The Trane BAYFTAH23W1A is the correct pre-filter for the following enclosures:
The Trane Perfect Fit BAYFTAH23W1A Prefilter 23.5x21x1 is an OEM replacement filter from Trane that features a MERV 5 rating for the reduction of airborne particulates. This Trane Perfect Fit filter fits 23 1/2" enclosures and measures approximately 23.5" x 21" x 1". This Trane furnace filter is both washable and reusable.
Trane Perfect Fit BAYFTAH23W1A Prefilter 23.5x21x1 specifications: