{"product_id":"24x24x4-koch-micromax-pl4s-merv-15-120-614-2424","title":"24x24x4 Koch MicroMAX PL4S Box Style MERV 15 120-614-2424 (3 Filters)","description":"\u003cp\u003eThis \u003cstrong\u003e24″ × 24″ × 4″\u003c\/strong\u003e \u003cstrong\u003eKoch MicroMAX PL4S\u003c\/strong\u003e filter (part number 120-614-2424) 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":44118787620986,"sku":"120-614-2424","price":528.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_426a2bfd-83cb-4b0c-add3-0420f6c82431.jpg?v=1777661043","url":"https:\/\/www.rememberthefilter.com\/products\/24x24x4-koch-micromax-pl4s-merv-15-120-614-2424","provider":"RememberTheFilter.com","version":"1.0","type":"link"}