Actual Size: 20.75 x 20.25 x 5.25. Accumulair brand: 20x20x5 Philco MU2020 substitute whole house air filters, specifically engineered to replace the original manufacturer Philco MU2020 air filters. Fully assembled - no assembly or combs required. MERV rated to ASHRAE 52.2 test specs assuring operation to the level of the original brand Philco MU2020 air filters. Notice: The sample filter pic shown is not true to size and is shown for style purposes only. Brand names and Philco MU2020 P/N displayed for filter replacement identification purposes.
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