Filterbuy 20x21x5 MERV 11 Pleated HVAC AC Furnace Air Filters for Lennox X8790 / PCO14-23 (4-Pack)

20x21x5 air filters for your furnace, air conditioner, heat pump, or HVAC system Actual size (exact dimensions): 19.88 x 20.5 x 4.38 inches (4-Pack) MERV 11 electrostatic media (MPR 1200, FPR 7) protects against 95% of particles Pleated design traps more airborne particles and lasts 3x longer than fiberglass All industrial-grade components are made in the USA and designed to be recycled Compatible Models: Lennox Filter Part Number (X8790), Housing Part Number (PCO14-23)