Trane / American Standard BAYFTAH21M Aftermarket Panel Filter, 20x21x5, MERV 13TRF21x21.5x5M13 $104.00 SKU: TRF21x21.5x5M13 Back $104.00 Quantity -+ Add to Cart Details Trane / American Standard BAYFTAH21M Aftermarket Panel Filter, 20x21x5, MERV 13 DetailsBackDetailsTrane / American Standard BAYFTAH21M Aftermarket Panel Filter, 20x21x5, MERV 13See MoreSee Less