Actual size is 20.75 x 20.25 x 5.25. Accumulair brand: 20x20x5 Five Seasons FSMU2020 compatible whole house filters, specifically built to replace the OEM Five Seasons FSMU2020 filters. Completely assembled with no assembly or combs required. MERV graded to ASHRAE ratings ensuring particle filtration equal to the OEM Five Seasons FSMU2020 filter. Photo: Sample air filter pic as displayed is not true to size and is shown for design only. Name brands and Five Seasons FSMU2020 P/N are used for air filter substitution identification purposes only.
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