Description
Actual Dimensions: 19.75 x 20.75 x 4.88. Accumulair brand: 20x20x5 Ultravation 91-028 substitute whole house air filters, specifically constructed to replace original manufacturer Ultravation 91-028 filters. Fully box-formed with no assembly or combs needed. MERV rated to ASHRAE 52.2 test standards assuring function equal to the name brand Ultravation 91-028 air filter. Photo: Sample filter image shown is not to scale and is there to show style purposes only. Company names and Ultravation 91-028 identifier used for air filter replacement purposes.