Actual dimensions are 20.1 x 25.7 x 5. Accumulair brand: 21x26x5 Trane BAYFTAH26M compatible whole house air filters, exactly built to replace the original brand Trane BAYFTAH26M air filters. Fully assembled with no forming or combs required. MERV classified to ASHRAE specifications assuring function as good or better than the original manufacturer Trane BAYFTAH26M filters. Notice: Example filter image shown is not the actual dimensions and is shown for design purposes. Name brands and Trane BAYFTAH26M P/N are shown for filter style purposes.
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