Pleated 18x20x1 Filterbuy Furnace Air 13 Filters (12-Pack) AC MERV HVAC

18x20x1 air filters for your furnace, air conditioner, heat pump, or HVAC system Actual size (exact dimensions): 17.5 x 19.5 x 0.75 inches (12-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