Description
Actual Dimensions: 17.25 x 20.75 x 4.38. Accumulair brand 17.5x21x4.5 Ruud PD540016 style whole house air filters, exactly engineered to replace original brand Ruud PD540016 filters. Fully box-formed so no assembly or combs needed. MERV classified to ASHRAE classifications establishing particle capture to the level of the original manufacturer Ruud PD540016 filter. Notice: Sample filter pic shown is not the actual dimensions and is shown for configuration purposes. OEM names and Ruud PD540016 part numbers are listed for air filter substitution purposes.