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Double Wall

Chimney

UL103 and UL103HT Rated

High Temperature
Blanket Insulation

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 Standard 103, UL103HT, CAN/ULC S-629-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
Inner duct 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

Clearances

DUCT MODEL	INNER DIAMETER (ID)	OUTSIDE DIAMETER	CLEARANCE TO COMBUSTIBLES	CLEARANCE TO NON-COMBUSTIBLES
DW-2R HT	5" - 16"	ID+4	2"	0"

* 2" clearance to combustibles from the surface of the duct outer shell.

Installation Details

Chimney Assembly
Base Cap

Vertical
Support Fire
Stop Vented
Curb Transition
Plate Chimney Cap Ceramic
Gasket Chimney

Product Resources

Clearances »
Promotional Handout »
Designing Air Flow Systems »
Formulas »
Double Wall Operation & Installation Manual »
Double Wall Operation & Installation Manual (French) »
Product Information »
Written Specification »

The Double Wall Ductwork Series has 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-2R Type HT is UL Listed under file number MH60233 and complies with UL103, UL103HT, CAN/ULC-S629-M87, and ULC/ORD-C959-1993.

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