Description
Actual size is 20.75 x 20.75 x 4.38. Accumulair brand, 21x21x4.5 Rheem PD540012 replacement whole house filters, exactly constructed to be an alternative to the name brand Rheem PD540012 air filters. Fully assembled - no forming or combs required. MERV classified to ASHRAE 52.2 test standards ensuring particulate capture to the level of the original manufacturer Rheem PD540012 air filters. Photo: The example air filter pic displayed is not the actual dimensions and is shown for configuration purposes. Name brands and Rheem PD540012 identifier are shown for air filter style purposes only.