{"title":"Koch Multi-Test Cartridge Filters | OEM Equipment Replacement","description":"\u003cp\u003eKoch \u003cstrong\u003eMulti-Test\u003c\/strong\u003e cartridge filters — the OEM cartridge replacement line for industrial dust collection, gas turbine inlet, and specialty cartridge-housing applications. \u003cstrong\u003eMulti-Test MT\u003c\/strong\u003e standard cartridges, \u003cstrong\u003eMulti-Test Rigid\u003c\/strong\u003e heavy-duty cartridges, and configurations cross-referenced to common OEM spec sheets across Donaldson, Filter1, Camfil, and other industrial cartridge platforms. Cross-referencing is part of our service: if you have an OEM model number from a piece of equipment that nobody else will quote, send it to us with dimensions and we'll route it through Koch engineering to identify the equivalent Multi-Test SKU.\u003c\/p\u003e","products":[{"product_id":"koch-multi-test-mt-20-50-merv-8-cartridge-filter","title":"Koch Multi-Test MT 20\/50 (~MERV 8) Cartridge Filter for Farr HP Basket Frames - Sold by the Case","description":"\u003cp\u003eThe Koch \u003cstrong\u003eMulti-Test MT 20\/50 Cartridge Filter\u003c\/strong\u003e is an extended-surface synthetic cartridge engineered as a \u003cstrong\u003edrop-in replacement for Farr HP basket framework\u003c\/strong\u003e without housing modification. The MT 20\/50 tier delivers \u003cstrong\u003e20-30% dust spot \/ 50% arrestance\u003c\/strong\u003e per ASHRAE 52.1, which corresponds to approximately \u003cstrong\u003eMERV 8\u003c\/strong\u003e per the modern ASHRAE 52.2 test standard. Specified for prefilter and equipment-protection efficiency in Farr HP basket frames.\u003c\/p\u003e\u003ch3\u003eWhat you get: sold by the case\u003c\/h3\u003e\u003cp\u003eMulti-Test cartridges are \u003cstrong\u003esold by the case\u003c\/strong\u003e, not individually. The price you see for each variant is the \u003cstrong\u003efull case price\u003c\/strong\u003e, and each variant label tells you exactly how many filters are in that case. Case counts vary by size:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x8\u003c\/strong\u003e — available by quote (typical case quantity: 12 per case). \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e for current pricing and availability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16x20x8\u003c\/strong\u003e — \u003cstrong\u003e12 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20x20x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20x25x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x12\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x12\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x24\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x24\u003c\/strong\u003e — available by quote (typical case quantity: 5 per case). \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e for current pricing and availability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed a partial case, individual filter pricing, or a different quantity than the standard case? Per Koch policy, carton quantities are approximations and we can adjust on quoted orders — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e with your exact count and we’ll work out the pricing.\u003c\/p\u003e\u003ch3\u003eFarr HP basket replacement\u003c\/h3\u003e\u003cp\u003eIf your facility uses \u003cstrong\u003eFarr HP basket framework\u003c\/strong\u003e, the Multi-Test cartridge is a direct sourcing option. Koch engineered Multi-Test cartridges to drop into existing Farr HP baskets without any housing modification — same dimensions, same collapsible cartridge geometry. Multi-Test cartridges are \u003cstrong\u003ecollapsible replacement cartridges\u003c\/strong\u003e, which lets the cartridge fold compactly for transport and storage and then expand to fill the Farr HP basket on installation.\u003c\/p\u003e\u003cp\u003eThis product line gives facilities running Farr HP equipment an alternative supplier for ongoing changeouts, particularly important when OEM Farr HP cartridges become difficult to source or quote.\u003c\/p\u003e\u003ch3\u003eWhy \"MT MT 20\/50\" naming — ASHRAE 52.1 vs 52.2\u003c\/h3\u003e\u003cp\u003eThe Multi-Test product line predates the modern \u003cstrong\u003eASHRAE 52.2 (MERV)\u003c\/strong\u003e rating system — the four MT tiers (20\/50, 50\/60, 80\/90, 90\/95) are named with the older \u003cstrong\u003eASHRAE 52.1 dual-metric efficiency designations\u003c\/strong\u003e. The first number is approximate dust spot efficiency; the second is approximate arrestance.\u003c\/p\u003e\u003cp\u003eFor specifying engineers and modern HVAC documentation, here’s the approximate MERV correspondence used in industry:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 20\/50\u003c\/strong\u003e → approximately MERV 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 50\/60\u003c\/strong\u003e → approximately MERV 11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 80\/90\u003c\/strong\u003e → approximately MERV 13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 90\/95\u003c\/strong\u003e → approximately MERV 14\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor applications requiring formal MERV documentation against the 52.2 standard, reference Koch bulletin K 1187 or contact us for the latest spec sheet.\u003c\/p\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface collapsible cartridge filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Synthetic high-efficiency media (collapsible construction)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame compatibility:\u003c\/strong\u003e Farr HP basket framework (drop-in, no modification required). Baskets sold separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e 20-30% dust spot \/ 50% arrestance per ASHRAE 52.1; approximately MERV 8 per ASHRAE 52.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference bulletin:\u003c\/strong\u003e Koch K 1187\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold by the case.\u003c\/strong\u003e Each variant label shows the exact number of filters in that case (see \"What you get\" above). Variant price is the case price.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhen the Multi-Test MT 20\/50 is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFarr HP basket prefilter stage\u003c\/strong\u003e — ahead of higher-efficiency MT cartridges or dedicated final filters in multi-stage systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquipment protection\u003c\/strong\u003e — protect blowers, coils, and downstream filters from coarse particles in Farr HP-equipped AHUs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCost-sensitive commercial HVAC\u003c\/strong\u003e with Farr HP basket frames where MERV 8-equivalent capture meets the spec\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-airflow applications\u003c\/strong\u003e where pressure drop is the limiting factor and the system can’t support higher MERV restriction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat ~MERV 8 captures\u003c\/h3\u003e\u003cp\u003eCaptures dust mite debris, pollen, mold spores, pet dander, and most household and office airborne dust. Standard high-efficiency target for commercial HVAC final filtration.\u003c\/p\u003e\u003ch3\u003eChoosing across the Multi-Test line\u003c\/h3\u003e\u003cp\u003eKoch offers four efficiency tiers in the Multi-Test cartridge line, all designed to fit Farr HP basket framework:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 20\/50 (this product) (~MERV 8):\u003c\/strong\u003e 20-30% dust spot efficiency. For prefilter and equipment protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 50\/60 (~MERV 11):\u003c\/strong\u003e 45-55% dust spot efficiency. For mid-efficiency commercial HVAC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 80\/90 (~MERV 13):\u003c\/strong\u003e 80-90% dust spot efficiency. For high-IAQ commercial and healthcare.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 90\/95 (~MERV 14):\u003c\/strong\u003e 90-95% dust spot efficiency. For near-HEPA secondary, pharma, labs, HEPA pre-stage.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf your application calls for a different efficiency, see the matching sister product. All four tiers share the same collapsible cartridge geometry and Farr HP-compatible fitment — the difference is just which efficiency tier matches your design spec.\u003c\/p\u003e\u003ch3\u003eSizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecify both face dimensions and depth.\u003c\/strong\u003e Cartridges are sized as Width x Height x Depth (e.g., 24x24x12). Match all three dimensions to your Farr HP basket — cartridges cannot be cut or trimmed in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach variant shows its case quantity in the dropdown label.\u003c\/strong\u003e Look for \"(Case of N)\" next to each size — that’s how many filters are in the case at that price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaskets sold separately.\u003c\/strong\u003e The Multi-Test is a replacement cartridge for existing Farr HP framework. If you need new baskets or supporting hardware, contact us for compatible options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarton quantities are approximations.