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HDX 18 in. x 18 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-011818 - The Home Depot
![PRO-SOURCE - Pleated Air Filter: 18 x 18 x 1″, MERV 10, 55% Efficiency, Wire-Backed Pleated - 00027441 - MSC Industrial Supply PRO-SOURCE - Pleated Air Filter: 18 x 18 x 1″, MERV 10, 55% Efficiency, Wire-Backed Pleated - 00027441 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/0002744AC-24.jpg)
PRO-SOURCE - Pleated Air Filter: 18 x 18 x 1″, MERV 10, 55% Efficiency, Wire-Backed Pleated - 00027441 - MSC Industrial Supply
![Filtrete 18-in W x 18-in L x 1-in 5 MERV Basic Pleated Air Filter (3-Pack) in the Air Filters department at Lowes.com Filtrete 18-in W x 18-in L x 1-in 5 MERV Basic Pleated Air Filter (3-Pack) in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/46ccbf7d-883f-4fba-9e3f-a87096fc3426/05222081.jpg)
Filtrete 18-in W x 18-in L x 1-in 5 MERV Basic Pleated Air Filter (3-Pack) in the Air Filters department at Lowes.com
![HDX 18 in. x 18 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-011818 - The Home Depot HDX 18 in. x 18 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-011818 - The Home Depot](https://images.thdstatic.com/productImages/697cfe3a-223b-44f5-91e9-e56e1c5b59c2/svn/hdx-air-filters-hdx3p5-011818-1d_600.jpg)
HDX 18 in. x 18 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-011818 - The Home Depot
![PRO-SOURCE - Pleated Air Filter: 18 x 18 x 2″, MERV 8, 30 to 35% Efficiency, Wire-Backed Pleated - 15166309 - MSC Industrial Supply PRO-SOURCE - Pleated Air Filter: 18 x 18 x 2″, MERV 8, 30 to 35% Efficiency, Wire-Backed Pleated - 15166309 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/0622225-21.jpg)
PRO-SOURCE - Pleated Air Filter: 18 x 18 x 2″, MERV 8, 30 to 35% Efficiency, Wire-Backed Pleated - 15166309 - MSC Industrial Supply
![18" X 18 Steel Return Air Filter Grille for 1" Filter - Removable Face/Door - HVAC DUCT COVER - Flat Stamped Face - White [Outer Dimensions: 20.5"w X 20.5"h] - Walmart.com 18" X 18 Steel Return Air Filter Grille for 1" Filter - Removable Face/Door - HVAC DUCT COVER - Flat Stamped Face - White [Outer Dimensions: 20.5"w X 20.5"h] - Walmart.com](https://i5.walmartimages.com/seo/18-X-18-Steel-Return-Air-Filter-Grille-1-Removable-Face-Door-HVAC-DUCT-COVER-Flat-Stamped-Face-White-Outer-Dimensions-20-5-w-20-5-h_47b3e943-ff46-474a-85f5-f2dff832d1c8.5c9e5f6e676f79fbb297c0e6cd1abea4.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
18" X 18 Steel Return Air Filter Grille for 1" Filter - Removable Face/Door - HVAC DUCT COVER - Flat Stamped Face - White [Outer Dimensions: 20.5"w X 20.5"h] - Walmart.com
![18" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - Ceiling Recommended - HVAC Duct Cover - Flat" Stamped Face - White [Outer Dimensions: 20.5 X 19.75] - Amazon.com 18" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - Ceiling Recommended - HVAC Duct Cover - Flat" Stamped Face - White [Outer Dimensions: 20.5 X 19.75] - Amazon.com](https://m.media-amazon.com/images/I/81SV4o8jgML.jpg)
18" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - Ceiling Recommended - HVAC Duct Cover - Flat" Stamped Face - White [Outer Dimensions: 20.5 X 19.75] - Amazon.com
![Amazon.com: Handua 18"W x 18"H [Duct Opening Size] Filter Included Steel Return Air Filter Grille [Removable Door] for 1" Filters, Vent Cover Grill, White, Outer Dimensions: 20 5/8"W X 20 5/8"H for Amazon.com: Handua 18"W x 18"H [Duct Opening Size] Filter Included Steel Return Air Filter Grille [Removable Door] for 1" Filters, Vent Cover Grill, White, Outer Dimensions: 20 5/8"W X 20 5/8"H for](https://m.media-amazon.com/images/I/8138fmzouxL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Handua 18"W x 18"H [Duct Opening Size] Filter Included Steel Return Air Filter Grille [Removable Door] for 1" Filters, Vent Cover Grill, White, Outer Dimensions: 20 5/8"W X 20 5/8"H for
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Venti Air 18 in. x 18 in. Square Return Air Filter Grille of Steel in White HFG1818 - The Home Depot
![Filtrete 18-in W x 18-in L x 1-in 11 MERV 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter (2-Pack) in the Air Filters department at Lowes.com Filtrete 18-in W x 18-in L x 1-in 11 MERV 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter (2-Pack) in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/f27a7a39-b5f3-4fde-a023-4270795af718/63647208.jpg)
Filtrete 18-in W x 18-in L x 1-in 11 MERV 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter (2-Pack) in the Air Filters department at Lowes.com
![18" X 18" Return Air Filter Grille - Filter Included - Easy Plastic Tabs for Removable Face/Door - HVAC VENT DUCT COVER - White [Outer Dimensions: 19.75w X 19.75h] - 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: 19.75w X 19.75h] - 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: 19.75w X 19.75h] - Amazon.com
![Air-Care 18-in W x 18-in L x 1-in Washable 8 MERV Electrostatic Air Filter in the Air Filters department at Lowes.com Air-Care 18-in W x 18-in L x 1-in Washable 8 MERV Electrostatic Air Filter in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/32a8ced0-42d1-41c2-b91d-418483ed11df/49427986.jpg)