{"title":"Air Filters \u0026 Indoor Air Quality","description":"\u003cp\u003eProfessional air filters \u0026amp; indoor air quality for HVAC contractors and homeowners. All items ship same-day from Houston. 30-day returns.\u003c\/p\u003e","products":[{"product_id":"merv-13-pleated-ac-furnace-filter-20x25x1-inch-6-pack","title":"MERV 13 Pleated AC Furnace Filter 20x25x1 Inch 6 Pack","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eMERV 13 Pleated AC Furnace Filter 20x25x1 Inch 6 Pack\u003c\/h2\u003e\n    \u003cp\u003e20\"x25\"x1\" MERV 13 pleated air filters for residential HVAC systems. MERV 13 filtration captures bacteria, smoke particles, and allergens as small as 0.3 microns while maintaining proper airflow to protect your equipment.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eMERV 13 rating — hospital-level filtration for homes\u003c\/li\u003e\n\u003cli\u003e6-pack for a full year of replacements (change every 60-90 days)\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged media captures particles without restricting airflow\u003c\/li\u003e\n\u003cli\u003eRigid cardboard frame for secure fit — no gaps around edges\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eApplication: Residential HVAC systems\u003c\/li\u003e\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eMERV 13 Pleated AC Furnace Filter 20x25x1 Inch 6 Pack\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow often should I change my air filter?\u003c\/h4\u003e\n\u003cp\u003e1\" filters: every 60-90 days (monthly if you have pets). 4-5\" media filters: every 6-12 months. A dirty filter restricts airflow, raises energy bills, and can freeze your evaporator coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs MERV 13 too restrictive for my system?\u003c\/h4\u003e\n\u003cp\u003eMost modern furnaces and air handlers handle MERV 13 without issues. Older systems with weak blower motors may need MERV 11 or lower. If you notice reduced airflow after upgrading, step down one MERV level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between MERV 8, 11, and 13?\u003c\/h4\u003e\n\u003cp\u003eMERV 8 catches dust and pollen. MERV 11 adds mold spores and pet dander. MERV 13 adds bacteria and smoke particles. Higher MERV = cleaner air but slightly more airflow resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eDoes the filter direction matter?\u003c\/h4\u003e\n\u003cp\u003eYes — install with the arrow pointing toward the blower\/furnace (in the direction of airflow). The arrow is printed on the filter frame.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004090597747,"sku":"NHVAC-AIR -BXILK1","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/71nyggjUNYL._AC_SL1500_239fba79-8182-443c-aa20-9c2c47c24a72.jpg?v=1781918217"},{"product_id":"merv-13-pleated-ac-furnace-filter-16x25x1-inch-6-pack","title":"MERV 13 Pleated AC Furnace Filter 16x25x1 Inch 6 Pack","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eMERV 13 Pleated AC Furnace Filter 16x25x1 Inch 6 Pack\u003c\/h2\u003e\n    \u003cp\u003e16\"x25\"x1\" MERV 13 pleated air filters for residential HVAC systems. MERV 13 filtration captures bacteria, smoke particles, and allergens as small as 0.3 microns while maintaining proper airflow to protect your equipment.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eMERV 13 rating — hospital-level filtration for homes\u003c\/li\u003e\n\u003cli\u003e6-pack for a full year of replacements (change every 60-90 days)\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged media captures particles without restricting airflow\u003c\/li\u003e\n\u003cli\u003eRigid cardboard frame for secure fit — no gaps around edges\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eApplication: Residential HVAC systems\u003c\/li\u003e\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eMERV 13 Pleated AC Furnace Filter 16x25x1 Inch 6 Pack\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow often should I change my air filter?\u003c\/h4\u003e\n\u003cp\u003e1\" filters: every 60-90 days (monthly if you have pets). 4-5\" media filters: every 6-12 months. A dirty filter restricts airflow, raises energy bills, and can freeze your evaporator coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs MERV 13 too restrictive for my system?\u003c\/h4\u003e\n\u003cp\u003eMost modern furnaces and air handlers handle MERV 13 without issues. Older systems with weak blower motors may need MERV 11 or lower. If you notice reduced airflow after upgrading, step down one MERV level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between MERV 8, 11, and 13?\u003c\/h4\u003e\n\u003cp\u003eMERV 8 catches dust and pollen. MERV 11 adds mold spores and pet dander. MERV 13 adds bacteria and smoke particles. Higher MERV = cleaner air but slightly more airflow resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eDoes the filter direction matter?