Actual Size: 19.13 x 19.88 x 4.25. Accumulair brand 19x20x4.25 BDP FILBBFNC0021 compatible whole house filters, exactly constructed to be an alternative to the original brand BDP FILBBFNC0021 air filters. Fully constructed - no assembly or combs required. MERV rated to ASHRAE 52.2 test standards assuring particulate capture equal to the OEM BDP FILBBFNC0021 air filters. Notice: The sample air filter pic shown is not to scale and is displayed for style only. Trade names and BDP FILBBFNC0021 P/N used for filter substitution identification purposes.
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