Description
Actual size is 20.75 x 20.75 x 4.38. Accumulair brand, 21x21x4.5 Rheem RXHF-E21AM13 substitute whole house air filters, specifically built to substitute for the OEM Rheem RXHF-E21AM13 air filters. Completely built so no forming or combs needed. MERV rated to ASHRAE 52.2 test standards ensuring function equal to the name brand Rheem RXHF-E21AM13 air filter. Notice: Sample air filter picture as shown is not true to size and is displayed for construction purposes only. Brand names and Rheem RXHF-E21AM13 P/N included for air filter replacement identification.