Description
Actual dimensions are 17.25 x 20.75 x 4.38. Accumulair brand, 17.5x21x4.5 Ruud PD540010 compatible whole house filters, specifically designed to replace name brand Ruud PD540010 filters. Fully built so no assembly or combs needed. MERV rated to ASHRAE 52.2 test specs ensuring function to the level of the OEM Ruud PD540010 air filter. Note: Example filter pic shown is not the actual dimensions and is shown for configuration only. Brand names and Ruud PD540010 P/N are listed for filter style identification purposes.