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Double Wall
Chimney
UL103 and UL103HT Rated

Blanket Insulation
Clearances
DUCT MODEL |
INNER DIAMETER (ID) |
OUTSIDE DIAMETER |
CLEARANCE TO COMBUSTIBLES |
CLEARANCE TO NON-COMBUSTIBLES |
---|---|---|---|---|
DW-2R HT | 8" - 16" | ID+4 | 2" | 0" |
Installation Details
Chimney AssemblyBase Cap
Vertical
Support Fire
Stop Vented
Curb Transition
Plate Chimney Cap Ceramic
Gasket Chimney
Support Fire
Stop Vented
Curb Transition
Plate Chimney Cap Ceramic
Gasket Chimney
Dye Penetrant Testing
All ductwork is tested at the factory
for quality assurance.
for quality assurance.
Product Resources
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.