![AIRX WICKED CLEAN AIR. HEALTH 18x20x1 MERV 13 Pleated Air Filter - Made in the USA - Box of 6 - Amazon.com AIRX WICKED CLEAN AIR. HEALTH 18x20x1 MERV 13 Pleated Air Filter - Made in the USA - Box of 6 - Amazon.com](https://m.media-amazon.com/images/I/51n0qQHg6YL.jpg)
AIRX WICKED CLEAN AIR. HEALTH 18x20x1 MERV 13 Pleated Air Filter - Made in the USA - Box of 6 - Amazon.com
![Filtrete 18-in W x 20-in L x 1-in MERV 2 Basic Flat Panel Basic Flat Air Filter (2-Pack) in the Air Filters department at Lowes.com Filtrete 18-in W x 20-in L x 1-in MERV 2 Basic Flat Panel Basic Flat Air Filter (2-Pack) in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/23c4aa68-183b-4fb9-9225-7ec5be4c6759/65753026.jpg?size=pdhism)
Filtrete 18-in W x 20-in L x 1-in MERV 2 Basic Flat Panel Basic Flat Air Filter (2-Pack) in the Air Filters department at Lowes.com
![Filtrete 18-in W x 20-in L x 1-in MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com Filtrete 18-in W x 20-in L x 1-in MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/811b13e6-6b5c-49f3-ab98-4e8a763c98d2/63647282.jpg)
Filtrete 18-in W x 20-in L x 1-in MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com
![Koch Air Filter 18 x 20 x 1 MERV 8 Pleated Air Filter 12 Pack - Hepa Filter Sales - HepaFilterSales.com -- We Deliver Breathing Easier Koch Air Filter 18 x 20 x 1 MERV 8 Pleated Air Filter 12 Pack - Hepa Filter Sales - HepaFilterSales.com -- We Deliver Breathing Easier](https://hepafiltersales.com/cdn/shop/products/the_one_360x_9648590e-21c5-49fe-abea-391315a60eac_600x.png?v=1674082860)
Koch Air Filter 18 x 20 x 1 MERV 8 Pleated Air Filter 12 Pack - Hepa Filter Sales - HepaFilterSales.com -- We Deliver Breathing Easier
![18" X 20 Steel Return Air Filter Grille for 1" Filter - Removable Face/Door - Flat Stamped Face - White [Outer Dimensions: 20.5 X 21.75] - Amazon.com 18" X 20 Steel Return Air Filter Grille for 1" Filter - Removable Face/Door - Flat Stamped Face - White [Outer Dimensions: 20.5 X 21.75] - Amazon.com](https://m.media-amazon.com/images/I/81sYDFgiTVL.jpg)
18" X 20 Steel Return Air Filter Grille for 1" Filter - Removable Face/Door - Flat Stamped Face - White [Outer Dimensions: 20.5 X 21.75] - Amazon.com
![HDX 18 in. x 20 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 11 HDX1P7-011820 - The Home Depot HDX 18 in. x 20 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 11 HDX1P7-011820 - The Home Depot](https://images.thdstatic.com/productImages/d549e4a9-150d-493e-8cdd-9832356592dc/svn/hdx-air-filters-hdx1p7-011820-64_600.jpg)
HDX 18 in. x 20 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 11 HDX1P7-011820 - The Home Depot
![Filtrete 18-in W x 20-in L x 1-in MERV 2 Basic Flat Panel Basic Flat Air Filter (2-Pack) in the Air Filters department at Lowes.com Filtrete 18-in W x 20-in L x 1-in MERV 2 Basic Flat Panel Basic Flat Air Filter (2-Pack) in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/ce101388-dd29-490b-b96f-96d333d81113/05221642.jpg)
Filtrete 18-in W x 20-in L x 1-in MERV 2 Basic Flat Panel Basic Flat Air Filter (2-Pack) in the Air Filters department at Lowes.com
![Filtrete 18-in W x 20-in L x 1-in MERV 5 Basic Pleated Air Filter in the Air Filters department at Lowes.com Filtrete 18-in W x 20-in L x 1-in MERV 5 Basic Pleated Air Filter in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/dafc094e-553c-4b46-b0d7-5901bf567790/65752996.jpg?size=pdhism)
Filtrete 18-in W x 20-in L x 1-in MERV 5 Basic Pleated Air Filter in the Air Filters department at Lowes.com
![Koch Air Filter 18 x 20 x 1 MERV 8 Pleated Air Filter 12 Pack - Hepa Filter Sales - HepaFilterSales.com -- We Deliver Breathing Easier Koch Air Filter 18 x 20 x 1 MERV 8 Pleated Air Filter 12 Pack - Hepa Filter Sales - HepaFilterSales.com -- We Deliver Breathing Easier](https://hepafiltersales.com/cdn/shop/products/102-700-004-12Pack_af1ea4e5-7820-4bf0-b8e7-db8bbec9dd4c_1024x1024.jpg?v=1674082860)
Koch Air Filter 18 x 20 x 1 MERV 8 Pleated Air Filter 12 Pack - Hepa Filter Sales - HepaFilterSales.com -- We Deliver Breathing Easier
![Amazon.com: AIRx Filters Allergy MERV 11 AC Furnace Pleated Air Filter Replacement Box of 6, 18x20x1 Air Filter / 18x20x1 furnace filter Made in the USA : Home & Kitchen Amazon.com: AIRx Filters Allergy MERV 11 AC Furnace Pleated Air Filter Replacement Box of 6, 18x20x1 Air Filter / 18x20x1 furnace filter Made in the USA : Home & Kitchen](https://m.media-amazon.com/images/I/51JWjGCfj0L.jpg)
Amazon.com: AIRx Filters Allergy MERV 11 AC Furnace Pleated Air Filter Replacement Box of 6, 18x20x1 Air Filter / 18x20x1 furnace filter Made in the USA : Home & Kitchen
![HDX 18 in. x 20 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-011820 - The Home Depot HDX 18 in. x 20 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-011820 - The Home Depot](https://images.thdstatic.com/productImages/f7dac88c-2a95-4d81-bd05-c9b999043342/svn/hdx-air-filters-hdx3p5-011820-a0_600.jpg)