cUL Listed, US Listed, to UL 103 HT and cUL S604 (MH7399)

• Roof Flashing 2 in clearance to combustibles Lightweight construction Roof flashing used to weather-proof the penetration of vent pipe through the roof, storm collar required Select roof flashing based on pitch of roof for pitches of 0/12 thru 6/12 in and 7/12-12/12 styles

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. Designed for normal, continuous operation at 1000 deg F flue gas temperatures, DuraTech is subjected to rigorous and stringent high-temperature requirements of 1 hr at 1400 deg F, plus three 10 min chimney fire test at 2100 deg F.