{"product_id":"filter-king-39x8x1-air-filter-4-pack-merv-8-pleated-filters","title":"Filter King 39x8x1 Air Filter 4-Pack - MERV 8 Pleated Filters","description":"\u003cp\u003eIn this review we look at the Filter King 39x8x1 Air Filter 4-pack, a straightforward replacement for 1 in HVAC slots where a balance of particle capture and airflow matters most. The bottom line: this pack is for homeowners who want a reliable, made in USA pleated filter rated MERV 8 that fits the common 39 in x 8 in opening and can last up to 90 days under normal conditions. It is not a specialty high-MERV allergy filter, but it does provide clear, measurable improvement in trapped dust and lint within 48 hours.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 8 rating:\u003c\/strong\u003e Offers effective capture of household dust, lint, and pollen while maintaining system airflow for most residential HVAC systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActual size:\u003c\/strong\u003e The filters are cut to an actual size of 39 in x 8 in x.75 in, ensuring the advertised fit for systems that specify 39x8x1 nominal filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-pack convenience:\u003c\/strong\u003e Four filters in a pack provide easy scheduled replacements for 3 to 12 months depending on recommended change intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Fully manufactured in the United States with EPA establishment number provided, which can matter to buyers prioritizing domestic production.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleated design:\u003c\/strong\u003e The pleats capture more particles than flat pads, extending usable life before replacement is needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast installation:\u003c\/strong\u003e Simple open, slide and close installation makes swaps quick for homeowners or maintenance staff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis product suits homeowners and renters with standard residential A\/C and furnace housings that accept 1 in nominal filters who want a solid mid-range filtration level without sacrificing airflow. It is a good fit for those who prefer buying replacement filters in multi-packs to keep a steady supply on hand and appreciate US manufacturing.\u003c\/p\u003e\u003cp\u003eIt is not aimed at users who need hospital-grade or very high MERV filtration for severe allergies or smoke mitigation; those buyers should consider higher MERV or specialized filters designed for those specific contaminants.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMade in USA construction gives consistent build quality and sourcing transparency.\u003c\/li\u003e\n\u003cli\u003ePleated design and MERV 8 capture common household particles efficiently without notable airflow loss.\u003c\/li\u003e\n\u003cli\u003eFour filters per pack simplify maintenance schedules and reduce shopping frequency.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eNominal thickness is 1 in but actual thickness is.75 in, so buyers should verify fit in tight housings.\u003c\/li\u003e\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\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated MERV\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal size\u003c\/td\u003e\n\u003ctd\u003e39 in x 8 in x 1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual size\u003c\/td\u003e\n\u003ctd\u003e39 in x 8 in x.75 in\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 - 90 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Filter King 39x8x1 4-pack is a practical, good-value choice for typical homes that need dependable particle capture without restricting airflow. With American manufacturing, a pleated MERV 8 design, and four replacements included, it is sensible for routine HVAC maintenance and offers clear performance gains in dust reduction within days.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill these fit a nominal 39x8x1 slot?\u003c\/strong\u003e\u003cbr\u003eYes, the filters are labelled 39x8x1 nominal and have an actual size of 39 in x 8 in x.75 in, so confirm your cabinet accepts the slightly under 1 in thickness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow often should they be changed?\u003c\/strong\u003e\u003cbr\u003eFilter King recommends changing 1 in filters every 30 to 90 days depending on pet load, occupancy and local air quality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo these reduce airflow?\u003c\/strong\u003e\u003cbr\u003eThe MERV 8 pleated design is intended to trap common particulates while maintaining normal residential airflow for most systems.\u003c\/p\u003e","brand":"Filter King","offers":[{"title":"Default Title","offer_id":48241588666587,"sku":"B0CPTBBLW1","price":62.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71TTLHmdE0L._AC_SL1500.jpg?v=1770924693","url":"https:\/\/gearmusthave.com\/products\/filter-king-39x8x1-air-filter-4-pack-merv-8-pleated-filters","provider":"GearMustHave","version":"1.0","type":"link"}