Actual Dimensions: 20.7 x 26.2 x 5. Accumulair brand, 21x27x5 Trane BAYFRAME21A replacement whole house filters, specifically designed to be an alternative to the original brand Trane BAYFRAME21A air filters. Completely built with no forming or combs required. MERV graded to ASHRAE 52.2 test specifications ensuring particle capture equal to the name brand Trane BAYFRAME21A air filters. Notice: The sample air filter picture as shown is not to scale and is shown for configuration purposes. Name brands and Trane BAYFRAME21A part numbers are used for filter replacement identification purposes.
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