Actual dimensions are 20 x 23.13 x .75. Accumulair brand: 21x23.5x1 American Standard TFP235A0AH10 substitute whole house filters, specifically designed to replace original manufacturer American Standard TFP235A0AH10 filters. Fully built with no assembly or combs needed. MERV graded to ASHRAE 52.2 test grades ensuring function equal to the original brand American Standard TFP235A0AH10 air filters. Notice: Example air filter image displayed is not true to size and is displayed for style only. Company names and American Standard TFP235A0AH10 part numbers are used for filter substitution identification use.
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