Actual Dimensions: 20.75 x 20.63 x 5. Accumulair brand 20x21x5 Emerson F825-0337 replacement whole house air filters, specifically built to replace the original brand Emerson F825-0337 filters. Completely box-formed with no assembly or combs needed. MERV graded to ASHRAE ratings ensuring particulate capture as good or better than the name brand Emerson F825-0337 air filters. Notice: Sample air filter picture shown is not to scale and is shown for configuration purposes only. Brand names and Emerson F825-0337 identifier are used for filter style identification purposes.
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