Actual dimensions are 20 x 25.63 x .75. Accumulair brand 21x26x1 American Standard BAYFTAH26W1A replacement whole house air filters, specifically designed to replace the original manufacturer American Standard BAYFTAH26W1A filters. Fully box-formed so no assembly or combs needed. MERV classified to ASHRAE 52.2 test standards establishing particle filtration as good or better than the original brand American Standard BAYFTAH26W1A air filter. Note: Sample filter picture as shown is not true to size and is there to show design purposes only. OEM names and American Standard BAYFTAH26W1A part numbers are included for filter style purposes only.
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