Actual dimensions are 12.13 x 19.88 x 4.25. Accumulair brand 12x20x4.25 Day and Night FILBBFNC0014 compatible whole house air filters, exactly designed to substitute for the original brand Day and Night FILBBFNC0014 air filters. Fully assembled with no forming or combs needed. MERV classified to ASHRAE 52.2 test grades establishing performance to the level of the name brand Day and Night FILBBFNC0014 air filter. Notice: Sample air filter pic as displayed is not the actual dimensions and is included to show construction purposes. Brand names and Day and Night FILBBFNC0014 part numbers are included for air filter replacement identification purposes.
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