\u003c\/h4\u003e\n\u003cp\u003eYes — install with the arrow pointing toward the blower\/furnace (in the direction of airflow). The arrow is printed on the filter frame.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004090663283,"sku":"NHVAC-AIR -ISWGRH","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/71nyggjUNYL._AC_SL1500_71426e60-3065-4344-87ec-c9d093596d72.jpg?v=1781918213"},{"product_id":"merv-13-pleated-ac-furnace-filter-20x20x1-inch-6-pack","title":"MERV 13 Pleated AC Furnace Filter 20x20x1 Inch 6 Pack","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eMERV 13 Pleated AC Furnace Filter 20x20x1 Inch 6 Pack\u003c\/h2\u003e\n    \u003cp\u003e20\"x20\"x1\" MERV 13 pleated air filters for residential HVAC systems. MERV 13 filtration captures bacteria, smoke particles, and allergens as small as 0.3 microns while maintaining proper airflow to protect your equipment.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eMERV 13 rating — hospital-level filtration for homes\u003c\/li\u003e\n\u003cli\u003e6-pack for a full year of replacements (change every 60-90 days)\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged media captures particles without restricting airflow\u003c\/li\u003e\n\u003cli\u003eRigid cardboard frame for secure fit — no gaps around edges\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eApplication: Residential HVAC systems\u003c\/li\u003e\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eMERV 13 Pleated AC Furnace Filter 20x20x1 Inch 6 Pack\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow often should I change my air filter?\u003c\/h4\u003e\n\u003cp\u003e1\" filters: every 60-90 days (monthly if you have pets). 4-5\" media filters: every 6-12 months. A dirty filter restricts airflow, raises energy bills, and can freeze your evaporator coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs MERV 13 too restrictive for my system?\u003c\/h4\u003e\n\u003cp\u003eMost modern furnaces and air handlers handle MERV 13 without issues. Older systems with weak blower motors may need MERV 11 or lower. If you notice reduced airflow after upgrading, step down one MERV level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between MERV 8, 11, and 13?\u003c\/h4\u003e\n\u003cp\u003eMERV 8 catches dust and pollen. MERV 11 adds mold spores and pet dander. MERV 13 adds bacteria and smoke particles. Higher MERV = cleaner air but slightly more airflow resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eDoes the filter direction matter?\u003c\/h4\u003e\n\u003cp\u003eYes — install with the arrow pointing toward the blower\/furnace (in the direction of airflow). The arrow is printed on the filter frame.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004090696051,"sku":"NHVAC-AIR -FIFD7U","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/71nyggjUNYL._AC_SL1500_3820caa9-0886-472f-9904-a601ad8daf1f.jpg?v=1781918215"},{"product_id":"merv-11-pleated-ac-furnace-filter-16x20x1-inch-6-pack","title":"MERV 11 Pleated AC Furnace Filter 16x20x1 Inch 6 Pack","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eMERV 11 Pleated AC Furnace Filter 16x20x1 Inch 6 Pack\u003c\/h2\u003e\n    \u003cp\u003e16\"x20\"x1\" MERV 11 pleated air filters for residential HVAC systems. MERV 11 filtration captures dust, pollen, mold spores, and pet dander while maintaining proper airflow to protect your equipment.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eMERV 11 rating — excellent dust and allergen capture\u003c\/li\u003e\n\u003cli\u003e6-pack for a full year of replacements (change every 60-90 days)\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged media captures particles without restricting airflow\u003c\/li\u003e\n\u003cli\u003eRigid cardboard frame for secure fit — no gaps around edges\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eApplication: Residential HVAC systems\u003c\/li\u003e\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eMERV 11 Pleated AC Furnace Filter 16x20x1 Inch 6 Pack\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow often should I change my air filter?\u003c\/h4\u003e\n\u003cp\u003e1\" filters: every 60-90 days (monthly if you have pets). 4-5\" media filters: every 6-12 months. A dirty filter restricts airflow, raises energy bills, and can freeze your evaporator coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs MERV 13 too restrictive for my system?\u003c\/h4\u003e\n\u003cp\u003eMost modern furnaces and air handlers handle MERV 13 without issues. Older systems with weak blower motors may need MERV 11 or lower. If you notice reduced airflow after upgrading, step down one MERV level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between MERV 8, 11, and 13?