![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/2bb57a0d-65e0-4681-84b7-729418b91470/svn/hdx-air-filters-hdx3p5-011818-64_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
![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
![PRO-SOURCE - Pleated Air Filter: 18 x 25 x 1″, MERV 10, 55% Efficiency, Wire-Backed Pleated - 00027573 - MSC Industrial Supply PRO-SOURCE - Pleated Air Filter: 18 x 25 x 1″, MERV 10, 55% Efficiency, Wire-Backed Pleated - 00027573 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/0002757AC-24.jpg)
PRO-SOURCE - Pleated Air Filter: 18 x 25 x 1″, MERV 10, 55% Efficiency, Wire-Backed Pleated - 00027573 - MSC Industrial Supply
![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
![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
![Venti Air 18 in. x 18 in. Square Return Air Filter Grille of Steel in White HFG1818 - The Home Depot Venti Air 18 in. x 18 in. Square Return Air Filter Grille of Steel in White HFG1818 - The Home Depot](https://images.thdstatic.com/productImages/0509850a-c12c-414d-a2ae-4fec0fef7e15/svn/whites-venti-air-registers-grilles-hfg1818-44_600.jpg)
Venti Air 18 in. x 18 in. Square Return Air Filter Grille of Steel in White HFG1818 - The Home Depot
![Venti Air 18 in. x 18 in. Square Return Air Filter Grille of Steel in White HFG1818 - The Home Depot Venti Air 18 in. x 18 in. Square Return Air Filter Grille of Steel in White HFG1818 - The Home Depot](https://images.thdstatic.com/productImages/8a48db85-5be4-4f90-a621-0d811de425fa/svn/whites-venti-air-registers-grilles-hfg1818-64_600.jpg)
Venti Air 18 in. x 18 in. Square Return Air Filter Grille of Steel in White HFG1818 - The Home Depot
![HDX 18 in. x 18 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011818 - The Home Depot HDX 18 in. x 18 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011818 - The Home Depot](https://images.thdstatic.com/productImages/1cb000eb-6a88-4713-a87a-915a1f0e9100/svn/hdx-air-filters-hdx1p9-011818-64_600.jpg)
HDX 18 in. x 18 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011818 - The Home Depot
![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)
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
![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/f7dac88c-2a95-4d81-bd05-c9b999043342/svn/hdx-air-filters-hdx3p5-011818-a0_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
![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
![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
![Filtrete 16-in W x 18-in L x 1-in 5 MERV Basic Pleated Air Filter in the Air Filters department at Lowes.com Filtrete 16-in W x 18-in L x 1-in 5 MERV Basic Pleated Air Filter in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/6d79da4e-46ba-4bb3-96ee-644c7bb52370/03268597.jpg)
Filtrete 16-in W x 18-in L x 1-in 5 MERV Basic Pleated Air Filter in the Air Filters department at Lowes.com
![Ez Flow Part # 10155.011818 - Ez Flow 18 In. X 18 In. X 1 In. Ez Flow Ii No-Metal Fiberglass Air Filter Merv 2 (12-Pack) - Fiberglass Air Filters - Home Depot Pro Ez Flow Part # 10155.011818 - Ez Flow 18 In. X 18 In. X 1 In. Ez Flow Ii No-Metal Fiberglass Air Filter Merv 2 (12-Pack) - Fiberglass Air Filters - Home Depot Pro](https://content.interlinebrands.com/product/Image/Detail/10096/2488628_usn.jpg)
Ez Flow Part # 10155.011818 - Ez Flow 18 In. X 18 In. X 1 In. Ez Flow Ii No-Metal Fiberglass Air Filter Merv 2 (12-Pack) - Fiberglass Air Filters - Home Depot Pro
![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)