\u003c\/strong\u003e Per Koch policy, please state the exact number of filters required when ordering — we can adjust for partial cases on quoted orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\"Call for Quote\" sizes:\u003c\/strong\u003e Some sizes are catalog items but require direct quoting due to lower order volume or build-to-order production. These show \"(Call for Quote)\" in the variant dropdown — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e for these sizes or for facility-scale orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeed a Cambridge Hi-Cap or Side-Cap replacement instead?\u003c\/strong\u003e See the Koch Duo-Cap line for the Cambridge equivalent. Different basket framework, same drop-in replacement strategy.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Koch","offers":[{"title":"12x24x8 (Call for Quote)","offer_id":44118932029562,"sku":"107-703-001","price":0.0,"currency_code":"USD","in_stock":false},{"title":"16x20x8 (Case of 12)","offer_id":44118932062330,"sku":"107-703-002","price":501.96,"currency_code":"USD","in_stock":true},{"title":"20x20x8 (Case of 10)","offer_id":44118932095098,"sku":"107-703-003","price":438.2,"currency_code":"USD","in_stock":true},{"title":"20x25x8 (Case of 10)","offer_id":44118932127866,"sku":"107-703-004","price":483.5,"currency_code":"USD","in_stock":true},{"title":"24x24x8 (Case of 10)","offer_id":44118932160634,"sku":"107-703-005","price":496.7,"currency_code":"USD","in_stock":true},{"title":"12x24x12 (Case of 10)","offer_id":44118932193402,"sku":"107-703-006","price":484.9,"currency_code":"USD","in_stock":true},{"title":"24x24x12 (Case of 10)","offer_id":44118932226170,"sku":"107-703-007","price":545.4,"currency_code":"USD","in_stock":true},{"title":"12x24x24 (Case of 10)","offer_id":44118932258938,"sku":"107-703-008","price":515.4,"currency_code":"USD","in_stock":true},{"title":"24x24x24 (Call for Quote)","offer_id":44118932291706,"sku":"107-703-009","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/Multi-Test-Cartridge_getimage2_1-213_8f628cf2-79d4-4b0e-8d08-4e752ba5c185.jpg?v=1777741281"},{"product_id":"koch-multi-test-mt-50-60-merv-11-cartridge-filter","title":"Koch Multi-Test MT 50\/60 (~MERV 11) Cartridge Filter for Farr HP Basket Frames - Sold by the Case","description":"\u003cp\u003eThe Koch \u003cstrong\u003eMulti-Test MT 50\/60 Cartridge Filter\u003c\/strong\u003e is an extended-surface synthetic cartridge engineered as a \u003cstrong\u003edrop-in replacement for Farr HP basket framework\u003c\/strong\u003e without housing modification. The MT 50\/60 tier delivers \u003cstrong\u003e45-55% dust spot \/ 60% arrestance\u003c\/strong\u003e per ASHRAE 52.1, which corresponds to approximately \u003cstrong\u003eMERV 11\u003c\/strong\u003e per the modern ASHRAE 52.2 test standard. Specified for mid-efficiency final filtration in commercial HVAC with Farr HP basket frames.\u003c\/p\u003e\u003ch3\u003eWhat you get: sold by the case\u003c\/h3\u003e\u003cp\u003eMulti-Test cartridges are \u003cstrong\u003esold by the case\u003c\/strong\u003e, not individually. The price you see for each variant is the \u003cstrong\u003efull case price\u003c\/strong\u003e, and each variant label tells you exactly how many filters are in that case. Case counts vary by size:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x8\u003c\/strong\u003e — available by quote (typical case quantity: 12 per case). \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e for current pricing and availability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16x20x8\u003c\/strong\u003e — \u003cstrong\u003e12 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20x20x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20x25x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x12\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x12\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x24\u003c\/strong\u003e — available by quote (typical case quantity: 5 per case). \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e for current pricing and availability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x24\u003c\/strong\u003e — available by quote (typical case quantity: 5 per case). \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e for current pricing and availability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed a partial case, individual filter pricing, or a different quantity than the standard case? Per Koch policy, carton quantities are approximations and we can adjust on quoted orders — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e with your exact count and we’ll work out the pricing.\u003c\/p\u003e\u003ch3\u003eFarr HP basket replacement\u003c\/h3\u003e\u003cp\u003eIf your facility uses \u003cstrong\u003eFarr HP basket framework\u003c\/strong\u003e, the Multi-Test cartridge is a direct sourcing option. Koch engineered Multi-Test cartridges to drop into existing Farr HP baskets without any housing modification — same dimensions, same collapsible cartridge geometry. Multi-Test cartridges are \u003cstrong\u003ecollapsible replacement cartridges\u003c\/strong\u003e, which lets the cartridge fold compactly for transport and storage and then expand to fill the Farr HP basket on installation.\u003c\/p\u003e\u003cp\u003eThis product line gives facilities running Farr HP equipment an alternative supplier for ongoing changeouts, particularly important when OEM Farr HP cartridges become difficult to source or quote.\u003c\/p\u003e\u003ch3\u003eWhy \"MT MT 50\/60\" naming — ASHRAE 52.1 vs 52.2\u003c\/h3\u003e\u003cp\u003eThe Multi-Test product line predates the modern \u003cstrong\u003eASHRAE 52.2 (MERV)\u003c\/strong\u003e rating system — the four MT tiers (20\/50, 50\/60, 80\/90, 90\/95) are named with the older \u003cstrong\u003eASHRAE 52.1 dual-metric efficiency designations\u003c\/strong\u003e. The first number is approximate dust spot efficiency; the second is approximate arrestance.\u003c\/p\u003e\u003cp\u003eFor specifying engineers and modern HVAC documentation, here’s the approximate MERV correspondence used in industry:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 20\/50\u003c\/strong\u003e → approximately MERV 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 50\/60\u003c\/strong\u003e → approximately MERV 11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 80\/90\u003c\/strong\u003e → approximately MERV 13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 90\/95\u003c\/strong\u003e → approximately MERV 14\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor applications requiring formal MERV documentation against the 52.2 standard, reference Koch bulletin K 1187 or contact us for the latest spec sheet.\u003c\/p\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface collapsible cartridge filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Synthetic high-efficiency media (collapsible construction)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame compatibility:\u003c\/strong\u003e Farr HP basket framework (drop-in, no modification required). Baskets sold separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e 45-55% dust spot \/ 60% arrestance per ASHRAE 52.1; approximately MERV 11 per ASHRAE 52.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference bulletin:\u003c\/strong\u003e Koch K 1187\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold by the case.\u003c\/strong\u003e Each variant label shows the exact number of filters in that case (see \"What you get\" above). Variant price is the case price.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhen the Multi-Test MT 50\/60 is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMid-efficiency commercial HVAC\u003c\/strong\u003e — office buildings, schools, hotels, retail with Farr HP basket frames where ~MERV 11 capture is the design target\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight-industrial systems\u003c\/strong\u003e with Farr HP equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHealthcare and laboratory pre-filtration\u003c\/strong\u003e — ahead of MERV 13+ final stages in Farr HP basket frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume systems\u003c\/strong\u003e where the cartridge form factor handles airflow swings well\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. Strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eChoosing across the Multi-Test line\u003c\/h3\u003e\u003cp\u003eKoch offers four efficiency tiers in the Multi-Test cartridge line, all designed to fit Farr HP basket framework:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 20\/50 (~MERV 8):\u003c\/strong\u003e 20-30% dust spot efficiency. For prefilter and equipment protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 50\/60 (this product) (~MERV 11):\u003c\/strong\u003e 45-55% dust spot efficiency. For mid-efficiency commercial HVAC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 80\/90 (~MERV 13):\u003c\/strong\u003e 80-90% dust spot efficiency. For high-IAQ commercial and healthcare.