![Filtrete 18-in W x 20-in L x 1-in 5 MERV Basic Pleated Air Filter in the Air Filters department at Lowes.com Filtrete 18-in W x 20-in L x 1-in 5 MERV Basic Pleated Air Filter in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/8627e49a-f339-41e8-a1d3-39ce290634fc/05234900.jpg)
Filtrete 18-in W x 20-in L x 1-in 5 MERV Basic Pleated Air Filter in the Air Filters department at Lowes.com
![Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4"x 19 3/4" x 3/4"): Amazon.com: Tools & Home Improvement Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4"x 19 3/4" x 3/4"): Amazon.com: Tools & Home Improvement](https://m.media-amazon.com/images/I/81cmAUnli1L.jpg)
Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4"x 19 3/4" x 3/4"): Amazon.com: Tools & Home Improvement
![Filtrete by 3M 18x20x1, MERV 12, Advanced Allergen Reduction HVAC Furnace Air Filter, 1500 MPR, 4 Filters - Walmart.com Filtrete by 3M 18x20x1, MERV 12, Advanced Allergen Reduction HVAC Furnace Air Filter, 1500 MPR, 4 Filters - Walmart.com](https://i5.walmartimages.com/seo/Filtrete-by-3M-18x20x1-MERV-12-Advanced-Allergen-Reduction-HVAC-Furnace-Air-Filter-1500-MPR-4-Filters_ddf262f6-2e8d-4da1-a8cb-c00900777153.94a92a3355995252948c58f32f2a6c9e.jpeg)
Filtrete by 3M 18x20x1, MERV 12, Advanced Allergen Reduction HVAC Furnace Air Filter, 1500 MPR, 4 Filters - Walmart.com
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BNX TruFilter 18x20x1 Air Filter MERV 11 (12-Pack)- MADE IN USA - Allergen Defense Electrostatic Pleated Air Conditioner HVAC AC Furnace Filters for Allergies, Dust, Pet, Smoke, Allergy MPR 1200 FPR 7 - Amazon.com
![Filtrete 18x20x1 Air Filter, MPR 1200 MERV 11, Allergen Defense, Captures Pet Dander, Smoke, Smog and Pollen, 1 Filter - Walmart.com Filtrete 18x20x1 Air Filter, MPR 1200 MERV 11, Allergen Defense, Captures Pet Dander, Smoke, Smog and Pollen, 1 Filter - Walmart.com](https://i5.walmartimages.com/seo/Filtrete-18x20x1-Air-Filter-MPR-1200-MERV-11-Allergen-Defense-Captures-Pet-Dander-Smoke-Smog-and-Pollen-1-Filter_8731b25e-5118-46d0-85a0-cfd8c981b667.d6bf4e3e16a7e1a520301b21e071c87e.jpeg)