{"product_id":"20x20x1-merv-8-4pack","title":"ApexPuri 20×20×1 MERV 8 Air Filter · Most Reordered 4-Pack","description":"\u003csection class=\"apex-pdp\"\u003e\n  \u003ch2\u003e20×20×1 MERV 8 — the most reordered size in U.S. homes.\u003c\/h2\u003e\n  \u003cp\u003e\u003cem\u003eStandard mid-size return slot on most modern furnace and AC systems. The right baseline for everyday dust, lint, and pollen capture without HVAC strain.\u003c\/em\u003e\u003c\/p\u003e\n  \u003col\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHonest sizing, no rattle.\u003c\/strong\u003e Nominal 20×20×1, actual 19.50 × 19.50 × 0.75 in. Both numbers print on the label so you can verify before opening.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReinforced beverage-board frame.\u003c\/strong\u003e ~30% thicker than typical cardboard. No bow under blower suction.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eElectrostatic pleated media.\u003c\/strong\u003e Captures dust, lint, pollen, and pet hair while keeping airflow balanced.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBuilt to last 90 days\u003c\/strong\u003e in average American homes. Subscribe and we ship the next pack at swap time.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eArrive-Safe packaging.\u003c\/strong\u003e Double-wall corrugate with nested cells. Damaged on arrival? One photo, free replacement.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMade for U.S. furnaces \u0026amp; ACs.\u003c\/strong\u003e Fits standard residential return slots without modification.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eSpecifications\u003c\/h2\u003e\n  \u003ctable\u003e\n    \u003ctr\u003e\n\u003cth\u003eNominal size\u003c\/th\u003e\n\u003ctd\u003e20 × 20 × 1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eActual size (verified)\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003e19.50 × 19.50 × 0.75 in\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMERV rating\u003c\/th\u003e\n\u003ctd\u003eMERV 8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eEquivalent retail tier\u003c\/th\u003e\n\u003ctd\u003e~MPR 600 · FPR 5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMedia\u003c\/th\u003e\n\u003ctd\u003eElectrostatic pleated synthetic, 12+ pleats per filter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFrame\u003c\/th\u003e\n\u003ctd\u003eReinforced beverage-board, double-fold corners\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRecommended life\u003c\/th\u003e\n\u003ctd\u003e~90 days in average dust conditions; 60 days for pet\/pollen-heavy homes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAirflow direction\u003c\/th\u003e\n\u003ctd\u003eArrow on frame points toward blower\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePack quantity\u003c\/th\u003e\n\u003ctd\u003e4 filters\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eAP-20-20-1-M8-4\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eQuestions about this size\u003c\/h2\u003e\n  \u003cdetails open\u003e\u003csummary\u003e\u003cstrong\u003eWill this fit a standard 20×20×1 return?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Actual frame dimensions are 19.50 × 19.50 × 0.75 in, the standard residential return slot size labeled \"20×20×1\". If your existing filter measures within ¼ in of those numbers, this filter will seat without gap.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow does 20×20×1 compare to other brands?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eActual dimensions are the standard 19.50 × 19.50 × 0.75 in — within ±0.05 in of ASHRAE convention. Many low-cost brands drift up to ½ in below standard, causing the gap-and-whistle issues you see in their one-star reviews.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eShould I run MERV 8 or step up?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eMERV 8 is the right baseline for most homes — captures dust, lint, pollen, and larger dander while keeping airflow balanced. Step up to MERV 11 if you have pets or allergies. MERV 13 only if HVAC tolerates the static pressure.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow often should I replace?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003e90 days in average homes. 60 days with pets or heavy pollen. 30 days during indoor renovation. Subscribe \u0026amp; Save defaults to 90 days; change cadence anytime.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat if my filter arrives crushed?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eEmail us one photo — we ship a free replacement next business day. No return label required. See \u003ca href=\"\/pages\/fit-guarantee\"\u003eFit Guarantee policy\u003c\/a\u003e.\u003c\/p\u003e\u003c\/details\u003e\n\n  \u003cp\u003e\u003ca href=\"\/pages\/support#fit\"\u003e→ Run Fit Check first\u003c\/a\u003e · \u003ca href=\"\/pages\/merv-guide\"\u003e→ Open MERV Guide\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e","brand":"ApexPuri","offers":[{"title":"Default Title","offer_id":51852130943108,"sku":"AP-20-20-1-M8-4","price":29.96,"currency_code":"USD","in_stock":false}],"url":"https:\/\/apexpuri.com\/products\/20x20x1-merv-8-4pack","provider":"APEX PURI","version":"1.0","type":"link"}