Actual size is 20.1 x 23.2 x 5. Accumulair brand 21x23.5x5 Trane TFM235B0AH01 substitute whole house air filters, exactly designed to replace the OEM Trane TFM235B0AH01 air filters. Fully constructed with no forming or combs needed. MERV graded to ASHRAE specs assuring particulate capture to the level of the original brand Trane TFM235B0AH01 air filters. Photo: Example filter pic shown is not true to size and is included to show construction only. Brand names and Trane TFM235B0AH01 P/N are used for filter replacement purposes.
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