Description
Actual Size: 19.75 x 24.25 x 4.75. Accumulair brand: 20x25x5 Armstrong AMC20A-1 compatible whole house air filters, exactly engineered to replace the OEM Armstrong AMC20A-1 filters. Completely box-formed with no forming or combs needed. MERV classified to ASHRAE 52.2 test specs ensuring particle capture to the level of the name brand Armstrong AMC20A-1 filters. Photo: Sample air filter picture shown is not the actual dimensions and is shown for construction purposes. Trade names and Armstrong AMC20A-1 identifier used for air filter replacement identification use.