Filtrete 20 in. W X 20 in. H X 1 in. D 12 MERV Pleated Allergen Air Filter 4pk
Filtrete 20 in. W X 20 in. 15% better airflow than Red Filtrete. Product Type: Allergen Air Filter. Pleated: Yes. A dirty filter will slow down air flow and make the system work harder to keep you warm or cool–wasting energy.