Description
Actual Size: 19.13 x 19.88 x 4.25. Accumulair brand: 19x20x4.25 BDP FILBBFNC0021 style whole house air filters, exactly constructed to replace the original manufacturer BDP FILBBFNC0021 filters. Fully box-formed - no forming or combs needed. MERV rated to ASHRAE 52.2 test specs ensuring filtration as good or better than the OEM BDP FILBBFNC0021 air filters. Note: Sample air filter pic as shown is not true to size and is shown for style only. Company names and BDP FILBBFNC0021 part numbers are included for filter substitution identification only.