Actual Dimensions: 19.5 x 24.5 x 3.75. Accumulair brand 20x25x4 20x25x4 Top Tech compatible whole house air filters, specifically constructed to replace the OEM 20x25x4 Top Tech filters. Fully box-formed with no forming or combs required. MERV rated to ASHRAE specs establishing operation equal to the name brand 20x25x4 Top Tech filters. Notice: Example air filter pic as shown is not true to size and is displayed for style only. Name brands and 20x25x4 Top Tech identifier used for air filter replacement identification.
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