Actual dimensions are 17.25 x 20.75 x 4.38. Brand: Accumulair. 17.5x21x4.5 Ruud RXHF-E17AM10 replacement whole house air filters, specifically built to substitute for the OEM Ruud RXHF-E17AM10 filters. Completely constructed with no assembly or combs required. MERV classified to ASHRAE 52.2 test specs assuring filtration equal to the original brand Ruud RXHF-E17AM10 air filters. Notice: The sample air filter picture shown is not to scale and is there to show style only. Company names and Ruud RXHF-E17AM10 identifier are used for filter substitution purposes.
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