8DT-CS24 Square Ceiling Supprot Box 8" x 24"

The DuraVent 8DT-CS24-2 is an 8-inch diameter, 24-inch square ceiling support box designed for DuraTech Class A Chimney Systems. It supports up to 60 feet of chimney pipe, fits standard 16-inch on-center joists, and works with flat or cathedral ceilings.