Actual dimensions are 20.25 x 25.38 x 5.25. Accumulair brand, 20x25x5 Nordyne 918397 replacement whole house filters, exactly engineered to be an alternative to the OEM Nordyne 918397 air filters. Completely constructed - no forming or combs required. MERV rated to ASHRAE 52.2 test standards establishing function to the level of the original manufacturer Nordyne 918397 filter. Notice: The sample filter picture as shown is not true to size and is included to show configuration purposes only. Trade names and Nordyne 918397 part numbers are used for air filter style purposes.
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