{"product_id":"20x20x4-furnace-filter","title":"20x20x4 Furnace Filter","description":"\u003cdiv style=\"font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif; color: #1a2b4a; line-height: 1.6; font-size: 15px;\"\u003e\n\u003cdiv style=\"background: #F3F5F9; border-left: 3px solid #B85838; padding: 16px 20px; margin: 0 0 24px; border-radius: 4px;\"\u003e\n\u003cp style=\"margin: 0 0 4px; font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: #8a3f25;\"\u003eFurnace Filter Subscription\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 16px; color: #1a2b4a; font-weight: 600;\"\u003eNominal size: 20x20x4. Actual dimensions: 19.5 x 19.5 x 3.75 inches (19½ × 19½ × 3¾).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin: 0 0 24px;\"\u003eA pleated 4-inch furnace filter delivered monthly to every unit in your property — with SMS install reminders sent to tenants, and automatic confirmation back to you. Available in MERV 8 and MERV 11.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 20px; font-weight: 600; color: #1a2b4a; letter-spacing: -0.015em; margin: 32px 0 8px;\"\u003eDoes this fit your furnace?\u003c\/h2\u003e\n\u003cp style=\"margin: 0 0 12px; color: #4a5970;\"\u003eThis filter is for HVAC slots labeled \u003cstrong style=\"color: #1a2b4a;\"\u003e20x20x4\u003c\/strong\u003e (the standard \"nominal\" size). The actual filter measures 19.5 x 19.5 x 3.75 inches — slightly smaller than nominal so it slides cleanly into the slot without binding.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 8px; color: #4a5970;\"\u003eTo confirm fit:\u003c\/p\u003e\n\u003col style=\"margin: 0 0 24px; padding-left: 24px; color: #4a5970;\"\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003ePull out your current filter from the unit.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003eLook for the size printed on the cardboard frame — typically the nominal size (16x25x4, 20x25x4, etc.).\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003eIf you can't find a size label, measure the slot opening with a tape measure. The nominal size should be ½ inch larger than your slot dimensions in each direction.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 style=\"font-size: 20px; font-weight: 600; color: #1a2b4a; letter-spacing: -0.015em; margin: 32px 0 12px;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"background: #FFFFFF; border: 1px solid rgba(26,43,74,0.10); border-radius: 10px; overflow: hidden; margin: 0 0 24px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 11px 16px; color: #6b7a93; width: 200px; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003eNominal size\u003c\/td\u003e\n\u003ctd style=\"padding: 11px 16px; color: #1a2b4a; font-weight: 600; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003e20x20x4 (20×20×4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 11px 16px; color: #6b7a93; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003eActual dimensions\u003c\/td\u003e\n\u003ctd style=\"padding: 11px 16px; color: #1a2b4a; font-weight: 600; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003e19.5 x 19.5 x 3.75 inches (19½ × 19½ × 3¾)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 11px 16px; color: #6b7a93; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003eFilter media\u003c\/td\u003e\n\u003ctd style=\"padding: 11px 16px; color: #1a2b4a; font-weight: 600; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003ePleated synthetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 11px 16px; color: #6b7a93; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003eFrame\u003c\/td\u003e\n\u003ctd style=\"padding: 11px 16px; color: #1a2b4a; font-weight: 600; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003eBeverage board (recyclable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 11px 16px; color: #6b7a93; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003eMERV options\u003c\/td\u003e\n\u003ctd style=\"padding: 11px 16px; color: #1a2b4a; font-weight: 600; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003e8, 11 — \u003ca href=\"\/pages\/merv-guide\" style=\"color: #b85838; text-decoration: underline;\"\u003esee MERV guide\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 11px 16px; color: #6b7a93; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003eReplacement frequency\u003c\/td\u003e\n\u003ctd style=\"padding: 11px 16px; color: #1a2b4a; font-weight: 600; border-bottom: 1px solid rgba(26,43,74,0.06);\"\u003eEvery 30 days (recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 11px 16px; color: #6b7a93;\"\u003eCompatibility\u003c\/td\u003e\n\u003ctd style=\"padding: 11px 16px; color: #1a2b4a; font-weight: 600;\"\u003eMost residential furnaces, central AC, and air handlers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"filter-flow","offers":[{"title":"Merv 8 \/ 2-pack","offer_id":43372750340185,"sku":"20x20x4-M8-2P","price":90.99,"currency_code":"USD","in_stock":true},{"title":"Merv 8 \/ 3-pack","offer_id":43372750372953,"sku":"20x20x4-M8-3P","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Merv 8 \/ 4-pack","offer_id":43372750405721,"sku":"20x20x4-M8-4P","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Merv 11 \/ 2-pack","offer_id":43379318161497,"sku":"20x20x4-M11-2P","price":96.99,"currency_code":"USD","in_stock":true},{"title":"Merv 11 \/ 3-pack","offer_id":43379318194265,"sku":"20x20x4-M11-3P","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Merv 11 \/ 4-pack","offer_id":43379318227033,"sku":"20x20x4-M11-4P","price":122.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/2229\/1545\/files\/filter-flow-filter-square-thick-merv-8-single.webp?v=1781012288","url":"https:\/\/filter-flow.com\/products\/20x20x4-furnace-filter","provider":"Filterflow","version":"1.0","type":"link"}