{"product_id":"aerostar-20x25x4-merv-11-pleated-air-filters-6-pack","title":"Aerostar 20x25x4 MERV 11 Pleated Air Filters - 6 Pack","description":"\u003cp\u003eIn this review the Aerostar 20x25x4 MERV 11 pleated air filters are judged as a practical upgrade for homes seeking better particle capture without heavy flow loss. The kit contains six filters with an actual size of 19 1\/2' x 24 1\/2' x 3 3\/4' and targets microscopic allergens between 0.3 - 1.0 microns. The single biggest reason to buy is the combination of \u003cstrong\u003eMERV 11 filtration\u003c\/strong\u003e and 100% synthetic electrostatic media that captures common household irritants while remaining inexpensive to replace every few months.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eActual size:\u003c\/strong\u003e The filters measure 19 1\/2' x 24 1\/2' x 3 3\/4', fitting cabinets that accept nominal 20x25x4 units and making replacement straightforward.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 11 efficiency:\u003c\/strong\u003e Captures lint, dust mites, spores, pollen, pet dander and smoke in the 0.3 - 1.0 micron range for noticeably cleaner indoor air.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrostatic media:\u003c\/strong\u003e Made from 100% synthetic electrostatically charged material to improve particle capture while keeping \u003cstrong\u003elow air flow resistance\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix-count value:\u003c\/strong\u003e The 6 pack provides multiple changes, offering lower cost per filter for routine maintenance across a season.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer pedigree:\u003c\/strong\u003e Manufactured by a major filtration supplier, which supports consistent construction and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Aerostar MERV 11 pack is best for households with pets, allergy sufferers, or those concerned by fine dust and smoke who need better filtration than basic fiberglass filters. It suits homeowners who want a balance of particle capture and reasonable airflow without upgrading to a high-pressure industrial filter.\u003c\/p\u003e\u003cp\u003eIt may not be ideal for systems that need exact nominal dimensions larger than the actual size given, or for users who require hospital-grade filtration; customers with tight fit cabinets should measure the slot since some buyers reported the width can be slightly short in certain housings.\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 removal in the 0.3 - 1.0 micron range due to \u003cstrong\u003eMERV 11\u003c\/strong\u003e electrostatic media.\u003c\/li\u003e\n\u003cli\u003eSix filters per pack deliver solid value for regular replacement cycles.\u003c\/li\u003e\n\u003cli\u003eLow airflow resistance helps maintain HVAC efficiency and reduce motor strain.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eActual dimensions are slightly smaller than nominal 20x25x4, and a few users reported fitting or gap issues in some housings.\u003c\/li\u003e\n\u003cli\u003eSome customers noted occasional damage or variability in sturdiness out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal size\u003c\/td\u003e\n\u003ctd\u003e20 x 25 x 4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual size\u003c\/td\u003e\n\u003ctd\u003e19 1\/2 x 24 1\/2 x 3 3\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMERV rating\u003c\/td\u003e\n\u003ctd\u003eMERV 11 (comparable to MPR 1000-1200, FPR 7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedia\u003c\/td\u003e\n\u003ctd\u003e100% synthetic electrostatic\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\u003eRecommended change interval\u003c\/td\u003e\n\u003ctd\u003eEvery 3-6 months for 3'-5' filters; replace as needed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eFiltration Group\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Aerostar 20x25x4 MERV 11 six-pack is a practical, cost-conscious choice for homeowners who need reliable removal of dust, pollen, pet dander and smoke without overly restricting airflow. It offers solid value and improved indoor air quality, but buyers should check cabinet dimensions before ordering to avoid fit issues.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill these filters fit a nominal 20x25x4 slot?\u003c\/strong\u003e\u003cbr\u003eThey are nominally 20x25x4 but the actual size is 19 1\/2' x 24 1\/2' x 3 3\/4', so measure your opening if precise fit is required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow often should these be replaced?\u003c\/strong\u003e\u003cbr\u003eReplace every 3-6 months as a guideline; homes with pets or heavy particulate may need more frequent changes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo they reduce airflow to the HVAC system?\u003c\/strong\u003e\u003cbr\u003eThe 100% synthetic electrostatic media is designed for high efficiency with low air flow resistance, helping maintain system performance.\u003c\/p\u003e","brand":"Aerostar","offers":[{"title":"Default Title","offer_id":48204101189851,"sku":"B01D94DAD2","price":145.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71OwaxJ4bwL._SL1500.jpg?v=1770265758","url":"https:\/\/gearmusthave.com\/products\/aerostar-20x25x4-merv-11-pleated-air-filters-6-pack","provider":"GearMustHave","version":"1.0","type":"link"}