Description
Actual size is 20.75 x 20.75 x 4.38. Brand: Accumulair. 21x21x4.5 Ruud RXHF-E21AM10 style whole house filters, specifically engineered to substitute for the OEM Ruud RXHF-E21AM10 filters. Completely constructed so no forming or combs required. MERV graded to ASHRAE specifications establishing performance to the level of the original manufacturer Ruud RXHF-E21AM10 air filters. Notice: The example filter picture shown is not the actual dimensions and is there to show style only. OEM names and Ruud RXHF-E21AM10 identifier are shown for air filter replacement identification purposes.