Actual dimensions are 20.75 x 20.63 x 5. Accumulair brand: 20x21x5 Comfort Plus F825-0586 style whole house air filters, specifically engineered to be an alternative to the original brand Comfort Plus F825-0586 filters. Fully constructed so no forming or combs required. MERV classified to ASHRAE 52.2 test classifications ensuring particulate filtration as good or better than the OEM Comfort Plus F825-0586 filter. Note: The sample filter picture as shown is not to scale and is there to show design only. Name brands and Comfort Plus F825-0586 part numbers are included for air filter style identification purposes only.
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