\u003c\/h4\u003e\n\u003cp\u003eMERV 8 catches dust and pollen. MERV 11 adds mold spores and pet dander. MERV 13 adds bacteria and smoke particles. Higher MERV = cleaner air but slightly more airflow resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eDoes the filter direction matter?\u003c\/h4\u003e\n\u003cp\u003eYes — install with the arrow pointing toward the blower\/furnace (in the direction of airflow). The arrow is printed on the filter frame.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004090728819,"sku":"NHVAC-AIR -UJDP19","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/71nyggjUNYL._AC_SL1500_04d4725a-b2da-4809-9c60-fc204ebc77b3.jpg?v=1781918211"},{"product_id":"merv-8-pleated-ac-furnace-filter-20x25x4-inch-2-pack-media","title":"MERV 8 Pleated AC Furnace Filter 20x25x4 Inch 2 Pack Media","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eMERV 8 Pleated AC Furnace Filter 20x25x4 Inch 2 Pack Media\u003c\/h2\u003e\n    \u003cp\u003e20\"x25\"x4\" MERV 8 pleated air filters for residential HVAC systems. MERV 8 filtration captures dust, pollen, mold spores, and pet dander while maintaining proper airflow to protect your equipment.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eMERV 8 rating — excellent dust and allergen capture\u003c\/li\u003e\n\u003cli\u003e2-pack for 6 months of protection\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged media captures particles without restricting airflow\u003c\/li\u003e\n\u003cli\u003eRigid cardboard frame for secure fit — no gaps around edges\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eApplication: Residential HVAC systems\u003c\/li\u003e\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eMERV 8 Pleated AC Furnace Filter 20x25x4 Inch 2 Pack Media\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow often should I change my air filter?\u003c\/h4\u003e\n\u003cp\u003e1\" filters: every 60-90 days (monthly if you have pets). 4-5\" media filters: every 6-12 months. A dirty filter restricts airflow, raises energy bills, and can freeze your evaporator coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs MERV 13 too restrictive for my system?\u003c\/h4\u003e\n\u003cp\u003eMost modern furnaces and air handlers handle MERV 13 without issues. Older systems with weak blower motors may need MERV 11 or lower. If you notice reduced airflow after upgrading, step down one MERV level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between MERV 8, 11, and 13?\u003c\/h4\u003e\n\u003cp\u003eMERV 8 catches dust and pollen. MERV 11 adds mold spores and pet dander. MERV 13 adds bacteria and smoke particles. Higher MERV = cleaner air but slightly more airflow resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eDoes the filter direction matter?\u003c\/h4\u003e\n\u003cp\u003eYes — install with the arrow pointing toward the blower\/furnace (in the direction of airflow). The arrow is printed on the filter frame.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004090761587,"sku":"NHVAC-AIR -XBR96U","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/71nyggjUNYL._AC_SL1500_10d6f8fd-e83e-4b28-8331-8a9d21455dba.jpg?v=1781918219"},{"product_id":"uv-light-for-hvac-24v-germicidal-ultraviolet-coil-sterilizer","title":"UV Light for HVAC 24V Germicidal Ultraviolet Coil Sterilizer","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eUV Light for HVAC 24V Germicidal Ultraviolet Coil Sterilizer\u003c\/h2\u003e\n    \u003cp\u003eUV Light for HVAC 24V Germicidal Ultraviolet Coil Sterilizer for improved indoor air quality in residential HVAC systems. Professional-grade component for healthier indoor air. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eImproves indoor air quality\u003c\/li\u003e\n\u003cli\u003eCompatible with standard residential HVAC systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eApplication: Residential HVAC systems\u003c\/li\u003e\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eUV Light for HVAC 24V Germicidal Ultraviolet Coil Sterilizer\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow often should I change my air filter?\u003c\/h4\u003e\n\u003cp\u003e1\" filters: every 60-90 days (monthly if you have pets). 4-5\" media filters: every 6-12 months. A dirty filter restricts airflow, raises energy bills, and can freeze your evaporator coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs MERV 13 too restrictive for my system?\u003c\/h4\u003e\n\u003cp\u003eMost modern furnaces and air handlers handle MERV 13 without issues. Older systems with weak blower motors may need MERV 11 or lower. If you notice reduced airflow after upgrading, step down one MERV level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between MERV 8, 11, and 13?