Trane DPFTFCAH26P Merv 8 Replacement Filter Nominal size 21 x 26 x 1 (Actual size 20 x 25 5/8 x 3/4) Can be used to replace washable pre-filter #BAYFTAH26W1A. Economical&#44; high-capacity media makes this filter an ideal upgrade from standard fiberglass throwaways. Captures a wide variety of airborne allergens including dust&#44; mold&#44; pet dander&#44; and dust Lasts up to 3 months.