Actual Dimensions: 20.75 x 20.63 x 5. Accumulair brand, 20x21x5 Electro-Air F825-0337 style whole house air filters, exactly designed to replace the name brand Electro-Air F825-0337 filters. Fully assembled so no forming or combs required. MERV rated to ASHRAE grades establishing operation equal to the name brand Electro-Air F825-0337 air filter. Photo: The example filter pic as displayed is not to scale and is shown for design purposes only. OEM names and Electro-Air F825-0337 identifier used for air filter substitution purposes.
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