The Trane BAYFRAME235A is an air filter kit that fits the following air cleaner model:
The Trane BAYFRAME235A Filter Frame Kit - 23.5x5x5 contains 1 plastic frame and 1 BAYFTAHEXM expandable accordion filter. This Trane Perfect Fit Filter, when assembled, is identical to the Trane BAYFTAH23M 5 inch box filter. This Trane air filter is less expensive to buy and ship than regular 5 inch box filters.
The Trane BAYFRAME215A specifications: