Actual Dimensions: 20.63 x 26.25 x .75. Accumulair brand 21x27x1 American Standard BAYFTFR21W1A substitute whole house air filters, exactly built to substitute for the name brand American Standard BAYFTFR21W1A air filters. Fully assembled - no assembly or combs required. MERV rated to ASHRAE standards establishing particle filtration as good or better than the original manufacturer American Standard BAYFTFR21W1A filter. Photo: The example filter picture displayed is not true to size and is there to show design purposes. Trade names and American Standard BAYFTFR21W1A identifier are listed for air filter style identification only.
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