{"product_id":"filter-king-39-5x36-5x1-air-filter-4-pack-merv-8-pleated-filters","title":"Filter King 39.5x36.5x1 Air Filter 4-Pack - MERV 8 Pleated Filters","description":"\u003cp\u003eIn this review the Filter King 39.5x36.5x1 Air Filter 4-Pack is evaluated for homeowners and maintenance pros who need a reliable, easy-to-install 1 in replacement. The bottom line: this set delivers consistent filtration with a \u003cstrong\u003eMERV 8\u003c\/strong\u003e rating and a pleated design that captures more airborne particles without noticeably restricting airflow. For anyone replacing furnace or A\/C filters in large grills or return housings, the real-world advantage is a better fit and visible dust reduction inside two days.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 8 rating:\u003c\/strong\u003e Provides moderate filtration that captures common airborne particles while maintaining good airflow for HVAC systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Fully manufactured in the United States using consistent materials and construction practices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleated design:\u003c\/strong\u003e Extends filter life and traps more particles compared with flat media, reducing dust buildup on HVAC components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActual size accuracy:\u003c\/strong\u003e Labeled as 39.5 in x 36.5 in x 1 in with an actual thickness of 0.75 in, which helps ensure a correct fit for undersized housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 90 day use:\u003c\/strong\u003e Rated to last up to 90 days depending on conditions, giving flexible replacement intervals of 30 to 90 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy installation:\u003c\/strong\u003e Simple open, slide and close design makes swapping filters quick during routine maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis 4-pack is best for homeowners, property managers, and HVAC technicians who need a reliable, mid-level filtration option for furnaces and residential air conditioners. It suits systems where \u003cstrong\u003eMERV 8\u003c\/strong\u003e balance of particle capture and airflow is preferred, and for households that want filters fully manufactured in the United States.\u003c\/p\u003e\n\u003cp\u003eThose needing hospital-grade filtration, allergy-specific media, or thicker multi-inch cartridges should look elsewhere; this product is a 1 in pleated filter optimized for standard residential returns rather than specialized environments.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConsistent \u003cstrong\u003eMERV 8\u003c\/strong\u003e performance that traps common household particles without major airflow restriction.\u003c\/li\u003e\n\u003cli\u003eMade in USA construction with predictable quality and materials.\u003c\/li\u003e\n\u003cli\u003eGood fit and finish noted by customers, which reduces the chance of gaps or poor sealing.\u003c\/li\u003e\n\u003cli\u003eFour filters per pack provide ready replacements for several months of routine use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eActual thickness is 0.75 in so tight 1 in slots may need careful fitting to avoid wobble.\u003c\/li\u003e\n\u003cli\u003eNot designed for high-efficiency medical or HEPA-level filtration needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFilter King\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e4-pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Size\u003c\/td\u003e\n\u003ctd\u003e39.5 in x 36.5 in x 1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual Size\u003c\/td\u003e\n\u003ctd\u003e39.5 in x 36.5 in x 0.75 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMERV Rating\u003c\/td\u003e\n\u003ctd\u003eMERV 8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMade In\u003c\/td\u003e\n\u003ctd\u003eUSA (EPA Est. 103501-FL-1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Change Interval\u003c\/td\u003e\n\u003ctd\u003e30 - 90 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Filter King 39.5x36.5x1 4-pack is a practical, cost-effective choice for residential HVAC maintenance when you need reliable \u003cstrong\u003eMERV 8\u003c\/strong\u003e filtration and consistent fit. It offers American-made construction, easy installation and a pleated design that noticeably reduces dust in ordinary homes, making it a strong value for routine replacement cycles.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow long do these filters last?\u003c\/strong\u003e\u003cbr\u003eThey are rated to last up to 90 days, with recommended replacement intervals of 30 to 90 days depending on usage and environment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these filters made in the United States?\u003c\/strong\u003e\u003cbr\u003eYes, they are fully manufactured in the USA with EPA establishment number 103501-FL-1 noted by the manufacturer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the thickness cause fit issues?\u003c\/strong\u003e\u003cbr\u003eThe actual thickness is 0.75 in so some tight 1 in housings may need careful insertion, but customers report a good overall fit in standard return slots.\u003c\/p\u003e","brand":"Filter King","offers":[{"title":"Default Title","offer_id":48619874975963,"sku":"B0CPT9X7NC","price":142.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71ScDMxrR8L._AC_SL1500.jpg?v=1778439967","url":"https:\/\/gearmusthave.com\/products\/filter-king-39-5x36-5x1-air-filter-4-pack-merv-8-pleated-filters","provider":"GearMustHave","version":"1.0","type":"link"}