Description
Actual Size: 19.75 x 20.75 x 4.88. Accumulair brand 20x20x5 Ultravation 91-028 style whole house filters, specifically engineered to substitute for the name brand Ultravation 91-028 filters. Completely box-formed - no forming or combs needed. MERV classified to ASHRAE 52.2 test ratings assuring operation as good or better than the OEM Ultravation 91-028 air filter. Notice: The sample filter pic as shown is not to scale and is included to show configuration purposes only. Trade names and Ultravation 91-028 P/N used for air filter substitution identification use.