Actual dimensions are 20.75 x 20.25 x 5.25. Accumulair brand 20x20x5 Five Seasons FSBB2020 compatible whole house filters, specifically built to replace original manufacturer Five Seasons FSBB2020 air filters. Fully box-formed so no assembly or combs needed. MERV graded to ASHRAE specifications ensuring function to the level of the OEM Five Seasons FSBB2020 filter. Note: The example filter picture as displayed is not to scale and is there to show construction only. OEM names and Five Seasons FSBB2020 part numbers are used for filter substitution purposes only.
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