Description
Actual Dimensions: 19.5 x 19.5 x 3.75. Accumulair brand, 20x20x4 20x20x4 Top Tech compatible whole house air filters, specifically built to substitute for the OEM 20x20x4 Top Tech air filters. Completely box-formed - no assembly or combs needed. MERV classified to ASHRAE classifications ensuring performance as good or better than the name brand 20x20x4 Top Tech filters. Photo: The example air filter image shown is not true to size and is shown for configuration purposes. Brand names and 20x20x4 Top Tech identifier are used for filter style identification use.