Actual Dimensions: 20 x 25.63 x .75. Accumulair brand, 21x26x1 American Standard TFE260A9AH10 style whole house filters, exactly constructed to replace the original brand American Standard TFE260A9AH10 air filters. Fully box-formed with no forming or combs needed. MERV classified to ASHRAE 52.2 test specifications establishing function as good or better than the OEM American Standard TFE260A9AH10 filters. Notice: The sample filter picture as shown is not to scale and is there to show configuration purposes. OEM names and American Standard TFE260A9AH10 part numbers displayed for air filter style purposes only.
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