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Chimney

UL103, UL103HT, and UL2561 Rated

Chimney

Single Wall Chimney

Ideal for use in commercial and industrial applications which require a listed chimney system, such as venting solid fuel appliances or hot water heaters.
  • UL Listed to UL standards UL103, UL103(HT), UL2561, and ULC/ORD-C959-1993
  • Chimney diameters range from 5" to 16"
  • Model DW available for Negative Pressure Industrial or Commercial Appliances
  • Model DW available for Positive Pressure Industrial or Commercial Appliances

    Model DW for use at maximum 60 inch water column internal pressure when used in Positive Pressure Applications

  • Rated for continuous operation at 1000 degrees F and intermittent operation at 2100 degrees F in United States (UL103HT)
  • Rated for continuous operation at 600 degrees F and intermittent operation at 2100 degrees F in Canada (ULC/ORD-C959-1993)
  • Rated for continuous operation at 1400 degrees F and intermittent operation at 1800 degrees F in United States and Canada (UL2561)
Double Wall Chimney

Single Wall Clearances

Single Wall Chimney
Diameters		 Single Wall Chimney Thimble Assembly Shell Diameter (Thru Penetration) Single Wall Chimney Thimble Assembly Clearance To Combustibles (Shell to Joist) UL103 - Clearance To Combustibles (Single Wall Chimney to ceiling) UL2561 - Clearance To Combustibles (Single Wall Chimney to ceiling) Clearance To Non-Combustibles Through Floor Opening
5" 9" 2" 18" 36" 0" 13-1/2"
6" 10" 2" 18" 36" 0" 14-1/2"
7" 11" 2" 18" 36" 0" 15-1/2"
8" 12" 2" 18" 36" 0" 16-1/2"
10" 14" 2" 18" 36" 0" 18-1/2"
12" 16" 2" 18" 36" 0" 20-1/2"
14" 18" 2" 18" 36" 0" 22-1/2"
16" 20" 2" 18" 36" 0" 24-1/2"
* 2" clearance to combustibles from the surface of the duct outer shell.

Double Wall Chimney

Ideal for use in commercial and industrial applications which require a listed chimney system, such as venting solid fuel appliances or hot water heaters.
  • UL Listed to UL standards UL103, UL103(HT), UL2561, CAN/ULC-S629-M87, and ULC/ORD-C959-1993
  • Duct sections are constructed of an inner wall and outer wall with insulation in between - inner duct is Single Wall (DW Series) and outer shell is stainless steel
  • Chimney inner diameters range from 5" to 16"
  • Model 2R Type HT available for Negative Pressure Industrial or Commercial Appliances
  • Model 2R Type HT available for Positive Pressure Industrial or Commercial Appliances

    Model 2R Type HT for use at maximum 60 inch water column internal pressure when used in Positive Pressure Applications

  • Rated for continuous operation at 1000 degrees F and intermittent operation at 2100 degrees F in United States
  • Rated for continuous operation at 600 degrees F and intermittent operation at 2100 degrees F in Canada
  • Rated for continuous operation at 1400 degrees F and intermittent operation at 1800 degrees F in United States and Canada (UL2561)
Double Wall Chimney

Double Wall Clearances

Double Wall Chimney DW-2R HT Diameters Double Wall Chimney Thimble Assembly Shell Diameter (Thru Penetration) Double Wall Chimney Thimble Assembly Clearance To Combustibles (Shell to Joist) Clearance To Non-Combustibles Through Floor Opening
5" 9" 2" 0" 13-1/2"
6" 10" 2" 0" 14-1/2"
7" 11" 2" 0" 15-1/2"
8" 12" 2" 0" 16-1/2"
10" 14" 2" 0" 18-1/2"
12" 16" 2" 0" 20-1/2"
14" 18" 2" 0" 22-1/2"
16" 20" 2" 0" 24-1/2"
* 2" clearance to combustibles from the surface of the duct outer shell.

Product Resources

The Single Wall and Double Wall Chimney Series have been certified by UL. This certification mark indicates that the product has been tested to and has met the minimum requirements of a widely recognized (consensus) U.S. Product safety standard, that the manufacturing site has been audited, and that the applicant has agreed to a program of periodic factory follow-up inspections to verify continued performance.


Model DW (Single Wall) and model DW-2R Type HT (Double Wall) is UL Listed under file number MH60233 and complies with UL103, UL103HT, UL2561, CAN/ULC-S629-M87 (Double Wall), and ULC/ORD-C959-1993.