Actual size is 20 x 21.13 x .75. Accumulair brand, 21x21.5x1 American Standard BAYFTFR21W1A replacement whole house air filters, specifically built to be an alternative to the original brand American Standard BAYFTFR21W1A air filters. Completely box-formed with no assembly or combs required. MERV graded to ASHRAE specifications establishing particle capture equal to the original brand American Standard BAYFTFR21W1A filters. Notice: Example air filter image as displayed is not the actual dimensions and is there to show construction purposes only. Company names and American Standard BAYFTFR21W1A P/N are included for filter substitution purposes.
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