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 90\/95 (~MERV 14):\u003c\/strong\u003e 90-95% dust spot efficiency. For near-HEPA secondary, pharma, labs, HEPA pre-stage.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf your application calls for a different efficiency, see the matching sister product. All four tiers share the same collapsible cartridge geometry and Farr HP-compatible fitment — the difference is just which efficiency tier matches your design spec.\u003c\/p\u003e\u003ch3\u003eSizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecify both face dimensions and depth.\u003c\/strong\u003e Cartridges are sized as Width x Height x Depth (e.g., 24x24x12). Match all three dimensions to your Farr HP basket — cartridges cannot be cut or trimmed in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach variant shows its case quantity in the dropdown label.\u003c\/strong\u003e Look for \"(Case of N)\" next to each size — that’s how many filters are in the case at that price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaskets sold separately.\u003c\/strong\u003e The Multi-Test is a replacement cartridge for existing Farr HP framework. If you need new baskets or supporting hardware, contact us for compatible options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarton quantities are approximations.\u003c\/strong\u003e Per Koch policy, please state the exact number of filters required when ordering — we can adjust for partial cases on quoted orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\"Call for Quote\" sizes:\u003c\/strong\u003e Some sizes are catalog items but require direct quoting due to lower order volume or build-to-order production. These show \"(Call for Quote)\" in the variant dropdown — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e for these sizes or for facility-scale orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeed a Cambridge Hi-Cap or Side-Cap replacement instead?\u003c\/strong\u003e See the Koch Duo-Cap line for the Cambridge equivalent. Different basket framework, same drop-in replacement strategy.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Koch","offers":[{"title":"12x24x8 (Call for Quote)","offer_id":44118932324474,"sku":"107-702-001","price":0.0,"currency_code":"USD","in_stock":false},{"title":"16x20x8 (Case of 12)","offer_id":44118932357242,"sku":"107-702-002","price":687.0,"currency_code":"USD","in_stock":true},{"title":"20x20x8 (Case of 10)","offer_id":44118932390010,"sku":"107-702-003","price":695.2,"currency_code":"USD","in_stock":true},{"title":"20x25x8 (Case of 10)","offer_id":44118932422778,"sku":"107-702-004","price":698.7,"currency_code":"USD","in_stock":true},{"title":"24x24x8 (Case of 10)","offer_id":44118932455546,"sku":"107-702-005","price":709.0,"currency_code":"USD","in_stock":true},{"title":"12x24x12 (Case of 10)","offer_id":44118932488314,"sku":"107-702-006","price":595.0,"currency_code":"USD","in_stock":true},{"title":"24x24x12 (Case of 10)","offer_id":44118932521082,"sku":"107-702-007","price":884.9,"currency_code":"USD","in_stock":true},{"title":"12x24x24 (Call for Quote)","offer_id":44118932553850,"sku":"107-702-008","price":0.0,"currency_code":"USD","in_stock":false},{"title":"24x24x24 (Call for Quote)","offer_id":44118932586618,"sku":"107-702-009","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/Multi-Test-Cartridge_getimage2_1-213.jpg?v=1777741284"},{"product_id":"koch-multi-test-mt-80-90-merv-13-cartridge-filter","title":"Koch Multi-Test MT 80\/90 (~MERV 13) Cartridge Filter for Farr HP Basket Frames - Sold by the Case","description":"\u003cp\u003eThe Koch \u003cstrong\u003eMulti-Test MT 80\/90 Cartridge Filter\u003c\/strong\u003e is an extended-surface synthetic cartridge engineered as a \u003cstrong\u003edrop-in replacement for Farr HP basket framework\u003c\/strong\u003e without housing modification. The MT 80\/90 tier delivers \u003cstrong\u003e80-90% dust spot efficiency\u003c\/strong\u003e per ASHRAE 52.1, which corresponds to approximately \u003cstrong\u003eMERV 13\u003c\/strong\u003e per the modern ASHRAE 52.2 test standard. Specified for high-efficiency final filtration in healthcare, pharmaceutical, and high-IAQ commercial systems.\u003c\/p\u003e\u003ch3\u003eWhat you get: sold by the case\u003c\/h3\u003e\u003cp\u003eMulti-Test cartridges are \u003cstrong\u003esold by the case\u003c\/strong\u003e, not individually. The price you see for each variant is the \u003cstrong\u003efull case price\u003c\/strong\u003e, and each variant label tells you exactly how many filters are in that case. Case counts vary by size:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x8\u003c\/strong\u003e — \u003cstrong\u003e12 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16x20x8\u003c\/strong\u003e — \u003cstrong\u003e12 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20x20x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20x25x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x12\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x12\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x24\u003c\/strong\u003e — available by quote (typical case quantity: 5 per case). \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e for current pricing and availability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x24\u003c\/strong\u003e — \u003cstrong\u003e5 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed a partial case, individual filter pricing, or a different quantity than the standard case? Per Koch policy, carton quantities are approximations and we can adjust on quoted orders — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e with your exact count and we’ll work out the pricing.\u003c\/p\u003e\u003ch3\u003eFarr HP basket replacement\u003c\/h3\u003e\u003cp\u003eIf your facility uses \u003cstrong\u003eFarr HP basket framework\u003c\/strong\u003e, the Multi-Test cartridge is a direct sourcing option. Koch engineered Multi-Test cartridges to drop into existing Farr HP baskets without any housing modification — same dimensions, same collapsible cartridge geometry. Multi-Test cartridges are \u003cstrong\u003ecollapsible replacement cartridges\u003c\/strong\u003e, which lets the cartridge fold compactly for transport and storage and then expand to fill the Farr HP basket on installation.\u003c\/p\u003e\u003cp\u003eThis product line gives facilities running Farr HP equipment an alternative supplier for ongoing changeouts, particularly important when OEM Farr HP cartridges become difficult to source or quote.\u003c\/p\u003e\u003ch3\u003eWhy \"MT MT 80\/90\" naming — ASHRAE 52.1 vs 52.2\u003c\/h3\u003e\u003cp\u003eThe Multi-Test product line predates the modern \u003cstrong\u003eASHRAE 52.2 (MERV)\u003c\/strong\u003e rating system — the four MT tiers (20\/50, 50\/60, 80\/90, 90\/95) are named with the older \u003cstrong\u003eASHRAE 52.1 dual-metric efficiency designations\u003c\/strong\u003e. The first number is approximate dust spot efficiency; the second is approximate arrestance.\u003c\/p\u003e\u003cp\u003eFor specifying engineers and modern HVAC documentation, here’s the approximate MERV correspondence used in industry:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 20\/50\u003c\/strong\u003e → approximately MERV 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 50\/60\u003c\/strong\u003e → approximately MERV 11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 80\/90\u003c\/strong\u003e → approximately MERV 13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 90\/95\u003c\/strong\u003e → approximately MERV 14\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor applications requiring formal MERV documentation against the 52.2 standard, reference Koch bulletin K 1187 or contact us for the latest spec sheet.\u003c\/p\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface collapsible cartridge filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Synthetic high-efficiency media (collapsible construction)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame compatibility:\u003c\/strong\u003e Farr HP basket framework (drop-in, no modification required). Baskets sold separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e 80-90% dust spot efficiency per ASHRAE 52.1; approximately MERV 13 per ASHRAE 52.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference bulletin:\u003c\/strong\u003e Koch K 1187\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold by the case.\u003c\/strong\u003e Each variant label shows the exact number of filters in that case (see \"What you get\" above). Variant price is the case price.