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 (1-pack) merv 13 electrostatic media (mpr 1900, fpr 10) protects against 98% 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)
