Description
Actual Dimensions: 20.75 x 24.25 x 4.38. Accumulair brand, 21x24x4.5 Rheem Protech 540020 style whole house air filters, exactly built to substitute for the original brand Rheem Protech 540020 filters. Completely constructed with no forming or combs required. MERV classified to ASHRAE 52.2 test specifications establishing particulate filtration as good or better than the original manufacturer Rheem Protech 540020 filters. Notice: The example air filter pic as shown is not the actual dimensions and is displayed for style only. OEM names and Rheem Protech 540020 P/N are listed for filter substitution purposes only.