Actual dimensions are 20.75 x 20.25 x 5.25. Brand: Accumulair. 20x20x5 Nordyne 918377 substitute whole house air filters, exactly constructed to be an alternative to the name brand Nordyne 918377 air filters. Fully constructed - no forming or combs needed. MERV graded to ASHRAE 52.2 test ratings establishing filtration equal to the OEM Nordyne 918377 air filters. Photo: Example filter picture as displayed is not the actual dimensions and is displayed for design purposes only. Company names and Nordyne 918377 identifier are shown for filter style identification.
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