Insulated Wall Thimble, 8" Diameter, DuraTech - 8DT-IWT

8DT-IWT is a insulated wall thimble. Adjusts from a minimum of 5 ½“ to a maximum of 9 ½” wall thickness, fits between standard wall studs and the interior trim is painted black. To accommodate thicker walls, the telescoping pieces can be extended up to 16” when a field-fabricated extension is installed. The Wall Thimble must be installed with DuraTech chimney pipe horizontally through the walls and extend 6” into the room beyond the interior walls. Exterior trims for the wall thimble are available.

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.

Applications

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.

Listings
c-UL-us Listed to UL 103 HT and ULC S604 (MH7399) (Stainless steel outer wall required for installation in Canada.)

Clearances
2″ clearance to combustibles.

Genuine OEM part

Click to Download Catalog

Click to Download Installation Instructions

Click to Download Supplement