{"product_id":"4-5x36-5x1-air-filter-4-pack-merv-8-made-in-usa-king","title":"4.5x36.5x1 Air Filter 4-Pack MERV 8 - Made in USA King","description":"\u003cp\u003eIn this review of the 4.5 x 36.5 x 1 air filter 4-pack, the reviewer finds a practical, no-frills replacement filter for homeowners and renters who want reliable dust control without complex installation. The biggest reason to buy is straightforward: these MERV 8 pleated filters capture more airborne particles than basic flat filters while maintaining airflow, and they are fully manufactured in the United States, which matters to buyers seeking domestic production and consistent construction.\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 effective capture of common household particles such as dust and pollen without significantly restricting airflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleated design:\u003c\/strong\u003e The pleats increase surface area so the filter traps more particles and lasts longer between changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Fully manufactured domestically with consistent materials and construction under EPA establishment number 103501-FL-1.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-pack convenience:\u003c\/strong\u003e Supplying four filters at once makes it easier to follow the recommended 30 to 90 day replacement cycle for 1 in filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast installation:\u003c\/strong\u003e The open, slide and close fit is simple and generally quick for most furnace and A\/C filter slots.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eHomeowners and renters with standard 1 in filter slots who want an upgrade from fiberglass flat filters will appreciate the improved dust control and longer service life; the MERV 8 rating suits households concerned about general indoor air quality but not requiring HEPA-level filtration. Those who prefer products made in the United States will also value the domestic manufacturing claim.\u003c\/p\u003e\n\u003cp\u003eIt is not aimed at people who need medical-grade filtration or have specific allergy or immunocompromised needs where higher MERV or HEPA filters are recommended. Also, customers with nonstandard filter dimensions should verify the actual size of 4.5 x 36.5 x 0.75 in before buying.\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\u003eGood balance of particle capture and airflow thanks to the \u003cstrong\u003eMERV 8\u003c\/strong\u003e pleated construction.\u003c\/li\u003e\n\u003cli\u003eManufactured in the USA, which supports consistent build quality and supply traceability.\u003c\/li\u003e\n\u003cli\u003eFour filters per pack offer convenience and value for routine replacements.\u003c\/li\u003e\n\u003cli\u003eMany customers report improved dust control and noticeable air quality within days.\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 rather than a full 1 in, so users should confirm fit for some tight slots.\u003c\/li\u003e\n\u003cli\u003eWhile most find installation easy, a minority report some difficulty fitting the filter into certain frames.\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 MERV\u003c\/td\u003e\n\u003ctd\u003eMERV 8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal size\u003c\/td\u003e\n\u003ctd\u003e4.5 x 36.5 x 1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual size\u003c\/td\u003e\n\u003ctd\u003e4.5 x 36.5 x 0.75 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMade in\u003c\/td\u003e\n\u003ctd\u003eUnited States (EPA Establishment 103501-FL-1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended change interval\u003c\/td\u003e\n\u003ctd\u003e30 to 90 days for 1 in filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Filter King 4.5 x 36.5 x 1 MERV 8 4-pack is a sensible, value-oriented choice for most homes needing improved dust control without sacrificing airflow. With pleated media, domestic manufacture, and a convenient 4-pack, it is good value for routine replacements, provided buyers confirm the actual 0.75 in thickness fits their filter compartment.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the actual thickness of the filter?\u003c\/strong\u003e\u003cbr\u003eThe actual thickness is 0.75 in, although the nominal size is listed as 1 in, so measure your slot before purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should these filters be changed?\u003c\/strong\u003e\u003cbr\u003eThe manufacturer recommends changing 1 in filters every 30 to 90 days depending on use, with many users finding good performance up to 90 days.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill these filters affect airflow?\u003c\/strong\u003e\u003cbr\u003eWith a MERV 8 rating and pleated design, they capture more particles while maintaining typical airflow for most residential HVAC systems.\u003c\/p\u003e","brand":"Filter King","offers":[{"title":"Default Title","offer_id":48665064440027,"sku":"B0CJVP2RRP","price":62.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71EMBy5ojjL._AC_SL1500.jpg?v=1778698693","url":"https:\/\/gearmusthave.com\/products\/4-5x36-5x1-air-filter-4-pack-merv-8-made-in-usa-king","provider":"GearMustHave","version":"1.0","type":"link"}