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhen the Multi-Test MT 80\/90 is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHealthcare facilities\u003c\/strong\u003e — hospitals, surgical preparation areas, clinics with Farr HP basket frames where ~MERV 13 capture is required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaboratory and pharmaceutical environments\u003c\/strong\u003e with Farr HP equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-IAQ commercial buildings\u003c\/strong\u003e — high-occupancy facilities, schools with respiratory health priorities\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHEPA pre-stage filtration\u003c\/strong\u003e in critical-environment air handlers using Farr HP framework\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial process protection\u003c\/strong\u003e where fine-particle capture matters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat ~MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and respiratory droplets. Used in healthcare, clinics, laboratories, and high-IAQ commercial buildings where fine-particle capture matters.\u003c\/p\u003e\u003ch3\u003eChoosing across the Multi-Test line\u003c\/h3\u003e\u003cp\u003eKoch offers four efficiency tiers in the Multi-Test cartridge line, all designed to fit Farr HP basket framework:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 20\/50 (~MERV 8):\u003c\/strong\u003e 20-30% dust spot efficiency. For prefilter and equipment protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 50\/60 (~MERV 11):\u003c\/strong\u003e 45-55% dust spot efficiency. For mid-efficiency commercial HVAC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 80\/90 (this product) (~MERV 13):\u003c\/strong\u003e 80-90% dust spot efficiency. For high-IAQ commercial and healthcare.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 90\/95 (~MERV 14):\u003c\/strong\u003e 90-95% dust spot efficiency. For near-HEPA secondary, pharma, labs, HEPA pre-stage.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf your application calls for a different efficiency, see the matching sister product. All four tiers share the same collapsible cartridge geometry and Farr HP-compatible fitment — the difference is just which efficiency tier matches your design spec.\u003c\/p\u003e\u003ch3\u003eSizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecify both face dimensions and depth.\u003c\/strong\u003e Cartridges are sized as Width x Height x Depth (e.g., 24x24x12). Match all three dimensions to your Farr HP basket — cartridges cannot be cut or trimmed in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach variant shows its case quantity in the dropdown label.\u003c\/strong\u003e Look for \"(Case of N)\" next to each size — that’s how many filters are in the case at that price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaskets sold separately.\u003c\/strong\u003e The Multi-Test is a replacement cartridge for existing Farr HP framework. If you need new baskets or supporting hardware, contact us for compatible options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarton quantities are approximations.\u003c\/strong\u003e Per Koch policy, please state the exact number of filters required when ordering — we can adjust for partial cases on quoted orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\"Call for Quote\" sizes:\u003c\/strong\u003e Some sizes are catalog items but require direct quoting due to lower order volume or build-to-order production. These show \"(Call for Quote)\" in the variant dropdown — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e for these sizes or for facility-scale orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeed a Cambridge Hi-Cap or Side-Cap replacement instead?\u003c\/strong\u003e See the Koch Duo-Cap line for the Cambridge equivalent. Different basket framework, same drop-in replacement strategy.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Koch","offers":[{"title":"12x24x8 (Case of 12)","offer_id":44118932619386,"sku":"107-701-001","price":705.48,"currency_code":"USD","in_stock":true},{"title":"16x20x8 (Case of 12)","offer_id":44118932652154,"sku":"107-701-002","price":752.4,"currency_code":"USD","in_stock":true},{"title":"20x20x8 (Case of 10)","offer_id":44118932684922,"sku":"107-701-003","price":702.8,"currency_code":"USD","in_stock":true},{"title":"20x25x8 (Case of 10)","offer_id":44118932717690,"sku":"107-701-004","price":789.7,"currency_code":"USD","in_stock":true},{"title":"24x24x8 (Case of 10)","offer_id":44118932750458,"sku":"107-701-005","price":780.7,"currency_code":"USD","in_stock":true},{"title":"12x24x12 (Case of 10)","offer_id":44118932783226,"sku":"107-701-006","price":696.7,"currency_code":"USD","in_stock":true},{"title":"24x24x12 (Case of 10)","offer_id":44118932815994,"sku":"107-701-007","price":962.9,"currency_code":"USD","in_stock":true},{"title":"12x24x24 (Call for Quote)","offer_id":44118932848762,"sku":"107-701-008","price":0.0,"currency_code":"USD","in_stock":false},{"title":"24x24x24 (Case of 5)","offer_id":44118932881530,"sku":"107-701-009","price":771.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/Multi-Test-Cartridge_getimage2_1-213_5ca486a0-35c9-41b9-83fb-2eb91957b7d5.jpg?v=1777741288"},{"product_id":"koch-multi-test-mt-90-95-merv-14-cartridge-filter","title":"Koch Multi-Test MT 90\/95 (~MERV 14) Cartridge Filter for Farr HP Basket Frames - Sold by the Case","description":"\u003cp\u003eThe Koch \u003cstrong\u003eMulti-Test MT 90\/95 Cartridge Filter\u003c\/strong\u003e is an extended-surface synthetic cartridge engineered as a \u003cstrong\u003edrop-in replacement for Farr HP basket framework\u003c\/strong\u003e without housing modification. The MT 90\/95 tier delivers \u003cstrong\u003e90-95% dust spot efficiency\u003c\/strong\u003e per ASHRAE 52.1, which corresponds to approximately \u003cstrong\u003eMERV 14\u003c\/strong\u003e per the modern ASHRAE 52.2 test standard. Specified for near-HEPA secondary filtration in critical applications and HEPA pre-stage installations.\u003c\/p\u003e\u003ch3\u003eWhat you get: sold by the case\u003c\/h3\u003e\u003cp\u003eMulti-Test cartridges are \u003cstrong\u003esold by the case\u003c\/strong\u003e, not individually. The price you see for each variant is the \u003cstrong\u003efull case price\u003c\/strong\u003e, and each variant label tells you exactly how many filters are in that case. Case counts vary by size:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x8\u003c\/strong\u003e — available by quote (typical case quantity: 12 per case). \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e for current pricing and availability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16x20x8\u003c\/strong\u003e — \u003cstrong\u003e12 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20x20x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20x25x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x8\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x12\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x12\u003c\/strong\u003e — \u003cstrong\u003e10 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12x24x24\u003c\/strong\u003e — available by quote (typical case quantity: 5 per case). \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e for current pricing and availability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24x24x24\u003c\/strong\u003e — \u003cstrong\u003e5 filters per case\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed a partial case, individual filter pricing, or a different quantity than the standard case? Per Koch policy, carton quantities are approximations and we can adjust on quoted orders — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e with your exact count and we’ll work out the pricing.\u003c\/p\u003e\u003ch3\u003eFarr HP basket replacement\u003c\/h3\u003e\u003cp\u003eIf your facility uses \u003cstrong\u003eFarr HP basket framework\u003c\/strong\u003e, the Multi-Test cartridge is a direct sourcing option. Koch engineered Multi-Test cartridges to drop into existing Farr HP baskets without any housing modification — same dimensions, same collapsible cartridge geometry. Multi-Test cartridges are \u003cstrong\u003ecollapsible replacement cartridges\u003c\/strong\u003e, which lets the cartridge fold compactly for transport and storage and then expand to fill the Farr HP basket on installation.\u003c\/p\u003e\u003cp\u003eThis product line gives facilities running Farr HP equipment an alternative supplier for ongoing changeouts, particularly important when OEM Farr HP cartridges become difficult to source or quote.\u003c\/p\u003e\u003ch3\u003eWhy \"MT MT 90\/95\" naming — ASHRAE 52.1 vs 52.2\u003c\/h3\u003e\u003cp\u003eThe Multi-Test product line predates the modern \u003cstrong\u003eASHRAE 52.2 (MERV)\u003c\/strong\u003e rating system — the four MT tiers (20\/50, 50\/60, 80\/90, 90\/95) are named with the older \u003cstrong\u003eASHRAE 52.1 dual-metric efficiency designations\u003c\/strong\u003e. The first number is approximate dust spot efficiency; the second is approximate arrestance.\u003c\/p\u003e\u003cp\u003eFor specifying engineers and modern HVAC documentation, here’s the approximate MERV correspondence used in industry:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 20\/50\u003c\/strong\u003e → approximately MERV 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 50\/60\u003c\/strong\u003e → approximately MERV 11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 80\/90\u003c\/strong\u003e → approximately MERV 13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 90\/95\u003c\/strong\u003e → approximately MERV 14\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor applications requiring formal MERV documentation against the 52.2 standard, reference Koch bulletin K 1187 or contact us for the latest spec sheet.