Description
Actual size is 20.1 x 21.1 x 5. Accumulair brand: 21x21.5x5 American Standard BAYFTAH21M substitute whole house filters, exactly engineered to replace the OEM American Standard BAYFTAH21M air filters. Fully built - no forming or combs needed. MERV classified to ASHRAE 52.2 test standards ensuring function as good or better than the original brand American Standard BAYFTAH21M filter. Photo: Example air filter pic as displayed is not to scale and is there to show construction only. Company names and American Standard BAYFTAH21M part numbers are used for air filter style identification use.