Description
Actual dimensions are 20.75 x 24.25 x 4.38. Accumulair brand: 21x24x4.5 Ruud Protech 540014 substitute whole house filters, specifically constructed to be an alternative to the OEM Ruud Protech 540014 filters. Completely box-formed so no forming or combs needed. MERV classified to ASHRAE classifications ensuring particle filtration equal to the original brand Ruud Protech 540014 filter. Notice: The sample filter pic as shown is not the actual dimensions and is shown for design purposes only. Company names and Ruud Protech 540014 identifier are shown for filter substitution identification only.