\u003c\/p\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Extended-surface collapsible cartridge filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Synthetic high-efficiency media (collapsible construction)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame compatibility:\u003c\/strong\u003e Farr HP basket framework (drop-in, no modification required). Baskets sold separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e 90-95% dust spot efficiency per ASHRAE 52.1; approximately MERV 14 per ASHRAE 52.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference bulletin:\u003c\/strong\u003e Koch K 1187\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold by the case.\u003c\/strong\u003e Each variant label shows the exact number of filters in that case (see \"What you get\" above). Variant price is the case price.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhen the Multi-Test MT 90\/95 is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePharmaceutical and clinical applications\u003c\/strong\u003e — manufacturing, compounding, labs with Farr HP basket frames where ~MERV 14 capture is required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurgical and procedural spaces\u003c\/strong\u003e with Farr HP equipment as a final filter or HEPA pre-stage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHEPA pre-stage filtration\u003c\/strong\u003e — protects expensive HEPA final filters from premature loading, extending HEPA service life dramatically\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCleanroom installations\u003c\/strong\u003e using Farr HP basket framework\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCritical-environment commercial buildings\u003c\/strong\u003e — research facilities, university labs, biotech\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat ~MERV 14 captures\u003c\/h3\u003e\u003cp\u003eCaptures most sub-micron particles, fine smoke, bacteria, and many viruses. Used in hospitals, surgical and procedural spaces, pharmaceutical environments, and as a pre-filter ahead of HEPA stages in cleanroom and laboratory installations.\u003c\/p\u003e\u003ch3\u003eChoosing across the Multi-Test line\u003c\/h3\u003e\u003cp\u003eKoch offers four efficiency tiers in the Multi-Test cartridge line, all designed to fit Farr HP basket framework:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 20\/50 (~MERV 8):\u003c\/strong\u003e 20-30% dust spot efficiency. For prefilter and equipment protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 50\/60 (~MERV 11):\u003c\/strong\u003e 45-55% dust spot efficiency. For mid-efficiency commercial HVAC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 80\/90 (~MERV 13):\u003c\/strong\u003e 80-90% dust spot efficiency. For high-IAQ commercial and healthcare.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMT 90\/95 (this product) (~MERV 14):\u003c\/strong\u003e 90-95% dust spot efficiency. For near-HEPA secondary, pharma, labs, HEPA pre-stage.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf your application calls for a different efficiency, see the matching sister product. All four tiers share the same collapsible cartridge geometry and Farr HP-compatible fitment — the difference is just which efficiency tier matches your design spec.\u003c\/p\u003e\u003ch3\u003eSizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecify both face dimensions and depth.\u003c\/strong\u003e Cartridges are sized as Width x Height x Depth (e.g., 24x24x12). Match all three dimensions to your Farr HP basket — cartridges cannot be cut or trimmed in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach variant shows its case quantity in the dropdown label.\u003c\/strong\u003e Look for \"(Case of N)\" next to each size — that’s how many filters are in the case at that price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaskets sold separately.\u003c\/strong\u003e The Multi-Test is a replacement cartridge for existing Farr HP framework. If you need new baskets or supporting hardware, contact us for compatible options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarton quantities are approximations.\u003c\/strong\u003e Per Koch policy, please state the exact number of filters required when ordering — we can adjust for partial cases on quoted orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\"Call for Quote\" sizes:\u003c\/strong\u003e Some sizes are catalog items but require direct quoting due to lower order volume or build-to-order production. These show \"(Call for Quote)\" in the variant dropdown — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e for these sizes or for facility-scale orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeed a Cambridge Hi-Cap or Side-Cap replacement instead?\u003c\/strong\u003e See the Koch Duo-Cap line for the Cambridge equivalent. Different basket framework, same drop-in replacement strategy.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Koch","offers":[{"title":"12x24x8 (Call for Quote)","offer_id":44118932914298,"sku":"107-700-001","price":0.0,"currency_code":"USD","in_stock":false},{"title":"16x20x8 (Case of 12)","offer_id":44118932947066,"sku":"107-700-002","price":892.92,"currency_code":"USD","in_stock":true},{"title":"20x20x8 (Case of 10)","offer_id":44118932979834,"sku":"107-700-003","price":763.5,"currency_code":"USD","in_stock":true},{"title":"20x25x8 (Case of 10)","offer_id":44118933012602,"sku":"107-700-004","price":861.4,"currency_code":"USD","in_stock":true},{"title":"24x24x8 (Case of 10)","offer_id":44118933045370,"sku":"107-700-005","price":841.1,"currency_code":"USD","in_stock":true},{"title":"12x24x12 (Case of 10)","offer_id":44118933078138,"sku":"107-700-006","price":759.9,"currency_code":"USD","in_stock":true},{"title":"24x24x12 (Case of 10)","offer_id":44118933110906,"sku":"107-700-007","price":1081.0,"currency_code":"USD","in_stock":true},{"title":"12x24x24 (Call for Quote)","offer_id":44118933143674,"sku":"107-700-008","price":0.0,"currency_code":"USD","in_stock":false},{"title":"24x24x24 (Case of 5)","offer_id":44118933176442,"sku":"107-700-009","price":945.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/Multi-Test-Cartridge_getimage2_1-213_f31bfd5a-ee07-4b57-9d2d-91a9532c8b61.jpg?v=1777741292"},{"product_id":"koch-multi-test-rigid-mtr-95-merv-14-cartridge","title":"Koch Multi-Test Rigid MTR 95 (MERV 14) Self-Supported Cartridge Filter","description":"\u003cp\u003eThe Koch \u003cstrong\u003eMulti-Test Rigid MTR 95 Cartridge\u003c\/strong\u003e is a \u003cstrong\u003erigid self-supported extended-surface filter\u003c\/strong\u003e that drops directly into the air handler housing — \u003cstrong\u003eno basket framework required\u003c\/strong\u003e. The rigid construction holds the cartridge geometry on its own, so the filter can be installed in housings that don’t have an existing basket or in systems where the original basket has been removed. The MTR 95 tier delivers \u003cstrong\u003e95% dust spot efficiency\u003c\/strong\u003e per ASHRAE 52.1, which corresponds to approximately \u003cstrong\u003eMERV 14\u003c\/strong\u003e per the modern ASHRAE 52.2 test standard. Specified for high-efficiency final filtration in healthcare, pharmaceutical, and laboratory clean spaces.\u003c\/p\u003e\u003ch3\u003eRigid self-supported design (no basket required)\u003c\/h3\u003e\u003cp\u003eThis is the critical differentiator for the Multi-Test Rigid line: \u003cstrong\u003ethe cartridge supports itself\u003c\/strong\u003e. The frame and media construction hold their shape under airflow without external bracing. That means:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo basket framework needed.\u003c\/strong\u003e The cartridge installs directly into the housing — useful when the original equipment basket is missing, damaged, or wasn’t part of the original specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect compatibility\u003c\/strong\u003e with side-access housings, top-load cabinets, and front-load AHU racks that don’t use Cambridge or Farr-style baskets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplified installation\u003c\/strong\u003e — one component to install, replace, and dispose of. No basket cleaning or basket replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable geometry under airflow\u003c\/strong\u003e — the rigid construction won’t collapse or distort under high-velocity airflow or pressure spikes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor applications that \u003cem\u003edo\u003c\/em\u003e have Farr HP basket framework already installed, see the \u003cstrong\u003eMulti-Test Cartridge\u003c\/strong\u003e line (collapsible cartridges designed to fit Farr HP baskets). For Cambridge Hi-Cap and Side-Cap framework, see the \u003cstrong\u003eDuo-Cap\u003c\/strong\u003e line. The Multi-Test Rigid is the right pick when you don’t need or want a basket in your system.