Actual size is 20.75 x 20.25 x 5.25. Accumulair brand 20x20x5 Philco BB2020 replacement whole house air filters, specifically built to replace OEM Philco BB2020 air filters. Fully built - no assembly or combs needed. MERV graded to ASHRAE grades establishing operation equal to the OEM Philco BB2020 air filters. Notice: The sample air filter pic as displayed is not true to size and is included to show design only. Company names and Philco BB2020 part numbers included for air filter style purposes.
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