\u003c\/h4\u003e\n\u003cp\u003eMERV 8 catches dust and pollen. MERV 11 adds mold spores and pet dander. MERV 13 adds bacteria and smoke particles. Higher MERV = cleaner air but slightly more airflow resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eDoes the filter direction matter?\u003c\/h4\u003e\n\u003cp\u003eYes — install with the arrow pointing toward the blower\/furnace (in the direction of airflow). The arrow is printed on the filter frame.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004090827123,"sku":"NHVAC-AIR -KM8B9Q","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/71nyggjUNYL._AC_SL1500_288533e1-88c6-4a2b-85f0-5343dc2a6262.jpg?v=1781918222"},{"product_id":"uv-replacement-bulb-14-inch-24v-hvac-air-purifier-lamp","title":"UV Replacement Bulb 14 Inch 24V HVAC Air Purifier Lamp","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eUV Replacement Bulb 14 Inch 24V HVAC Air Purifier Lamp\u003c\/h2\u003e\n    \u003cp\u003eUV Replacement Bulb 14 Inch 24V HVAC Air Purifier Lamp for improved indoor air quality in residential HVAC systems. Professional-grade component for healthier indoor air. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eImproves indoor air quality\u003c\/li\u003e\n\u003cli\u003eCompatible with standard residential HVAC systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eApplication: Residential HVAC systems\u003c\/li\u003e\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eUV Replacement Bulb 14 Inch 24V HVAC Air Purifier Lamp\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow often should I change my air filter?\u003c\/h4\u003e\n\u003cp\u003e1\" filters: every 60-90 days (monthly if you have pets). 4-5\" media filters: every 6-12 months. A dirty filter restricts airflow, raises energy bills, and can freeze your evaporator coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs MERV 13 too restrictive for my system?\u003c\/h4\u003e\n\u003cp\u003eMost modern furnaces and air handlers handle MERV 13 without issues. Older systems with weak blower motors may need MERV 11 or lower. If you notice reduced airflow after upgrading, step down one MERV level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between MERV 8, 11, and 13?\u003c\/h4\u003e\n\u003cp\u003eMERV 8 catches dust and pollen. MERV 11 adds mold spores and pet dander. MERV 13 adds bacteria and smoke particles. Higher MERV = cleaner air but slightly more airflow resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eDoes the filter direction matter?\u003c\/h4\u003e\n\u003cp\u003eYes — install with the arrow pointing toward the blower\/furnace (in the direction of airflow). The arrow is printed on the filter frame.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004090859891,"sku":"NHVAC-AIR -XHHVMD","price":24.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/71nyggjUNYL._AC_SL1500_15ec1e16-4af2-4d84-a347-b624cb0aa7db.jpg?v=1781918224"},{"product_id":"electronic-air-cleaner-pre-filter-washable-16x25x1-inch","title":"Electronic Air Cleaner Pre-Filter Washable 16x25x1 Inch","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eElectronic Air Cleaner Pre-Filter Washable 16x25x1 Inch\u003c\/h2\u003e\n    \u003cp\u003eElectronic Air Cleaner Pre-Filter Washable 16x25x1 Inch for improved indoor air quality in residential HVAC systems. Professional-grade component for healthier indoor air. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eImproves indoor air quality\u003c\/li\u003e\n\u003cli\u003eCompatible with standard residential HVAC systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eApplication: Residential HVAC systems\u003c\/li\u003e\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eElectronic Air Cleaner Pre-Filter Washable 16x25x1 Inch\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow often should I change my air filter?\u003c\/h4\u003e\n\u003cp\u003e1\" filters: every 60-90 days (monthly if you have pets). 4-5\" media filters: every 6-12 months. A dirty filter restricts airflow, raises energy bills, and can freeze your evaporator coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs MERV 13 too restrictive for my system?\u003c\/h4\u003e\n\u003cp\u003eMost modern furnaces and air handlers handle MERV 13 without issues. Older systems with weak blower motors may need MERV 11 or lower. If you notice reduced airflow after upgrading, step down one MERV level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between MERV 8, 11, and 13?\u003c\/h4\u003e\n\u003cp\u003eMERV 8 catches dust and pollen. MERV 11 adds mold spores and pet dander. MERV 13 adds bacteria and smoke particles. Higher MERV = cleaner air but slightly more airflow resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eDoes the filter direction matter?\u003c\/h4\u003e\n\u003cp\u003eYes — install with the arrow pointing toward the blower\/furnace (in the direction of airflow). The arrow is printed on the filter frame.