The Filtrete(TM) Allergen Defense filter attracts and captures microscopic allergens like dust, smoke, and smog particles and large allergens like mold spores and pollen. For residential use only.Opt for a Filtrete Allergen Defense Air 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).