{"product_id":"filter-king-13x21x1-air-filter-6-pack-merv-11-performance","title":"Filter King 13x21x1 Air Filter 6-Pack - MERV 11 Performance","description":"\u003cp\u003eIn this review of the Filter King 13x21x1 Air Filter 6-pack, the bottom line is simple: this set is for homeowners who want a reliable, American-made replacement filter that balances particle capture with sustained airflow. The reviewer found the six-pack convenient for regular maintenance cycles and was impressed by the pleated design that begins to improve indoor air quality quickly. This product is most useful for those who replace 1 in filters every 30 to 90 days and want a MERV 11 level of filtration without a premium price tag.\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 finer airborne particles than lower-rated filters, helping reduce allergens and contaminants in the home.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e6-pack supply:\u003c\/strong\u003e Provides multiple replacements so users can follow a 30 to 90 day change schedule without frequent reordering.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003ePleated design:\u003c\/strong\u003e Increases surface area to trap more particles and extend the functional life of each filter.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Fully manufactured in the United States under EPA registration for consistent build and material standards.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eActual size listing:\u003c\/strong\u003e Lists nominal 13 in x 21 in x 1 in with the actual thickness noted at 0.75 in, helping buyers confirm fit before purchase.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eEasy installation:\u003c\/strong\u003e Simple open, slide and close installation makes replacement quick and tool-free.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis product is aimed at homeowners and renters who use standard 1 in HVAC filters and want a balance of dust and allergen capture without significantly restricting airflow. The MERV 11 rating makes it suitable for households with pets, light allergy sufferers, or anyone wanting cleaner return-air into A\/C and furnace systems.\u003c\/p\u003e\n\u003cp\u003eThose who need thicker filters for higher dust loads, specialized HEPA-level filtration, or strict medical-grade requirements should look elsewhere. Also, buyers expecting an exact 1 in thickness may want to double-check their unit clearance since the actual depth is 0.75 in.\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 particle capture for a 1 in style filter thanks to the pleated construction.\u003c\/li\u003e\n \u003cli\u003eSix filters in a pack reduce the need for frequent orders and simplify scheduled changes.\u003c\/li\u003e\n \u003cli\u003eManufactured in the United States, which appeals to buyers who prefer domestic production.\u003c\/li\u003e\n \u003cli\u003eEasy, tool-free installation that most users can do in minutes.\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 build quality impressions; a few find the construction less sturdy than expected.\u003c\/li\u003e\n \u003cli\u003eActual thickness is 0.75 in rather than a full 1 in, which may cause fit confusion in tight slots.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003ePleated HVAC air filter\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eSize (nominal)\u003c\/td\u003e\n\u003ctd\u003e13 in x 21 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 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 11\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e6 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 Establishment 103501-FL-1)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eRecommended change interval\u003c\/td\u003e\n\u003ctd\u003eEvery 30 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 13x21x1 6-pack is a practical choice for routine home HVAC maintenance: it offers effective MERV 11 filtration, a convenient multi-pack, and American manufacturing. It represents good value for most households that need improved particulate removal without moving to thicker or specialty filters, though buyers should confirm fit because the actual thickness is 0.75 in.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should these filters be changed?\u003c\/strong\u003e\u003cbr\u003eManufacturer guidance and typical practice suggest replacing 1 in filters every 30 to 90 days, depending on usage and household conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill a MERV 11 filter affect airflow?\u003c\/strong\u003e\u003cbr\u003eMERV 11 is designed to capture finer particles while maintaining acceptable airflow for most residential A\/C and furnace systems; users should monitor system performance after installing any higher-rated filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the listed size accurate for slot fit?\u003c\/strong\u003e\u003cbr\u003eThe product is listed as 13 in x 21 in x 1 in but the actual thickness is 0.75 in, so check your filter slot clearance before installing.\u003c\/p\u003e","brand":"Filter King","offers":[{"title":"Default Title","offer_id":48230839419099,"sku":"B07JB3FS2H","price":85.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71Diu_hGBQL._AC_SL1342_5199ec25-1835-4890-8b71-9315cc7c1e92.jpg?v=1770901842","url":"https:\/\/gearmusthave.com\/products\/filter-king-13x21x1-air-filter-6-pack-merv-11-performance","provider":"GearMustHave","version":"1.0","type":"link"}