\u003c\/p\u003e\u003ch3\u003eWhy \"MTR 95\" naming — ASHRAE 52.1 vs 52.2\u003c\/h3\u003e\u003cp\u003eThe Multi-Test Rigid line uses the older \u003cstrong\u003eASHRAE 52.1 dust spot efficiency percentages\u003c\/strong\u003e for tier naming — the number after \"MTR\" is the approximate dust spot efficiency. For modern HVAC documentation against ASHRAE 52.2 (MERV), the industry-standard correspondence is:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 45\u003c\/strong\u003e (45% dust spot) → approximately MERV 11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 85\u003c\/strong\u003e (85% dust spot) → approximately MERV 13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 95\u003c\/strong\u003e (95% dust spot) → approximately MERV 14\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor applications requiring formal MERV documentation, reference Koch bulletin K-1080-A or contact us for the latest spec sheet.\u003c\/p\u003e\u003ch3\u003eMTR 95 performance characteristics\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial pressure drop (12″ depth):\u003c\/strong\u003e 0.50″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial pressure drop (24″ depth):\u003c\/strong\u003e 0.55″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final pressure drop:\u003c\/strong\u003e 1.00″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency:\u003c\/strong\u003e 95% dust spot efficiency per ASHRAE 52.1; approximately MERV 14 per ASHRAE 52.2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Rigid self-supported extended-surface cartridge filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Synthetic high-efficiency media with rigid pleat structure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame compatibility:\u003c\/strong\u003e Drops directly into housings; no basket framework required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e 95% dust spot efficiency per ASHRAE 52.1; approximately MERV 14 per ASHRAE 52.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference bulletin:\u003c\/strong\u003e Koch K-1080-A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable depths:\u003c\/strong\u003e 12″ and 24″ (deeper cartridges deliver longer service life and lower pressure drop at equivalent capture)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable face sizes:\u003c\/strong\u003e 12x24 and 24x24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold by the case.\u003c\/strong\u003e Carton quantity varies by size: 12x24x12 ships 4 per case; 24x24x12 ships 2 per case; 24x24x24 ships 1 per case; 12x24x24 ships 2 per case. The variant price is the case price.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhen the Multi-Test Rigid MTR 95 is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePharmaceutical and clinical applications\u003c\/strong\u003e — manufacturing, compounding, labs needing ~MERV 14 capture in self-supported rigid form\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurgical and procedural spaces\u003c\/strong\u003e as a final filter or HEPA pre-stage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHEPA pre-stage filtration\u003c\/strong\u003e — protects expensive HEPA final filters from premature loading, extending HEPA service life dramatically\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCleanroom installations\u003c\/strong\u003e where rigid self-supported cartridges are preferred over basket-mounted alternatives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCritical-environment commercial buildings\u003c\/strong\u003e — research facilities, university labs, biotech\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat ~MERV 14 captures\u003c\/h3\u003e\u003cp\u003eCaptures most sub-micron particles, fine smoke, bacteria, and many viruses. Used in hospitals, surgical and procedural spaces, pharmaceutical environments, and as a pre-filter ahead of HEPA stages in cleanroom and laboratory installations.\u003c\/p\u003e\u003ch3\u003eChoosing across the Multi-Test Rigid line\u003c\/h3\u003e\u003cp\u003eKoch offers three efficiency tiers in the Multi-Test Rigid line, all rigid self-supported and basket-free:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 45 (~MERV 11):\u003c\/strong\u003e 45% dust spot efficiency. For mid-efficiency commercial and prefilter applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 85 (~MERV 13):\u003c\/strong\u003e 85% dust spot efficiency. For high-IAQ commercial and healthcare facilities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 95 (this product) (~MERV 14):\u003c\/strong\u003e 95% dust spot efficiency. For pharmaceutical, surgical, and HEPA pre-stage applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf your application calls for a different efficiency tier, see the matching sister product. All three Multi-Test Rigid tiers share the same rigid self-supported geometry — the difference is just which efficiency tier matches your design spec.\u003c\/p\u003e\u003ch3\u003eOther Koch cartridge filter options\u003c\/h3\u003e\u003cp\u003eIf your facility has existing basket framework, Koch also offers basket-compatible cartridges:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Test Cartridge:\u003c\/strong\u003e Collapsible cartridges designed for Farr HP basket framework. Four efficiency tiers (MT 20\/50, MT 50\/60, MT 80\/90, MT 90\/95).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuo-Cap:\u003c\/strong\u003e Cartridge filters for Cambridge Hi-Cap and Side-Cap basket framework. MERV 8 in 1-Ply and 2-Ply construction.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eMatch the cartridge family to the framework already installed in your equipment. The Multi-Test Rigid is the right pick when no basket framework is available or desired.\u003c\/p\u003e\u003ch3\u003eSizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecify both face dimensions and depth.\u003c\/strong\u003e Cartridges are sized as Width x Height x Depth (e.g., 24x24x12). Match all three dimensions to your housing — rigid cartridges cannot be cut or trimmed in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimited stock sizes.\u003c\/strong\u003e Multi-Test Rigid cartridges are typically build-to-order due to their specialty applications and rigid construction. Many sizes ship as quoted orders rather than from stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\"Call for Quote\" sizes:\u003c\/strong\u003e Most Multi-Test Rigid sizes are catalog items but require direct quoting due to lower order volume or build-to-order production. These appear unavailable in the dropdown — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e for these sizes or for facility-scale orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy shipping weight.\u003c\/strong\u003e Rigid cartridges weigh substantially more than collapsible alternatives (15-34 lbs each). Shipping rates reflect actual carrier weight.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Koch","offers":[{"title":"12x24x12","offer_id":44118930882682,"sku":"108-700-001","price":0.0,"currency_code":"USD","in_stock":false},{"title":"24x24x12","offer_id":44118930915450,"sku":"108-700-002","price":416.46,"currency_code":"USD","in_stock":true},{"title":"12x24x24","offer_id":44118930948218,"sku":"108-700-004","price":0.0,"currency_code":"USD","in_stock":false},{"title":"24x24x24","offer_id":44118930980986,"sku":"108-700-003","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/800x800.jpg?v=1777740879"},{"product_id":"koch-multi-test-rigid-mtr-85-merv-13-cartridge","title":"Koch Multi-Test Rigid MTR 85 (MERV 13) Self-Supported Cartridge Filter","description":"\u003cp\u003eThe Koch \u003cstrong\u003eMulti-Test Rigid MTR 85 Cartridge\u003c\/strong\u003e is a \u003cstrong\u003erigid self-supported extended-surface filter\u003c\/strong\u003e that drops directly into the air handler housing — \u003cstrong\u003eno basket framework required\u003c\/strong\u003e. The rigid construction holds the cartridge geometry on its own, so the filter can be installed in housings that don’t have an existing basket or in systems where the original basket has been removed. The MTR 85 tier delivers \u003cstrong\u003e85% dust spot efficiency\u003c\/strong\u003e per ASHRAE 52.1, which corresponds to approximately \u003cstrong\u003eMERV 13\u003c\/strong\u003e per the modern ASHRAE 52.2 test standard. Specified for high-IAQ commercial HVAC, healthcare, and high-occupancy environments.\u003c\/p\u003e\u003ch3\u003eRigid self-supported design (no basket required)\u003c\/h3\u003e\u003cp\u003eThis is the critical differentiator for the Multi-Test Rigid line: \u003cstrong\u003ethe cartridge supports itself\u003c\/strong\u003e. The frame and media construction hold their shape under airflow without external bracing. That means:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo basket framework needed.