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How to Install DuraTech Chimney Systems

Jun 8th 2020

How to Install DuraTech Chimney Systems

Simpson DuraTech is an all-fuel chimney system designed for appliances that require a UL 103 or a UL HT chimney system, such as wood stoves, fireplaces, furnaces, boilers, stoves, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas, and zero clearance fireplaces that are factory-built. With a Thermal Tech blanket insulation encased between dual walls, DuraTech offers the optimum in safety and performance. Inner wall .020" 430 stainless steel. Outer wall options of .016" 430 stainless steel or .021" galvalume steel. A ceramic refractory blanket insulation is encased between walls. Stainless steel end rings seal the pipe. It keeps the outer wall of the chimney cool, while ensuring high flue gas temperatures for optimum draft performance. No locking bands or mechanical fasteners required. DuraTech's sleek 1" wall design provides for easy installation, such as 5"-8" diameter pipe installation through 16" on-center rafters. A black finish is available in 6", 9", and 12" pipe lengths. DuraTech carries a limited-lifetime warranty.

2" clearance to combustibles.

Designed for normal, continuous operation at 1000 degrees F flue gas temperatures, DuraTech (5"-8" diameters) is subjected to rigorous and stringent HT requirements of the UL standard, including on hour at 1400 degrees F, plus three ten-minute chimney fire tests at 2100 degrees F.

DuraTech 10"-24" diameters is tested and listed for continuous operation at 1000 degrees F flue gas temperatures, one hour at 1400 degrees F, and three, ten-minute chimney fire tests at 1700 degrees F, in accordance with UL 103 test standards.

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

DuraTech Chimney System Diagram
DuraTech Chimney Pipe

DuraTech Chimney Pipe

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Typical Installations

Using the Typical Venting Installation drawings, select the appropriate component parts for your installation.

DVL/DuraBlack Chimney Adapter must be used when connecting DVL pipe to a ceiling support box or finishing collar. When connecting DuraBlack pipe, a DuraBlack Slip Connector or Snap-Lock Adapter must be used.

Wall Thimble must be installed with an appropriate length of chimney pipe for all horizontal through-the-wall installations. To accommodate thicker walls, the telescoping pieces can be separated, and a field-fabricated extension may be installed.

Attic Insulation Shield must be used in all installations that pass through an attic, regardless of the attic insulation.

Firestop Radiation Shield must be used when a chimney passes through a floor or ceiling without a support box.

Cathedral Ceiling

Cathedral Ceiling Diagram for Chimney Pipe

Oil Furnace

Oil Furnace Diagram for Chimney Pipe

Attic Offset

Attic Offset Diagram for Chimney Pipe

Through The Wall

Through the Wall Chimney Pipe Diagram

Fireplace (New or retrofit)

New or Retrofit Fireplace Chimney Pipe Diagram

Installation Key

Key: Installation Steps
1 DVL or DuraBlack 11 Tee with Tee Cap
2 Ceiling Support Box 12 Tee Support
3 Wall Thimble 13 Chase Top Flashing
4 Chimney Pipe 14 Base Tee/Double Tee
5 Attic Insulation Shield 15 Anchor Plate or Anchor Plate with Damper
6 Flashing 16 Roof Support
7 Storm Collar 17 Finishing Collar
8 Chimney Cap 18 DVL Adapter, DuraBlack Slip Connector, or Snap-Lock Adapter
9 Elbow 19 Stove Adapter
10 Elbow Strap 20 ...

Be fire-safe! Maintain at least a minimum 2" clearance (air space) to combustibles. Use proper support and bracing. Follow local building codes and have your chimney inspected by a certified professional.