Filterbuy 20x21x5 11 Pleated Furnace Air Filters for Lennox / -23 (4-Pack)

20x21x5 air filters for your furnace, air conditioner, heat pump, or system Actual size (exact dimensions): 19.88 x 20.5 x 4.38 inches (4-Pack) 11 electrostatic media ( 1200, 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 and designed to be recycled Compatible Models: Lennox Filter Part Number (), Housing Part Number (-23)