Description
Actual Size: 19.13 x 19.88 x 4.25. Accumulair brand, 19x20x4.25 BDP FILBBFNC0021 substitute whole house air filters, specifically engineered to replace OEM BDP FILBBFNC0021 filters. Completely constructed with no assembly or combs required. MERV rated to ASHRAE specs assuring particulate filtration equal to the original brand BDP FILBBFNC0021 filter. Note: The example filter image shown is not to scale and is displayed for construction purposes. Company names and BDP FILBBFNC0021 part numbers are shown for filter substitution purposes.