The DuraVent 6DT-CS24R DuraTech Ceiling Support Box, part number 6DT-CS24R, is a 6-inch inner diameter square ceiling support box designed to support and stabilize DuraTech chimney pipe installations passing through flat ceilings. With a 24-inch height, this support box provides structural support for vertical chimney runs while maintaining required clearances to combustible materials. It is engineered for use in residential wood stove, fireplace, and other solid-fuel venting applications utilizing DuraVent DuraTech chimney systems.
Supports chimney pipe and provides a positive connection between support box and chimney with a built-in twistlock. Suitable for both flat and cathedral (A-Frame) ceiling applications. Also use in short attic spaces (see instructions). Fits between standard 16” on-center joists and most manufactured home applications. Supports up to 60' of DuraTech Chimney. Use adapter to attach DVL or DuraBlack to the support box. A 2” wide trim collar is included. Painted black. (For adapters see DVL/DuraBlack section.) SIZE 5” 6” 7
This ceiling support box is installed between ceiling joists to carry the weight of the chimney system and properly align the vertical vent path. It must be used as part of a complete 6-inch DuraTech chimney system and installed in accordance with manufacturer instructions and local building codes. Proper framing, clearance, and support are essential to ensure safe chimney operation and long-term structural stability.
What’s Included: One DuraVent 6DT-CS24R 6-inch square ceiling support box (24-inch height).
Installation Limits: For use only with 6-inch DuraVent DuraTech chimney systems; must be installed through flat ceilings with proper framing and required clearances to combustibles.
Compatibility: Compatible with 6-inch DuraVent DuraTech chimney pipe components and approved solid-fuel heating appliances.
