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DuraStack® Pro

DuraStack Pro

Note: Available through Exclusive Representation only, please contact your Commercial Sales Manager for more information.

The DuraStack Pro Series, Models DIS1, DIS2, DIS4 and DAS1 venting systems, are designed to offer the ultimate in installation convenience and versatility for a variety of applications. Certified for commercial chimney and diesel exhaust applications, they are constructed of thick-gauge material for the inner pipe that provides a strong and rigid assembly. Featuring a self-centering flue extension design that significantly simplifies and accelerates the installation process.

Available in sizes from 5" to 36" diameters, the DIS line offers double-wall configuration with a choice of 1", 2" or 4" insulation and the DAS line offers a 1" air insulated product. For premium corrosion resistance and durability, the inner flue is constructed from 0.035" thick Stainless Steel 304 or 316 Stainless Steel. This is coupled with a 0.024" thick 304 Stainless Steel or Galvalume (Aluminum-zinc coated) steel outer casing. The DIS line features the highest-quality insulation, densely packed to ensure low heat loss and maximum draft.

  • Specifications
  • Typical Installation
  • Literature

DuraStack Pro is available in the following configuration.
DIS1: 1" insulated
DIS2: 2" insulated
DIS4: 4" insulated
DAS1: 1" air insulated
Applications include: Low and High-Pressure Steam Boilers; Diesel and Turbine Exhaust; Building Heating Equipment. Industrial Furnaces; Processing Equipment; Kilns and Ovens; Grease Duct.

Materials and Construction
Inner Wall Material Thickness
5" - 18" .035" Laser welded, 304 or 316
20" - 36" .035" Plasma welded, 304 or 316

Outer Wall Material Thickness
5"- 12" .024" Laser welded, 304, Galvalume
14"- 36" .024" Pittsburg Lock, 304, Galvalume



UL 103, 60-in. Positive Pressure and 1400°F Building Heating Appliance Chimney.
Type HT listing, for solid fuel application (only for Models DIS1, DIS2, DIS4, for diameter 5"to 24").

ULC/ORD C959 540°C (1000°F) and 760°C (1400°F) rating.
ULC S604, Type A chimney

Typical installation for Diesel Generator Exhaust


Typical Installation for Boiler Application