{"title":"All Air Filters","description":"\u003cp\u003eEvery Ironside filter in one place: pleated, electrostatically charged HVAC and furnace filters in every standard size and every rating from \u003cstrong\u003eMERV 6 to MERV 16\u003c\/strong\u003e, plus activated-carbon options for odors. All made in the USA and shipped flat-rate nationwide — same shipping on 1, 2 or 3 packs.\u003c\/p\u003e\u003cp\u003eBrowsing 1,400+ filters is the hard way. Use \u003ca href=\"\/pages\/find-my-filter\"\u003eFind My Filter\u003c\/a\u003e to jump straight to your size, or shop by protection level: \u003ca href=\"\/collections\/everyday-defense\"\u003eEveryday Defense (MERV 6–8)\u003c\/a\u003e, \u003ca href=\"\/collections\/allergy-pet\"\u003eAllergy \u0026amp; Pet (MERV 10–12)\u003c\/a\u003e, \u003ca href=\"\/collections\/maximum-protection\"\u003eMaximum Protection (MERV 13–16)\u003c\/a\u003e, or \u003ca href=\"\/collections\/odor-smoke\"\u003eOdor \u0026amp; Smoke (activated carbon)\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"10x10x1-merv-10","title":"10x10x1 MERV 10 Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 MERV 10 pleated air filter delivers allergy \u0026amp; pet defense for your home or office — engineered to keep your HVAC system running clean and your air clear.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures pet dander, mold spores, and fine allergens\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635828170994,"sku":"10x10x1M10-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635828203762,"sku":"10x10x1M10-3","price":43.99,"currency_code":"USD","in_stock":true},{"title":"4-Pack","offer_id":49635828236530,"sku":"10x10x1M10-4","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-10.jpg?v=1780790514"},{"product_id":"10x10x1-merv-12","title":"10x10x1 MERV 12 Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 MERV 12 pleated air filter delivers allergy \u0026amp; pet defense for your home or office — engineered to keep your HVAC system running clean and your air clear.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures pet dander, mold spores, and fine allergens\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635828367602,"sku":"10x10x1M12-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635828400370,"sku":"10x10x1M12-3","price":49.99,"currency_code":"USD","in_stock":true},{"title":"4-Pack","offer_id":49635828433138,"sku":"10x10x1M12-4","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-12.jpg?v=1780790514"},{"product_id":"10x10x1-merv-13-plus-carbon","title":"10x10x1 MERV 13 + Carbon Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 activated-carbon air filter pairs pleated filtration with a carbon layer to trap both airborne particles and the odors that come with cooking, pets, smoke, and VOCs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures everyday particles \u003cb\u003eplus neutralizes household odors\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635828564210,"sku":"10x10x1M13+C-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635828596978,"sku":"10x10x1M13+C-3","price":62.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-13-plus-carbon.jpg?v=1780790514"},{"product_id":"10x10x1-merv-13","title":"10x10x1 MERV 13 Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 MERV 13 pleated air filter delivers maximum protection for your home or office — engineered to keep your HVAC system running clean and your air clear.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures smoke, bacteria, virus carriers, and wildfire particulates\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635830202610,"sku":"10x10x1M13-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635830235378,"sku":"10x10x1M13-3","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-13.jpg?v=1780790514"},{"product_id":"10x10x1-merv-14-plus-carbon","title":"10x10x1 MERV 14 + Carbon Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 activated-carbon air filter pairs pleated filtration with a carbon layer to trap both airborne particles and the odors that come with cooking, pets, smoke, and VOCs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures everyday particles \u003cb\u003eplus neutralizes household odors\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635830366450,"sku":"10x10x1M14+C-2","price":61.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635830399218,"sku":"10x10x1M14+C-3","price":82.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-14-plus-carbon.jpg?v=1780790514"},{"product_id":"10x10x1-merv-14","title":"10x10x1 MERV 14 Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 MERV 14 pleated air filter delivers maximum protection for your home or office — engineered to keep your HVAC system running clean and your air clear.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures smoke, bacteria, virus carriers, and wildfire particulates\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635830530290,"sku":"10x10x1M14-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635830563058,"sku":"10x10x1M14-3","price":66.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-14.jpg?v=1780790514"},{"product_id":"10x10x1-merv-7-plus-carbon","title":"10x10x1 MERV 7 + Carbon Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 activated-carbon air filter pairs pleated filtration with a carbon layer to trap both airborne particles and the odors that come with cooking, pets, smoke, and VOCs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures everyday particles \u003cb\u003eplus neutralizes household odors\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635830694130,"sku":"10x10x1M7+C-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635830726898,"sku":"10x10x1M7+C-3","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-7-plus-carbon.jpg?v=1780790514"},{"product_id":"10x10x1-merv-7","title":"10x10x1 MERV 7 Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 MERV 7 pleated air filter delivers everyday defense for your home or office — engineered to keep your HVAC system running clean and your air clear.