Actual dimensions are 20 x 21.13 x .75. Accumulair brand: 21x21.5x1 American Standard TFP210A0FR10 style whole house filters, exactly engineered to replace the original brand American Standard TFP210A0FR10 air filters. Fully box-formed with no forming or combs needed. MERV rated to ASHRAE classifications ensuring particulate filtration equal to the original manufacturer American Standard TFP210A0FR10 air filters. Notice: Example air filter image shown is not the actual dimensions and is shown for design only. Name brands and American Standard TFP210A0FR10 P/N are used for air filter substitution identification use.
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