Description
Actual Size: 17.25 x 20.75 x 4.38. Accumulair brand 17.5x21x4.5 Rheem PD540010 style whole house air filters, specifically designed to replace name brand Rheem PD540010 filters. Fully assembled with no forming or combs required. MERV classified to ASHRAE grades assuring filtration equal to the name brand Rheem PD540010 filters. Note: Sample air filter pic as shown is not true to size and is there to show construction purposes only. Brand names and Rheem PD540010 P/N are listed for air filter replacement identification purposes.