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures dust, lint, pollen, and dust mites\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635832332530,"sku":"10x10x1M7-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635832365298,"sku":"10x10x1M7-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-7.jpg?v=1780790514"},{"product_id":"10x10x1-merv-8","title":"10x10x1 MERV 8 Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 MERV 8 pleated air filter delivers everyday defense for your home or office — engineered to keep your HVAC system running clean and your air clear.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures dust, lint, pollen, and dust mites\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635832496370,"sku":"10x10x1M8-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635832529138,"sku":"10x10x1M8-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-8.jpg?v=1780790514"},{"product_id":"10x10x1-merv-8-pure-carbon","title":"10x10x1 MERV 8 Pure Carbon Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 activated-carbon air filter pairs pleated filtration with a carbon layer to trap both airborne particles and the odors that come with cooking, pets, smoke, and VOCs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures everyday particles \u003cb\u003eplus neutralizes household odors\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635832660210,"sku":"10x10x1PCP-2","price":44.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635832692978,"sku":"10x10x1PCP-3","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-8-pure-carbon.jpg?v=1780790514"},{"product_id":"10x10x1-merv-10-p-plus-carbon","title":"10x10x1 MERV 10 P + Carbon Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 activated-carbon air filter pairs pleated filtration with a carbon layer to trap both airborne particles and the odors that come with cooking, pets, smoke, and VOCs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures everyday particles \u003cb\u003eplus neutralizes household odors\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635834298610,"sku":"10x10x1PM10C-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635834331378,"sku":"10x10x1PM10C-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-10-p-plus-carbon.jpg?v=1780790514"},{"product_id":"10x10x1-merv-12-p-plus-carbon","title":"10x10x1 MERV 12 P + Carbon Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 activated-carbon air filter pairs pleated filtration with a carbon layer to trap both airborne particles and the odors that come with cooking, pets, smoke, and VOCs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures everyday particles \u003cb\u003eplus neutralizes household odors\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635834462450,"sku":"10x10x1PM12C-2","price":43.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635834495218,"sku":"10x10x1PM12C-3","price":57.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-12-p-plus-carbon.jpg?v=1780790514"},{"product_id":"10x10x1-merv-8-p-plus-carbon","title":"10x10x1 MERV 8 P + Carbon Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 activated-carbon air filter pairs pleated filtration with a carbon layer to trap both airborne particles and the odors that come with cooking, pets, smoke, and VOCs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures everyday particles \u003cb\u003eplus neutralizes household odors\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635834626290,"sku":"10x10x1PM8C-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635834659058,"sku":"10x10x1PM8C-3","price":53.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-8-p-plus-carbon.jpg?v=1780790514"},{"product_id":"10x10x1-merv-6-poly-green","title":"10x10x1 MERV 6 Poly Green Air Filter","description":"\u003cp\u003eThe Ironside 10x10x1 MERV 6 pleated air filter delivers everyday defense for your home or office — engineered to keep your HVAC system running clean and your air clear.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures dust, lint, pollen, and dust mites\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x10x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. Breathe better.\u003c\/b\u003e\u003c\/p\u003e","brand":"Ironside","offers":[{"title":"2-Pack","offer_id":49635834855666,"sku":"10x10x1PolyGreen-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":49635834888434,"sku":"10x10x1PolyGreen-3","price":39.99,"currency_code":"USD","in_stock":true},{"title":"4-Pack","offer_id":49635834921202,"sku":"10x10x1PolyGreen-4","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/6152\/5234\/files\/10x10x1-merv-6-poly-green.jpg?v=1780790514"},{"product_id":"10x20x1-merv-10","title":"10x20x1 MERV 10 Air Filter","description":"\u003cp\u003eThe Ironside 10x20x1 MERV 10 pleated air filter delivers allergy \u0026amp; pet defense for your home or office — engineered to keep your HVAC system running clean and your air clear.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCaptures pet dander, mold spores, and fine allergens\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue 10x20x1 fit\u003c\/b\u003e — sized to drop straight into standard HVAC and furnace systems\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged, moisture-resistant pleated media\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eReplace every 30–90 days for best airflow and efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eBuilt here. 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