Actual size is 19.75 x 19.88 x 4.38. Accumulair brand: 20x20x5 Lennox X8308 style whole house filters, exactly designed to replace OEM Lennox X8308 filters. Completely assembled with no assembly or combs required. MERV graded to ASHRAE classifications establishing operation as good or better than the name brand Lennox X8308 air filters. Note: The sample filter pic shown is not the actual dimensions and is included to show style purposes. Name brands and Lennox X8308 part numbers included for filter replacement purposes only.
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