\u003c\/strong\u003e The cartridge installs directly into the housing — useful when the original equipment basket is missing, damaged, or wasn’t part of the original specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect compatibility\u003c\/strong\u003e with side-access housings, top-load cabinets, and front-load AHU racks that don’t use Cambridge or Farr-style baskets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplified installation\u003c\/strong\u003e — one component to install, replace, and dispose of. No basket cleaning or basket replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable geometry under airflow\u003c\/strong\u003e — the rigid construction won’t collapse or distort under high-velocity airflow or pressure spikes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor applications that \u003cem\u003edo\u003c\/em\u003e have Farr HP basket framework already installed, see the \u003cstrong\u003eMulti-Test Cartridge\u003c\/strong\u003e line (collapsible cartridges designed to fit Farr HP baskets). For Cambridge Hi-Cap and Side-Cap framework, see the \u003cstrong\u003eDuo-Cap\u003c\/strong\u003e line. The Multi-Test Rigid is the right pick when you don’t need or want a basket in your system.\u003c\/p\u003e\u003ch3\u003eWhy \"MTR 85\" naming — ASHRAE 52.1 vs 52.2\u003c\/h3\u003e\u003cp\u003eThe Multi-Test Rigid line uses the older \u003cstrong\u003eASHRAE 52.1 dust spot efficiency percentages\u003c\/strong\u003e for tier naming — the number after \"MTR\" is the approximate dust spot efficiency. For modern HVAC documentation against ASHRAE 52.2 (MERV), the industry-standard correspondence is:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 45\u003c\/strong\u003e (45% dust spot) → approximately MERV 11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 85\u003c\/strong\u003e (85% dust spot) → approximately MERV 13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 95\u003c\/strong\u003e (95% dust spot) → approximately MERV 14\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor applications requiring formal MERV documentation, reference Koch bulletin K-1080-A or contact us for the latest spec sheet.\u003c\/p\u003e\u003ch3\u003eMTR 85 performance characteristics\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial pressure drop (12″ depth):\u003c\/strong\u003e 0.25″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial pressure drop (24″ depth):\u003c\/strong\u003e 0.45″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final pressure drop:\u003c\/strong\u003e 0.80″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency:\u003c\/strong\u003e 85% dust spot efficiency per ASHRAE 52.1; approximately MERV 13 per ASHRAE 52.2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Rigid self-supported extended-surface cartridge filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Synthetic high-efficiency media with rigid pleat structure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame compatibility:\u003c\/strong\u003e Drops directly into housings; no basket framework required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e 85% dust spot efficiency per ASHRAE 52.1; approximately MERV 13 per ASHRAE 52.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference bulletin:\u003c\/strong\u003e Koch K-1080-A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable depths:\u003c\/strong\u003e 12″ and 24″ (deeper cartridges deliver longer service life and lower pressure drop at equivalent capture)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable face sizes:\u003c\/strong\u003e 12x24 and 24x24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold by the case.\u003c\/strong\u003e Carton quantity varies by size: 12x24x12 ships 4 per case; 24x24x12 ships 2 per case; 24x24x24 ships 1 per case; 12x24x24 ships 2 per case. The variant price is the case price.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhen the Multi-Test Rigid MTR 85 is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHealthcare facilities\u003c\/strong\u003e — hospitals, clinics, surgical preparation areas where ~MERV 13 capture is required and basket framework isn’t in place\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaboratory and pharmaceutical environments\u003c\/strong\u003e needing rigid cartridge construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-IAQ commercial buildings\u003c\/strong\u003e — high-occupancy facilities, schools with respiratory health priorities\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHEPA pre-stage filtration\u003c\/strong\u003e in critical-environment air handlers without basket frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial process protection\u003c\/strong\u003e where fine-particle capture and rigid construction both matter\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat ~MERV 13 captures\u003c\/h3\u003e\u003cp\u003eCaptures bacteria, smoke, viruses, and respiratory droplets. Used in healthcare, clinics, laboratories, and high-IAQ commercial buildings where fine-particle capture matters.\u003c\/p\u003e\u003ch3\u003eChoosing across the Multi-Test Rigid line\u003c\/h3\u003e\u003cp\u003eKoch offers three efficiency tiers in the Multi-Test Rigid line, all rigid self-supported and basket-free:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 45 (~MERV 11):\u003c\/strong\u003e 45% dust spot efficiency. For mid-efficiency commercial and prefilter applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 85 (this product) (~MERV 13):\u003c\/strong\u003e 85% dust spot efficiency. For high-IAQ commercial and healthcare facilities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 95 (~MERV 14):\u003c\/strong\u003e 95% dust spot efficiency. For pharmaceutical, surgical, and HEPA pre-stage applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf your application calls for a different efficiency tier, see the matching sister product. All three Multi-Test Rigid tiers share the same rigid self-supported geometry — the difference is just which efficiency tier matches your design spec.\u003c\/p\u003e\u003ch3\u003eOther Koch cartridge filter options\u003c\/h3\u003e\u003cp\u003eIf your facility has existing basket framework, Koch also offers basket-compatible cartridges:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Test Cartridge:\u003c\/strong\u003e Collapsible cartridges designed for Farr HP basket framework. Four efficiency tiers (MT 20\/50, MT 50\/60, MT 80\/90, MT 90\/95).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuo-Cap:\u003c\/strong\u003e Cartridge filters for Cambridge Hi-Cap and Side-Cap basket framework. MERV 8 in 1-Ply and 2-Ply construction.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eMatch the cartridge family to the framework already installed in your equipment. The Multi-Test Rigid is the right pick when no basket framework is available or desired.\u003c\/p\u003e\u003ch3\u003eSizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecify both face dimensions and depth.\u003c\/strong\u003e Cartridges are sized as Width x Height x Depth (e.g., 24x24x12). Match all three dimensions to your housing — rigid cartridges cannot be cut or trimmed in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimited stock sizes.\u003c\/strong\u003e Multi-Test Rigid cartridges are typically build-to-order due to their specialty applications and rigid construction. Many sizes ship as quoted orders rather than from stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\"Call for Quote\" sizes:\u003c\/strong\u003e Most Multi-Test Rigid sizes are catalog items but require direct quoting due to lower order volume or build-to-order production. These appear unavailable in the dropdown — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e for these sizes or for facility-scale orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy shipping weight.\u003c\/strong\u003e Rigid cartridges weigh substantially more than collapsible alternatives (15-34 lbs each). Shipping rates reflect actual carrier weight.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Koch","offers":[{"title":"12x24x12","offer_id":44118931013754,"sku":"108-701-001","price":712.68,"currency_code":"USD","in_stock":true},{"title":"24x24x12","offer_id":44118931046522,"sku":"108-701-002","price":413.86,"currency_code":"USD","in_stock":true},{"title":"12x24x24","offer_id":44118931079290,"sku":"108-701-004","price":0.0,"currency_code":"USD","in_stock":false},{"title":"24x24x24","offer_id":44118931112058,"sku":"108-701-003","price":287.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/800x800_2d995080-4c3a-435e-8984-c054dce0c3d7.jpg?v=1777740884"},{"product_id":"koch-multi-test-rigid-mtr-45-merv-11-cartridge","title":"Koch Multi-Test Rigid MTR 45 (MERV 11) Self-Supported Cartridge Filter","description":"\u003cp\u003eThe Koch \u003cstrong\u003eMulti-Test Rigid MTR 45 Cartridge\u003c\/strong\u003e is a \u003cstrong\u003erigid self-supported extended-surface filter\u003c\/strong\u003e that drops directly into the air handler housing — \u003cstrong\u003eno basket framework required\u003c\/strong\u003e. The rigid construction holds the cartridge geometry on its own, so the filter can be installed in housings that don’t have an existing basket or in systems where the original basket has been removed. The MTR 45 tier delivers \u003cstrong\u003e45% dust spot efficiency\u003c\/strong\u003e per ASHRAE 52.1, which corresponds to approximately \u003cstrong\u003eMERV 11\u003c\/strong\u003e per the modern ASHRAE 52.2 test standard. Specified for mid-efficiency commercial HVAC and prefilter applications ahead of higher-MERV final stages.