{"product_id":"13x21-5x1-merv-11-air-filter-12-pack-pet-allergy-defense","title":"13x21.5x1 MERV 11 Air Filter 12-Pack - Pet \u0026 Allergy Defense","description":"\u003cp\u003eOur review of the 13x21.5x1 MERV 11 air filter 12-pack finds it best suited for households that need reliable, longlasting filtration without frequent swaps. The biggest reason to buy is the combination of \u003cstrong\u003eMERV 11 performance\u003c\/strong\u003e and durable construction: electrostatically charged media with dense pleating captures a wide range of allergens and dust while lasting well beyond basic fiberglass options. For homes with pets or occupants sensitive to dust, this pack offers a clear maintenance advantage when replaced every 90 days.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal compatibility:\u003c\/strong\u003e Sized to fit standard 13x21.5x1 slots (actual 12.88 x 21.50 x 0.75 in) so it replaces many furnace, heat pump, and AC filters without hassle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 11 filtration:\u003c\/strong\u003e Synthetic media captures finer particles, including pet dander and common allergens, while maintaining good airflow for HVAC efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrostatic pleated media:\u003c\/strong\u003e 14 pleats per ft increase surface area and particle capture, which helps the filter last longer than fiberglass alternatives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust frame:\u003c\/strong\u003e Beverage board frame with dual wire backing improves durability and resists warping in varied temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA:\u003c\/strong\u003e Constructed with industrial-grade recyclable materials and manufactured domestically for consistent quality control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis 12-pack is ideal for homeowners with pets, allergy sufferers, or anyone who wants fewer filter changes across the year; replacing every 90 days still keeps effective performance, so the bulk pack reduces maintenance trips. It also suits small businesses and rental properties that need a reliable, mid-level filtration without high cost.\u003c\/p\u003e\n\u003cp\u003eShoppers who require exact, nonstandard dimensions should confirm the actual 12.88 x 21.50 x 0.75 in measurement before purchasing, as a minority of users reported size fit issues. Those who need HEPA-level filtration or medicalgrade air cleaning should look at higher-rated options instead.\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\u003eStrong particle capture with \u003cstrong\u003eMERV 11\u003c\/strong\u003e media that balances filtration and airflow.\u003c\/li\u003e\n\u003cli\u003eLonger life than basic fiberglass filters thanks to electrostatic pleats and denser media.\u003c\/li\u003e\n\u003cli\u003eDurable beverage board frame with dual wire backing resists bending and moisture.\u003c\/li\u003e\n\u003cli\u003eGood value when buying a 12-pack for quarterly maintenance cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome buyers reported slight size or fit variations, so measure your filter slot first.\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\u003eElectrostatic pleated HVAC filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack count\u003c\/td\u003e\n\u003ctd\u003e12-pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated performance\u003c\/td\u003e\n\u003ctd\u003eMERV 11 (comparable to MPR 1200 \u0026amp; FPR 7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual size\u003c\/td\u003e\n\u003ctd\u003e12.88 x 21.50 x 0.75 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePleat density\u003c\/td\u003e\n\u003ctd\u003e14 pleats per ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame\u003c\/td\u003e\n\u003ctd\u003eBeverage board with dual wire backing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of manufacture\u003c\/td\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor most households with pets or seasonal allergy concerns, this 12-pack offers a practical balance of \u003cstrong\u003efiltration and value\u003c\/strong\u003e. The MERV 11 media and reinforced frame provide dependable particle removal and longer life than disposable fiberglass models, making it a sensible bulk buy for routine HVAC maintenance - provided you confirm the actual dimensions fit your system.\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\u003eReplace every 90 days for typical use; homes with heavy dust or many pets may benefit from more frequent changes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill a MERV 11 filter restrict airflow?\u003c\/strong\u003e\u003cbr\u003eMERV 11 balances particle capture and airflow and is designed to work in most residential furnaces and AC units without undue restriction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these filters made domestically?\u003c\/strong\u003e\u003cbr\u003eYes, they are manufactured 100% in the USA using recyclable, industrial-grade materials.\u003c\/p\u003e","brand":"Filterbuy","offers":[{"title":"Default Title","offer_id":48205609271515,"sku":"B01MFXDTUN","price":165.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/812HG8ylpzL._AC_SL1500_8538b331-5a2d-4c6c-b13c-d0fd299f41b0.jpg?v=1769795305","url":"https:\/\/gearmusthave.com\/products\/13x21-5x1-merv-11-air-filter-12-pack-pet-allergy-defense","provider":"GearMustHave","version":"1.0","type":"link"}