Description
Actual dimensions are 19.75 x 24.25 x 4.75. Accumulair brand: 20x25x5 Armstrong ABS20A-1 style whole house air filters, exactly engineered to be an alternative to the original manufacturer Armstrong ABS20A-1 filters. Fully constructed with no forming or combs required. MERV graded to ASHRAE specs establishing operation equal to the OEM Armstrong ABS20A-1 filter. Note: Example air filter image as shown is not true to size and is included to show construction only. Brand names and Armstrong ABS20A-1 part numbers are included for filter substitution purposes.