\u003c\/p\u003e\u003ch3\u003eRigid self-supported design (no basket required)\u003c\/h3\u003e\u003cp\u003eThis is the critical differentiator for the Multi-Test Rigid line: \u003cstrong\u003ethe cartridge supports itself\u003c\/strong\u003e. The frame and media construction hold their shape under airflow without external bracing. That means:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo basket framework needed.\u003c\/strong\u003e The cartridge installs directly into the housing — useful when the original equipment basket is missing, damaged, or wasn’t part of the original specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect compatibility\u003c\/strong\u003e with side-access housings, top-load cabinets, and front-load AHU racks that don’t use Cambridge or Farr-style baskets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplified installation\u003c\/strong\u003e — one component to install, replace, and dispose of. No basket cleaning or basket replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable geometry under airflow\u003c\/strong\u003e — the rigid construction won’t collapse or distort under high-velocity airflow or pressure spikes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor applications that \u003cem\u003edo\u003c\/em\u003e have Farr HP basket framework already installed, see the \u003cstrong\u003eMulti-Test Cartridge\u003c\/strong\u003e line (collapsible cartridges designed to fit Farr HP baskets). For Cambridge Hi-Cap and Side-Cap framework, see the \u003cstrong\u003eDuo-Cap\u003c\/strong\u003e line. The Multi-Test Rigid is the right pick when you don’t need or want a basket in your system.\u003c\/p\u003e\u003ch3\u003eWhy \"MTR 45\" naming — ASHRAE 52.1 vs 52.2\u003c\/h3\u003e\u003cp\u003eThe Multi-Test Rigid line uses the older \u003cstrong\u003eASHRAE 52.1 dust spot efficiency percentages\u003c\/strong\u003e for tier naming — the number after \"MTR\" is the approximate dust spot efficiency. For modern HVAC documentation against ASHRAE 52.2 (MERV), the industry-standard correspondence is:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 45\u003c\/strong\u003e (45% dust spot) → approximately MERV 11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 85\u003c\/strong\u003e (85% dust spot) → approximately MERV 13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 95\u003c\/strong\u003e (95% dust spot) → approximately MERV 14\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor applications requiring formal MERV documentation, reference Koch bulletin K-1080-A or contact us for the latest spec sheet.\u003c\/p\u003e\u003ch3\u003eMTR 45 performance characteristics\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial pressure drop (12″ depth):\u003c\/strong\u003e 0.16″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial pressure drop (24″ depth):\u003c\/strong\u003e 0.40″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended final pressure drop:\u003c\/strong\u003e 0.70″ w.g.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency:\u003c\/strong\u003e 45% dust spot efficiency per ASHRAE 52.1; approximately MERV 11 per ASHRAE 52.2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Rigid self-supported extended-surface cartridge filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Synthetic high-efficiency media with rigid pleat structure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame compatibility:\u003c\/strong\u003e Drops directly into housings; no basket framework required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e 45% dust spot efficiency per ASHRAE 52.1; approximately MERV 11 per ASHRAE 52.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference bulletin:\u003c\/strong\u003e Koch K-1080-A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable depths:\u003c\/strong\u003e 12″ and 24″ (deeper cartridges deliver longer service life and lower pressure drop at equivalent capture)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable face sizes:\u003c\/strong\u003e 12x24 and 24x24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold by the case.\u003c\/strong\u003e Carton quantity varies by size: 12x24x12 ships 4 per case; 24x24x12 ships 2 per case; 24x24x24 ships 1 per case; 12x24x24 ships 2 per case. The variant price is the case price.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhen the Multi-Test Rigid MTR 45 is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMid-efficiency commercial HVAC final filtration\u003c\/strong\u003e — office buildings, schools, hotels where ~MERV 11 capture is the design target and basket framework isn’t available\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrefilter stages\u003c\/strong\u003e ahead of MERV 13+ final stages in multi-stage systems — the rigid form factor protects downstream filters and extends their service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight-industrial systems\u003c\/strong\u003e in housings without basket framework\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-air-volume systems\u003c\/strong\u003e where the rigid geometry handles airflow swings without flexing\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. Strong general-purpose efficiency for offices, schools, hotels, and light industrial.\u003c\/p\u003e\u003ch3\u003eChoosing across the Multi-Test Rigid line\u003c\/h3\u003e\u003cp\u003eKoch offers three efficiency tiers in the Multi-Test Rigid line, all rigid self-supported and basket-free:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 45 (this product) (~MERV 11):\u003c\/strong\u003e 45% dust spot efficiency. For mid-efficiency commercial and prefilter applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 85 (~MERV 13):\u003c\/strong\u003e 85% dust spot efficiency. For high-IAQ commercial and healthcare facilities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTR 95 (~MERV 14):\u003c\/strong\u003e 95% dust spot efficiency. For pharmaceutical, surgical, and HEPA pre-stage applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf your application calls for a different efficiency tier, see the matching sister product. All three Multi-Test Rigid tiers share the same rigid self-supported geometry — the difference is just which efficiency tier matches your design spec.\u003c\/p\u003e\u003ch3\u003eOther Koch cartridge filter options\u003c\/h3\u003e\u003cp\u003eIf your facility has existing basket framework, Koch also offers basket-compatible cartridges:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Test Cartridge:\u003c\/strong\u003e Collapsible cartridges designed for Farr HP basket framework. Four efficiency tiers (MT 20\/50, MT 50\/60, MT 80\/90, MT 90\/95).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuo-Cap:\u003c\/strong\u003e Cartridge filters for Cambridge Hi-Cap and Side-Cap basket framework. MERV 8 in 1-Ply and 2-Ply construction.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eMatch the cartridge family to the framework already installed in your equipment. The Multi-Test Rigid is the right pick when no basket framework is available or desired.\u003c\/p\u003e\u003ch3\u003eSizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecify both face dimensions and depth.\u003c\/strong\u003e Cartridges are sized as Width x Height x Depth (e.g., 24x24x12). Match all three dimensions to your housing — rigid cartridges cannot be cut or trimmed in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimited stock sizes.\u003c\/strong\u003e Multi-Test Rigid cartridges are typically build-to-order due to their specialty applications and rigid construction. Many sizes ship as quoted orders rather than from stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\"Call for Quote\" sizes:\u003c\/strong\u003e Most Multi-Test Rigid sizes are catalog items but require direct quoting due to lower order volume or build-to-order production. These appear unavailable in the dropdown — \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e for these sizes or for facility-scale orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy shipping weight.\u003c\/strong\u003e Rigid cartridges weigh substantially more than collapsible alternatives (15-34 lbs each). Shipping rates reflect actual carrier weight.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Koch","offers":[{"title":"12x24x12","offer_id":44118931144826,"sku":"108-703-001","price":0.0,"currency_code":"USD","in_stock":false},{"title":"24x24x12","offer_id":44118931177594,"sku":"108-703-002","price":0.0,"currency_code":"USD","in_stock":false},{"title":"12x24x24","offer_id":44118931210362,"sku":"108-703-004","price":0.0,"currency_code":"USD","in_stock":false},{"title":"24x24x24","offer_id":44118931243130,"sku":"108-703-003","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/800x800_063cc2f8-a10d-4f53-9818-7b31658762ae.jpg?v=1777740893"}],"url":"https:\/\/www.rememberthefilter.com\/collections\/koch-multi-test-cartridge.oembed","provider":"RememberTheFilter.com","version":"1.0","type":"link"}