The DuraTech Square Ceiling Support Box supports chimney pipe and provides a positive connection between the support box and the chimney pipe with a built-in twist lock feature. This ceiling support is suitable for both flat and cathedral ceiling applications and it can also be used in short attic spaces. Designed for appliances that are tested and listed for use with a 2100 Degree F HT chimney system, such as woodstoves, fireplaces, furnaces, boilers, stoves, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas. This Ceiling support fits between 16" on center joists and most mobile home applications and supports up to 60' of DuraTech Chimney. A 2" wide trim collar is included.
5"-8" DuraTech is a double-wall, all-fuel chimney system for use with wood stoves, fireplaces, furnaces, boilers, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas, and zero-clearance fireplaces that are factory-built.
Materials and Construction
5”-8” diameter pipe features inner wall of .020” 430 stainless steel. Outer wall options of .016” 430 stainless steel or .021” galvalume steel.
A Thermal Tech (ceramic refractory) blanket insulation is encased between walls. Stainless steel end rings seal the pipe.
DuraTech features light weight insulation, twist-lock fittings, support boxes with factory installed starter sections, elbows with 360° swivel base, select black finish pipe lengths, and five foot length pipe sections.
2" clearance to combustibles.
UL Listed with DuraVent shroud specifications. Information available online or call and request L157.
c-UL-us Listed to UL 103 HT and ULC S604 (MH7399) (Stainless steel outer wall required for installation in Canada.)
WHAT IS ALL-FUEL? A system designed and built to exhaust wood, coal, oil, or gas fired low heat residential appliances. These systems are commonly called a "Class A chimney" or a "Factory built chimney". These are mainly used on free standing stoves, furnaces, and fireplaces. This product comes in double wall or triple wall construction. This type of system is listed to UL 103, UL 103HT, ULC S629, or ULC S604.
With a Thermal Tech blanket insulation encased between dual walls, DuraTech offers the optimum in safety and performance. It keeps the outer wall of the chimney cool, while ensuring high flue gas temperatures for optimum draft performance.
The inner wall is 25% thicker than competitive chimneys for an extra margin of safety. No locking bands or mechanical fasteners required.
DuraTech's sleek 1" wall design provides for easy installations through 16" on-center framing. For tight installations, a Reduced Clearance Square Ceiling Support Box is available (6" diameter DuraTech only).