Description
Actual Size: 19.75 x 20.75 x 4.88. Accumulair brand: 20x20x5 Ultravation 91-028 style whole house air filters, exactly engineered to replace OEM Ultravation 91-028 filters. Fully box-formed so no forming or combs needed. MERV classified to ASHRAE 52.2 test standards assuring operation to the level of the original brand Ultravation 91-028 filter. Photo: Sample air filter pic shown is not true to size and is shown for style purposes. Company names and Ultravation 91-028 part numbers shown for filter substitution purposes.