Filtrete 20 in. W X 20 in. H X 1 in. D Polypropylene 13 MERV Pleated Allergen
Filtrete 20 in. W X 20 in. Product Type: Allergen Air Filter. Outperforms fiberglass, washable and non-electrostatic 3-month pleated 1 in. Pleated: Yes. Filter Material: Polypropylene. A dirty filter will slow down air flow and make the system work harder to keep you warm or cool–wasting energy.