Actual dimensions are 20.25 x 25.38 x 5.25. Accumulair brand 20x25x5 Westinghouse MU2025 substitute whole house air filters, specifically constructed to replace original brand Westinghouse MU2025 filters. Completely box-formed with no assembly or combs needed. MERV rated to ASHRAE classifications ensuring performance to the level of the original manufacturer Westinghouse MU2025 filters. Note: Sample air filter picture displayed is not true to size and is included to show configuration only. Brand names and Westinghouse MU2025 P/N are listed for filter substitution identification only.
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