Description
Actual size is 17.25 x 20.75 x 4.38. Accumulair brand: 17.5x21x4.5 Rheem PD540016 substitute whole house filters, specifically engineered to replace the name brand Rheem PD540016 filters. Fully built so no forming or combs required. MERV classified to ASHRAE 52.2 test specifications establishing particulate filtration equal to the name brand Rheem PD540016 air filter. Note: The example filter pic shown is not to scale and is there to show construction only. Trade names and Rheem PD540016 part numbers displayed for air filter substitution identification.