Description
Actual dimensions are 20.75 x 20.75 x 4.38. Accumulair brand: 21x21x4.5 Ruud RXHF-E21AM10 replacement whole house filters, specifically engineered to substitute for the original manufacturer Ruud RXHF-E21AM10 air filters. Completely assembled - no assembly or combs needed. MERV graded to ASHRAE grades establishing particulate capture equal to the original manufacturer Ruud RXHF-E21AM10 air filter. Notice: Sample air filter image as displayed is not the actual dimensions and is there to show style purposes only. Trade names and Ruud RXHF-E21AM10 identifier are shown for air filter replacement purposes.