![HDX 18 in. x 20 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011820 - The Home Depot HDX 18 in. x 20 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011820 - The Home Depot](https://images.thdstatic.com/productImages/6fffffed-d655-447c-b04f-93b1e45570d6/svn/hdx-air-filters-hdx1p9-011820-64_600.jpg)
HDX 18 in. x 20 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011820 - The Home Depot
![Ppa Industries 118201 EZ Flow II Fiberglass 30 Day Low Resistance Air Filter 18 x 20 x 1 Inch: 18 by 20 Inch Filters (641590001222-2) Ppa Industries 118201 EZ Flow II Fiberglass 30 Day Low Resistance Air Filter 18 x 20 x 1 Inch: 18 by 20 Inch Filters (641590001222-2)](https://images.cdn.hardwareandtools.net/original/031949150365.webp?v=VHBVdjlsZ1lTV1lnNlFCdlp1SkFZWndIWndKTXB3bWM4MG41YXZGNDRLMD0~)
Ppa Industries 118201 EZ Flow II Fiberglass 30 Day Low Resistance Air Filter 18 x 20 x 1 Inch: 18 by 20 Inch Filters (641590001222-2)
![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
![HDX 18 in. x 20 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011820 - The Home Depot HDX 18 in. x 20 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011820 - The Home Depot](https://images.thdstatic.com/productImages/bd684771-79ab-47a1-9f3d-fe85341500c3/svn/hdx-air-filters-hdx1p9-011820-e1_600.jpg)
HDX 18 in. x 20 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011820 - The Home Depot
![Made in USA - Pleated Air Filter: 18 x 24 x 1″, MERV 8, 30 to 35% Efficiency, Wire-Backed Pleated - 79748067 - MSC Industrial Supply Made in USA - Pleated Air Filter: 18 x 24 x 1″, MERV 8, 30 to 35% Efficiency, Wire-Backed Pleated - 79748067 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/7974799-11.jpg)
Made in USA - Pleated Air Filter: 18 x 24 x 1″, MERV 8, 30 to 35% Efficiency, Wire-Backed Pleated - 79748067 - MSC Industrial Supply
![American Air Filters 220-627-051 American Air Filter StrataDensity Panel Filter 18-Inch x 20-Inch x 1-Inch American Air Filters 220-627-051 American Air Filter StrataDensity Panel Filter 18-Inch x 20-Inch x 1-Inch](https://www.acwholesalers.com/products-image/600/mass_95913_1000.jpg)
American Air Filters 220-627-051 American Air Filter StrataDensity Panel Filter 18-Inch x 20-Inch x 1-Inch
![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/604d38ee-e027-435a-8ac7-631960524c3f/svn/hdx-air-filters-hdx3p5-011820-e1_600.jpg)
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
![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_600x.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
![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/c3f25261-148c-463c-b0bf-af1c6caf66dc/svn/hdx-air-filters-hdx3p5-011820-64_600.jpg)
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 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)
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
![Global Industrial™ Pleated Air Filter, 18 X 20 X 1", MERV 8, Standard Capacity, Self-Supported - Pkg Qty 12 Global Industrial™ Pleated Air Filter, 18 X 20 X 1", MERV 8, Standard Capacity, Self-Supported - Pkg Qty 12](https://images.globalindustrial.com/images/pdp/FGC_GI521718201.webp?t=1690204984197)
Global Industrial™ Pleated Air Filter, 18 X 20 X 1", MERV 8, Standard Capacity, Self-Supported - Pkg Qty 12
![Filtrete 18-in W x 24-in L x 1-in MERV 5 Basic Pleated Air Filter (3-Pack) in the Air Filters department at Lowes.com Filtrete 18-in W x 24-in L x 1-in MERV 5 Basic Pleated Air Filter (3-Pack) in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/a62d6b2d-57e2-4898-a0b7-a549deeb1d36/65752998.jpg?size=pdhism)