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).

Designed for normal, continuous operation at 1000°F flue gas temperatures, DuraTech is subjected to rigorous and stringent high temperature requirements of the UL standard, including one hour at 1400°F, plus three ten-minute chimney fire test at 2100°F.

What's Included

• Ceiling Support Box
• Collar

Features

• Use with flat, vaulted, or cathedral ceilings where there is an attic space above.
• Supports up to 60’ of DuraTech Chimney.
• The additional Insulation Collar now enables the support box to be qualified as an Attic Insulation Shield.
• The additional Attic Insulation Shield (DT-AIS) is not required with these support boxes.
• Integrated adapter accepts either single-wall or double wall stovepipe.
• Support Box includes Integrated Starter-Coupler, Integrated Flue Extension, Square-to-round Collar and 2-piece Black Ceiling Trim.

Specifications