{"product_id":"filter-king-13x21-5x1-air-filter-6-pack-merv-11-performance","title":"Filter King 13x21.5x1 Air Filter 6-Pack - MERV 11 Performance","description":"\u003cp\u003eIn this review of the Filter King 13x21.5x1 Air Filter 6-Pack, the bottom line is simple: this set is aimed at homeowners and renters who want a reliable medium-efficiency replacement that balances particle capture and airflow. The reviewer found the MERV 11 pleated design captures noticeably more dust and allergens than basic fiberglass filters, and because these filters are fully manufactured in the USA the construction and materials inspire confidence for routine HVAC maintenance.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 11 rating:\u003c\/strong\u003e Provides stronger capture of pollen, dust, and pet dander than low-efficiency filters while maintaining good airflow for typical home HVAC systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix pack convenience:\u003c\/strong\u003e Supplies enough replacements to cover several months of regular use, making scheduled changes simpler to keep equipment running efficiently.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleated design:\u003c\/strong\u003e Extends the filter lifetime and increases surface area to trap more particles without a large impact on air movement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Fully manufactured domestically, which suggests consistent quality control and traceability (EPA establishment 103501-FL-1).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 90 day life:\u003c\/strong\u003e Can last as long as 90 days depending on household conditions, supporting lower maintenance frequency when indoor pollution is light.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis product is best for homeowners, renters, or landlords who use a 13 in x 21.5 in x 1 in slot filter and want a mid-range option that captures more airborne particles than basic disposable filters. It suits households with mild allergies, pets, or moderate dust where improved indoor air quality is desired without upgrading to a high-restriction filter.\u003c\/p\u003e\u003cp\u003ePeople who need a thicker filter, very high-efficiency filtration for severe allergy or medical needs, or who require exacting industrial-grade performance should look elsewhere; this 1 in pleated MERV 11 filter is intended for standard residential HVAC systems where airflow must be preserved.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGood particle capture for homes thanks to the \u003cstrong\u003eMERV 11\u003c\/strong\u003e pleated media.\u003c\/li\u003e\n\u003cli\u003eSix-pack format makes routine replacement straightforward and cost effective.\u003c\/li\u003e\n\u003cli\u003eMade in the USA with traceable production details for consistent supply.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome customers reported mixed impressions of build quality, with a few finding the material less rigid than expected.\u003c\/li\u003e\n\u003cli\u003eA small number of users noted ambiguity about the exact nominal versus actual thickness, so double-check fit in older frames.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\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\u003eRating\u003c\/td\u003e\n\u003ctd\u003eMERV 11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack size\u003c\/td\u003e\n\u003ctd\u003e6 pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal size\u003c\/td\u003e\n\u003ctd\u003e13 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\u003e13 in x 21.5 in x 0.75 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended change interval\u003c\/td\u003e\n\u003ctd\u003e30-90 days (depending on conditions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufactured\u003c\/td\u003e\n\u003ctd\u003eMade in USA (EPA 103501-FL-1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Filter King 13x21.5x1 6-pack is a practical choice for most residential HVAC systems that need better filtration than basic disposable filters. It delivers improved particle capture with a pleated MERV 11 media, comes in a convenient six-pack, and is made in the USA, so it represents solid value for routine home maintenance while preserving airflow.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHow often should these filters be replaced?\u003c\/strong\u003e\u003cbr\u003eReplace every 30-90 days depending on household conditions; the filters can last up to 90 days in low-dust situations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill a MERV 11 filter reduce airflow?\u003c\/strong\u003e\u003cbr\u003eMERV 11 provides higher capture with minimal impact on airflow for most residential systems, but always confirm your HVAC can handle a pleated 1 in filter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre these filters made in the United States?\u003c\/strong\u003e\u003cbr\u003eYes, they are fully manufactured in the USA and list EPA establishment number 103501-FL-1.\u003c\/p\u003e","brand":"Filter King","offers":[{"title":"Default Title","offer_id":48200440545499,"sku":"B07J9Q9JFY","price":81.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71Diu_hGBQL._AC_SL1342_3bdeb754-276d-426f-9615-32f24d555a1b.jpg?v=1769793409","url":"https:\/\/gearmusthave.com\/products\/filter-king-13x21-5x1-air-filter-6-pack-merv-11-performance","provider":"GearMustHave","version":"1.0","type":"link"}