{"product_id":"filter-king-12-5x21x1-air-filter-6-pack-merv-11-pleated-filters","title":"Filter King 12.5x21x1 Air Filter 6-Pack - MERV 11 Pleated Filters","description":"\u003cp\u003eIn this review of the Filter King 12.5x21x1 Air Filter 6-pack, the bottom line is simple: this set is for homeowners who want a higher-capture replacement filter that fits common 1 in housings and is fully made in the United States. The reviewer found the pleated \u003cstrong\u003eMERV 11\u003c\/strong\u003e media noticeably reduces airborne particles within a couple of days, and the six-pack gives a practical supply for multiple changes. If you need reliable filtration without changing your HVAC configuration, this pack is aimed squarely at routine home maintenance.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 11 rating:\u003c\/strong\u003e Captures fine airborne particles such as dust, pollen and some mold spores to improve indoor air quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleated construction:\u003c\/strong\u003e The pleated design increases surface area so the filter traps more contaminants and extends service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6-pack supply:\u003c\/strong\u003e Provides multiple replacements so homeowners can keep a regular change schedule without frequent reordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Fully manufactured domestically, which may reassure users about consistent materials and quality control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong life guidance:\u003c\/strong\u003e Rated to last up to 90 days in many applications, giving flexibility to change between 30 and 90 days depending on conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy installation:\u003c\/strong\u003e Simple open, slide and close design makes replacement quick for most furnace and A\/C housings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis pack is best for homeowners and renters with 1 in filter slots who want higher-efficiency filtration than standard fiberglass pads. It suits people who prefer a multi-pack to reduce shopping frequency and those who value a domestically produced product.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for households that require hospital-grade filtration or for systems that need thicker filters than 1 in. Also, buyers who prioritize an ultra-rigid frame over a lightweight pleated frame may want to inspect a single filter first to confirm build preference.\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\u003eHigher particle capture with \u003cstrong\u003eMERV 11\u003c\/strong\u003e media improves air cleanliness compared with low-efficiency pads.\u003c\/li\u003e\n\u003cli\u003ePleated design extends filter life and reduces frequency of replacements when used within recommended intervals.\u003c\/li\u003e\n\u003cli\u003eSix filters in one pack is convenient and cost-effective for scheduled maintenance.\u003c\/li\u003e\n\u003cli\u003eManufactured in the United States, offering consistent sourcing and production oversight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers report mixed perceptions of build quality, with a few finding the frame less rigid than expected.\u003c\/li\u003e\n\u003cli\u003eThe actual thickness is 0.75 in rather than a full 1 in, so buyers should double-check slot clearance before purchase.\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\u003eModel size (labeled)\u003c\/td\u003e\n\u003ctd\u003e12.5 x 21 x 1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual size\u003c\/td\u003e\n\u003ctd\u003e12.5 x 21 x 0.75 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMERV rating\u003c\/td\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e6 filters\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Filter King 12.5x21x1 6-pack is a practical, value-oriented choice for homeowners who want improved indoor air capture without changing their HVAC setup. With \u003cstrong\u003eMERV 11\u003c\/strong\u003e filtration, a pleated design and a six-pack supply, it balances performance, convenience and domestic manufacture, though buyers should confirm the 0.75 in actual thickness fits their filter slot.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this the full 1 in thickness?\u003c\/strong\u003e\u003cbr\u003eAnswer. The labeled size is 12.5 x 21 x 1 in but the actual thickness is 0.75 in, so measure your slot before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should these be changed?\u003c\/strong\u003e\u003cbr\u003eAnswer. The filters are rated for up to 90 days depending on use, with a general recommendation to change between 30 and 90 days for 1 in filters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill these restrict airflow?\u003c\/strong\u003e\u003cbr\u003eAnswer. MERV 11 pleated filters are designed to capture more particles without significantly impacting airflow in most residential systems, but check your system specifications if concerned.\u003c\/p\u003e","brand":"Filter King","offers":[{"title":"Default Title","offer_id":48649151414491,"sku":"B0CZMJDTFB","price":79.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71Diu_hGBQL._AC_SL1342_07106755-2aa9-442d-abb3-4ba1c77b0a54.jpg?v=1778723881","url":"https:\/\/gearmusthave.com\/products\/filter-king-12-5x21x1-air-filter-6-pack-merv-11-pleated-filters","provider":"GearMustHave","version":"1.0","type":"link"}