![Amazon.com: Filterbuy 20x20x1 Air Filter MERV 13 Optimal Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 19.50 x 0.75 Inches) : Tools & Home Improvement Amazon.com: Filterbuy 20x20x1 Air Filter MERV 13 Optimal Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 19.50 x 0.75 Inches) : Tools & Home Improvement](https://m.media-amazon.com/images/I/71ycN-PQ-UL.jpg)
Amazon.com: Filterbuy 20x20x1 Air Filter MERV 13 Optimal Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 19.50 x 0.75 Inches) : Tools & Home Improvement
![Filterbuy 20x20x1 Air Filter MERV 11 Allergen Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 19.50 x 0.75 Inches) - Replacement Furnace Filters - Amazon.com Filterbuy 20x20x1 Air Filter MERV 11 Allergen Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 19.50 x 0.75 Inches) - Replacement Furnace Filters - Amazon.com](https://m.media-amazon.com/images/I/81vd4i9QjWL.jpg)
Filterbuy 20x20x1 Air Filter MERV 11 Allergen Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 19.50 x 0.75 Inches) - Replacement Furnace Filters - Amazon.com
![Filtrete 18-in W x 20-in L x 1-in 11 MERV 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 11 MERV 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 11 MERV 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com
![Value Collection - Panel Air Filter: 20 x 20 x 1″, MERV 4, 20% Efficiency - 57023293 - MSC Industrial Supply Value Collection - Panel Air Filter: 20 x 20 x 1″, MERV 4, 20% Efficiency - 57023293 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/9845868-21.jpg)
Value Collection - Panel Air Filter: 20 x 20 x 1″, MERV 4, 20% Efficiency - 57023293 - MSC Industrial Supply
![Filtrete 20x20x1 Air Filter, MPR 2800, MERV 14, Healthy Living Ultrafine Particle Reduction 3-Month Pleated 1-Inch Air Filters, 2 Filters - Amazon.com Filtrete 20x20x1 Air Filter, MPR 2800, MERV 14, Healthy Living Ultrafine Particle Reduction 3-Month Pleated 1-Inch Air Filters, 2 Filters - Amazon.com](https://m.media-amazon.com/images/I/81-zNW0BObL.jpg)
Filtrete 20x20x1 Air Filter, MPR 2800, MERV 14, Healthy Living Ultrafine Particle Reduction 3-Month Pleated 1-Inch Air Filters, 2 Filters - Amazon.com
![Filtrete 20-in W x 20-in L x 1-in 2 MERV Basic Flat Panel Basic Flat Air Filter (2-Pack) in the Air Filters department at Lowes.com Filtrete 20-in W x 20-in L x 1-in 2 MERV Basic Flat Panel Basic Flat Air Filter (2-Pack) in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/ca4a734c-b1f7-4815-b813-91a6866d2224/01462130.jpg)
Filtrete 20-in W x 20-in L x 1-in 2 MERV Basic Flat Panel Basic Flat Air Filter (2-Pack) in the Air Filters department at Lowes.com
![K&N 20-in W x 20-in L x 1-in Washable 11 MERV Pleated Air Filter in the Air Filters department at Lowes.com K&N 20-in W x 20-in L x 1-in Washable 11 MERV Pleated Air Filter in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/0d8488a5-02e0-4f1a-8b70-eccd9d02899d/44120184.jpg)
K&N 20-in W x 20-in L x 1-in Washable 11 MERV Pleated Air Filter in the Air Filters department at Lowes.com
![Filtrete 20-in W x 20-in L x 1-in 5 MERV Basic Pleated Air Filter (3-Pack) in the Air Filters department at Lowes.com Filtrete 20-in W x 20-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/f3b7e70d-5314-48eb-9bca-959885e2bdd8/01406065.jpg)
Filtrete 20-in W x 20-in L x 1-in 5 MERV Basic Pleated Air Filter (3-Pack) in the Air Filters department at Lowes.com
![Filtrete 20x20x1, MERV 13, Elite Allergen Reduction HVAC Furnace Air Filter, MPR 2200, 1 Filter - Walmart.com Filtrete 20x20x1, MERV 13, Elite Allergen Reduction HVAC Furnace Air Filter, MPR 2200, 1 Filter - Walmart.com](https://i5.walmartimages.com/seo/Filtrete-20x20x1-MERV-13-Elite-Allergen-Reduction-HVAC-Furnace-Air-Filter-MPR-2200-1-Filter_6b58aed8-ad71-45e7-a3bf-32e9665deddb.32d071385d0b25bcb7f2e01d5cc9c450.jpeg)
Filtrete 20x20x1, MERV 13, Elite Allergen Reduction HVAC Furnace Air Filter, MPR 2200, 1 Filter - Walmart.com
![Honeywell 16 x 20 x 1 Elite Allergen Pleated MERV 13 - FPR 10 Air Filter 91001.011620 - The Home Depot Honeywell 16 x 20 x 1 Elite Allergen Pleated MERV 13 - FPR 10 Air Filter 91001.011620 - The Home Depot](https://images.thdstatic.com/productImages/236bda2a-dc4b-4045-ae5e-a8688ab3ed38/svn/honeywell-air-filters-91001-011620-64_1000.jpg)
Honeywell 16 x 20 x 1 Elite Allergen Pleated MERV 13 - FPR 10 Air Filter 91001.011620 - The Home Depot
![Filtrete 20x20x1 Air Filter, MPR 300, MERV 5, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters - Amazon.com Filtrete 20x20x1 Air Filter, MPR 300, MERV 5, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters - Amazon.com](https://m.media-amazon.com/images/I/81W0GuDFUDL.jpg)
Filtrete 20x20x1 Air Filter, MPR 300, MERV 5, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters - Amazon.com
![LotFancy 20x20x1 Air Filters, 4 Pack MERV 8 Pleated AC Furnace Filters, MPR 600 Air Conditioner HVAC Filter - Amazon.com LotFancy 20x20x1 Air Filters, 4 Pack MERV 8 Pleated AC Furnace Filters, MPR 600 Air Conditioner HVAC Filter - Amazon.com](https://m.media-amazon.com/images/I/81C9JpMgeFL.jpg)
LotFancy 20x20x1 Air Filters, 4 Pack MERV 8 Pleated AC Furnace Filters, MPR 600 Air Conditioner HVAC Filter - Amazon.com
![HDX 16 in. x 20 in. x 1 in. Standard Pleated Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-011620 - The Home Depot HDX 16 in. x 20 in. x 1 in. Standard Pleated Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-011620 - The Home Depot](https://images.thdstatic.com/productImages/9aec4290-da5e-40b9-8bf4-604341ca1ed9/svn/hdx-air-filters-hdx3p5-011620-64_1000.jpg)