/strong\u003e Bonded to entire frame periphery (eliminates air bypass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface minipleat, 4″ nominal depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 11 per ASHRAE 52.2-2017\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e ISO 9001 registered facility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final resistance:\u003c\/strong\u003e 1.5″ w.g.\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\u003eHeader Style vs. Box Style: which to choose\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eHeader Style\u003c\/strong\u003e (this filter) is built specifically for housings that load filters from the side and seal against a peripheral header on the air-entering face. The \u003cstrong\u003eBox Style\u003c\/strong\u003e (PL4S Box) is the standard front-loaded version used in most commercial filter slots and holding frames. Both share identical media and frame construction — the only difference is the header. Match this to your housing: if you currently run a header-style filter, replace it with the Header Style; if you run a standard box-style filter, the Box Style PL4S is the right SKU.\u003c\/p\u003e\u003ch3\u003ePL4S Header vs. PL6 Header: synthetic vs. microfiberglass\u003c\/h3\u003e\u003cp\u003eThe PL6 also offers a single-header configuration but uses micro fiberglass paper media instead of synthetic. Both header-style filters serve the same housing type; the choice comes down to environment. The \u003cstrong\u003ePL4S Header\u003c\/strong\u003e (this filter, 4″) is the right pick for high-moisture, marine, coastal, or high-velocity applications where synthetic media outperforms glass-fiber. The \u003cstrong\u003ePL6\u003c\/strong\u003e (6″) offers more dust-holding capacity and longer service life in standard dry-air commercial environments. Match depth to housing first; choose synthetic when moisture or velocity matters.\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 dimensions are slightly under nominal — standard for the industry; the filter slides into a nominal-sized slot without binding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial sizes are not available.\u003c\/strong\u003e The MicroMAX PL4S Header Style ships only in the standard sizes listed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, MicroMAX PL4S ships in full carton quantities for safe transit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe header determines the air-entering face.\u003c\/strong\u003e Unlike the box-style version, the header style has a fixed orientation — install with the header facing the airstream.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThe MicroMAX PL4S Header Style is interchangeable with most competitive 4-inch header-style minipleat filters in the same nominal size. It is the direct synthetic-media replacement for headered glass-fiber filters in moisture-prone or high-velocity installations.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118789980282,"sku":"120-655-2024","price":461.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/koch_pl4s_header.png?v=1777660275"}],"url":"https:\/\/www.rememberthefilter.com\/collections\/20x24x4-furnace-and-ac-filters.oembed?page=3","provider":"RememberTheFilter.com","version":"1.0","type":"link"}