2 PACK Filtrete 18x24x1 AC Furnace Air Filter, MERV 13 MPR 1900 Premium Allergen
Compatible Devices Air Conditioner, Furnace. OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. A dirty filter will slow down air flow and make the system work harder to keep you warm or cool–wasting energy.