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004090892659,"sku":"NHVAC-AIR -CXZT6L","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/71nyggjUNYL._AC_SL1500.jpg?v=1781918207"},{"product_id":"humidifier-water-panel-evaporator-pad-10x13-inch-whole-house","title":"Humidifier Water Panel Evaporator Pad 10x13 Inch Whole House","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eHumidifier Water Panel Evaporator Pad 10x13 Inch Whole House\u003c\/h2\u003e\n    \u003cp\u003eHumidifier Water Panel Evaporator Pad 10x13 Inch Whole House for improved indoor air quality in residential HVAC systems. Professional-grade component for healthier indoor air. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eImproves indoor air quality\u003c\/li\u003e\n\u003cli\u003eCompatible with standard residential HVAC systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eApplication: Residential HVAC systems\u003c\/li\u003e\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eHumidifier Water Panel Evaporator Pad 10x13 Inch Whole House\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow often should I change my air filter?\u003c\/h4\u003e\n\u003cp\u003e1\" filters: every 60-90 days (monthly if you have pets). 4-5\" media filters: every 6-12 months. A dirty filter restricts airflow, raises energy bills, and can freeze your evaporator coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs MERV 13 too restrictive for my system?\u003c\/h4\u003e\n\u003cp\u003eMost modern furnaces and air handlers handle MERV 13 without issues. Older systems with weak blower motors may need MERV 11 or lower. If you notice reduced airflow after upgrading, step down one MERV level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between MERV 8, 11, and 13?\u003c\/h4\u003e\n\u003cp\u003eMERV 8 catches dust and pollen. MERV 11 adds mold spores and pet dander. MERV 13 adds bacteria and smoke particles. Higher MERV = cleaner air but slightly more airflow resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eDoes the filter direction matter?\u003c\/h4\u003e\n\u003cp\u003eYes — install with the arrow pointing toward the blower\/furnace (in the direction of airflow). The arrow is printed on the filter frame.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004090925427,"sku":"NHVAC-AIR -OB9WU7","price":14.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/71nyggjUNYL._AC_SL1500_0ef0cd75-1116-43c7-9960-bf3b5362b8ec.jpg?v=1781919099"},{"product_id":"duct-booster-fan-6-inch-inline-240-cfm-register-booster","title":"Duct Booster Fan 6 Inch Inline 240 CFM Register Booster","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eDuct Booster Fan 6 Inch Inline 240 CFM Register Booster\u003c\/h2\u003e\n    \u003cp\u003eDuct Booster Fan 6 Inch Inline 240 CFM Register Booster for improved indoor air quality in residential HVAC systems. Professional-grade component for healthier indoor air. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eImproves indoor air quality\u003c\/li\u003e\n\u003cli\u003eCompatible with standard residential HVAC systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eApplication: Residential HVAC systems\u003c\/li\u003e\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eDuct Booster Fan 6 Inch Inline 240 CFM Register Booster\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow often should I change my air filter?\u003c\/h4\u003e\n\u003cp\u003e1\" filters: every 60-90 days (monthly if you have pets). 4-5\" media filters: every 6-12 months. A dirty filter restricts airflow, raises energy bills, and can freeze your evaporator coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs MERV 13 too restrictive for my system?\u003c\/h4\u003e\n\u003cp\u003eMost modern furnaces and air handlers handle MERV 13 without issues. Older systems with weak blower motors may need MERV 11 or lower. If you notice reduced airflow after upgrading, step down one MERV level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between MERV 8, 11, and 13?\u003c\/h4\u003e\n\u003cp\u003eMERV 8 catches dust and pollen. MERV 11 adds mold spores and pet dander. MERV 13 adds bacteria and smoke particles. Higher MERV = cleaner air but slightly more airflow resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eDoes the filter direction matter?\u003c\/h4\u003e\n\u003cp\u003eYes — install with the arrow pointing toward the blower\/furnace (in the direction of airflow). The arrow is printed on the filter frame.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004090990963,"sku":"NHVAC-AIR -ZKLIHT","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/7158r4aS2nL._AC_SL1500.jpg?v=1781918205"}],"url":"https:\/\/nationalhvacparts.com\/collections\/air-filters-indoor-air-quality.oembed","provider":"National HVAC Parts","version":"1.0","type":"link"}