Actual Dimensions: 20.75 x 20.63 x 5. Accumulair brand 20x21x5 Electro-Air F8110321 style whole house air filters, exactly engineered to be an alternative to the original manufacturer Electro-Air F8110321 filters. Completely constructed so no assembly or combs required. MERV graded to ASHRAE specifications ensuring operation equal to the OEM Electro-Air F8110321 air filter. Notice: The example air filter picture displayed is not the actual dimensions and is displayed for configuration purposes only. Name brands and Electro-Air F8110321 P/N included for filter substitution identification purposes.
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