Description
Actual dimensions are 20.75 x 24.25 x 4.38. Accumulair brand 21x24x4.5 Rheem PD540014 compatible whole house air filters, exactly built to replace the original brand Rheem PD540014 air filters. Completely constructed - no forming or combs needed. MERV graded to ASHRAE 52.2 test specs establishing function as good or better than the name brand Rheem PD540014 air filter. Photo: The sample filter picture shown is not the actual dimensions and is shown for construction purposes only. Brand names and Rheem PD540014 P/N are listed for filter replacement identification only.