Actual dimensions are 20.75 x 24.25 x 4.38. Accumulair brand 21x24x4.5 Ruud Protech 540014 compatible whole house filters, specifically constructed to replace OEM Ruud Protech 540014 filters. Fully built so no forming or combs required. MERV graded to ASHRAE grades ensuring particle capture equal to the original brand Ruud Protech 540014 air filter. Photo: Example air filter picture displayed is not to scale and is displayed for style only. OEM names and Ruud Protech 540014 P/N are listed for air filter style identification purposes only.
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