![18" X 18" Return Air Filter Grille - Filter Included - Easy Plastic Tabs for Removable Face/Door - HVAC VENT DUCT COVER - White [Outer Dimensions: 20 5/8"w X 20 5/8"h] - Amazon.com 18" X 18" Return Air Filter Grille - Filter Included - Easy Plastic Tabs for Removable Face/Door - HVAC VENT DUCT COVER - White [Outer Dimensions: 20 5/8"w X 20 5/8"h] - Amazon.com](https://m.media-amazon.com/images/I/716WoxjtcAL._AC_UF894,1000_QL80_.jpg)
18" X 18" Return Air Filter Grille - Filter Included - Easy Plastic Tabs for Removable Face/Door - HVAC VENT DUCT COVER - White [Outer Dimensions: 20 5/8"w X 20 5/8"h] - Amazon.com
![HDX 22 in. x 22 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-012222 - The Home Depot HDX 22 in. x 22 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-012222 - The Home Depot](https://images.thdstatic.com/productImages/cdf2e3bd-7d53-49b6-924c-d3ce96e53911/svn/hdx-air-filters-hdx1p9-012222-66_600.jpg)
HDX 22 in. x 22 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-012222 - The Home Depot
![18 x 22 x 1 Permanent Washable Electrostatic HVAC Furnace Air Filter, MERV 8, Allergen & Dust Reduction - Walmart.com 18 x 22 x 1 Permanent Washable Electrostatic HVAC Furnace Air Filter, MERV 8, Allergen & Dust Reduction - Walmart.com](https://i5.walmartimages.com/seo/18-x-22-x-1-Permanent-Washable-Electrostatic-HVAC-Furnace-Air-Filter-MERV-8-Allergen-Dust-Reduction_02ad2bea-3d2c-4a3a-ab71-53cadcd92cc3.6b4d19add19f0ac5b9a3c68a1c28fa33.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
18 x 22 x 1 Permanent Washable Electrostatic HVAC Furnace Air Filter, MERV 8, Allergen & Dust Reduction - Walmart.com
![PRO-SOURCE - Pleated Air Filter: 18 x 22 x 2″, MERV 8, 35% Efficiency, Wire-Backed Pleated - 00027722 - MSC Industrial Supply PRO-SOURCE - Pleated Air Filter: 18 x 22 x 2″, MERV 8, 35% Efficiency, Wire-Backed Pleated - 00027722 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/0622225-21.jpg)