{"product_id":"filter-king-17-5x21-5x1-air-filter-4-pack-merv-8-pleated-filters","title":"Filter King 17.5x21.5x1 Air Filter 4-Pack - MERV 8 Pleated Filters","description":"\u003cp\u003eIn this review the Filter King 17.5x21.5x1 Air Filter 4-Pack is judged on fit, filtration and value. It is best for homeowners and renters who need a mid-range \u003cstrong\u003eMERV 8\u003c\/strong\u003e replacement that balances particle capture with airflow; the single biggest reason to consider it is the pleated design that traps more dust and airborne debris without noticeably restricting system performance. The pack of four and the claim of up to 90 days of use make it a practical choice for routine HVAC maintenance.\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 airborne particles while maintaining good airflow for most residential systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActual size:\u003c\/strong\u003e Measures 17.5 in x 21.5 in x 0.75 in so it fits housings sized for nominal 1 in filters when true dimensions are needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleated construction:\u003c\/strong\u003e The pleats increase surface area to collect more dust and extend usable life between changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Fully manufactured in the United States with EPA establishment identification for traceability and quality control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-pack value:\u003c\/strong\u003e Four filters in one purchase simplifies scheduled changes and reduces the per-filter cost compared with buying singly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy installation:\u003c\/strong\u003e The simple open, slide and close design makes filter replacement quick and straightforward for most users.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis set is aimed at homeowners, renters and small business owners who want reliable, mid-level filtration for A\/C and furnace systems and who change 1 in filters on a regular schedule. It suits anyone looking for a straightforward upgrade from very basic fiberglass filters without the added restriction of higher-MERV pleats that can tax older fan motors.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for those needing high-efficiency allergy or medical-grade filtration, and households that require HEPA-like capture should look for higher MERV ratings or supplemental filtration devices. Also measure your filter slot carefully: a few reviewers noted width variation, so exact fit matters.\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 media.\u003c\/li\u003e\n\u003cli\u003eFour-pack provides convenience and lower cost per replacement.\u003c\/li\u003e\n\u003cli\u003eMade in the USA with consistent build quality and clear manufacturing identification.\u003c\/li\u003e\n\u003cli\u003eEasy to install with a simple slide-in design that most homeowners manage quickly.\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 which may cause a tight fit in some frames expecting exactly 1 in filters.\u003c\/li\u003e\n\u003cli\u003eA few customers reported mixed impressions on long-term durability compared with heavier-duty models.\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\u003eNominal size\u003c\/td\u003e\n\u003ctd\u003e17.5 in x 21.5 in x 1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual size\u003c\/td\u003e\n\u003ctd\u003e17.5 in x 21.5 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\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e4-pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of manufacture\u003c\/td\u003e\n\u003ctd\u003eMade in USA (EPA 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 17.5x21.5x1 4-Pack is a sensible, good-value choice for routine residential HVAC maintenance: it captures dust effectively, is easy to install and is fully made in the USA. For most households seeking improved indoor air quality without putting strain on older systems, this pack is practical and cost-effective, though those needing tighter tolerances or higher efficiency should consider other options.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should these filters be replaced?\u003c\/strong\u003e\u003cbr\u003eFilter King recommends replacing 1 in filters every 30 - 90 days depending on use and household conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill a MERV 8 filter restrict airflow?\u003c\/strong\u003e\u003cbr\u003eMERV 8 balances filtration and airflow; it captures common particles without significantly impacting most residential A\/C or furnace performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these filters really made in the USA?\u003c\/strong\u003e\u003cbr\u003eYes, the product is fully manufactured in the United States and lists an EPA establishment number for reference.\u003c\/p\u003e","brand":"Filter King","offers":[{"title":"Default Title","offer_id":48249381945563,"sku":"B0CPT7VFX2","price":43.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71LVXs6AO9L._AC_SL1500.jpg?v=1770919585","url":"https:\/\/gearmusthave.com\/products\/filter-king-17-5x21-5x1-air-filter-4-pack-merv-8-pleated-filters","provider":"GearMustHave","version":"1.0","type":"link"}