3M Filtrete 18 In. x 20 In. x 1 In. 1000 MPR Allergen Defense Furnace Filter

Opt for a Filtrete Allergen DefenseAir Filter to transform your central heating and cooling system into a whole-home air filtration operation. This no-nonsense filter helps capture varying sizes of particles, from the large (lint, pollen, dust and pet dander) to the microscopic (smoke and smog).