UL 103HT|cUL S604

• DuraTech Chimney Pipe 2 in clearance to combustibles

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 sleek 1 in wall design provides for easy installations through 16 in on center framing. For tight installations, a reduced clearance square ceiling support box is available (6 in diameter DuraTech only). Designed for normal, continuous operation at 1000 deg F flue gas temperatures, DuraTech is subjected to rigorous and stringent high temperature requirements of the UL standard, including one hour at 1400 deg F, plus three ten min chimney fire test at 2100 deg F.