Description
Actual Size: 20.75 x 20.75 x 4.38. Accumulair brand, 21x21x4.5 Rheem PD540012 substitute whole house filters, exactly built to be an alternative to the name brand Rheem PD540012 air filters. Fully constructed with no assembly or combs required. MERV rated to ASHRAE 52.2 test specifications assuring particle filtration equal to the OEM Rheem PD540012 air filter. Notice: The example air filter pic displayed is not true to size and is displayed for style only. Trade names and Rheem PD540012 P/N displayed for filter style purposes.