Vermont Castings • Dauntless FlexBurn Installation Manual_R8 • 2020 - ___ • 11/21
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3-90-586000i
B. Venting Components
Chimney Connector:
It is also known as flue pipe or
appliance pipe. The chimney connector joins the appliance
to the chimney. It must be a 6” (152 mm) minimum diameter
24 gauge mild steel black or 26 gauge blued steel, or an
approved air-insulated double wall venting pipe.
Thimble
: A manufactured or site-constructed device installed
in combustible walls through which the chimney connector
passes to the chimney. It is intended to keep the walls
from igniting. Site constructed thimbles must meet NFPA
211 Standards. Prefabricated must be suitable for use with
selected chimney and meet UL103 Type HT Standards. Follow
instructions provided by the manufacturer for manufactured
thimbles for masonry chimney and prefabricated chimneys.
Chimney
: The chimney can be new or existing, masonry
or prefabricated and must meet the following minimum
requirements specified in Section 4B.
C. Chimney Systems
Prefabricated Metal Chimney
• Must be minimum 6” (152 mm) diameter (ID) high
temperature chimney listed to UL 103 HT (2100 °F) or
ULC S629M.
• Must use components required by the manufacturer for
installation.
• Must maintain clearances required by the manufacturer
for installation.
• Refer to manufacturers instructions for installation.
Chimney
Connector
Insulated " T "
Flashing
Listed Termination Cap
Listed Chimney
Storm Collar
Wall Support
Roof Brace (if required)
Thimble
Trim Collar on Inside Wall
Floor
Protection
Figure 4.1
- Prefabricated Exterior Chimney
NOTE:
In Canada when using a factory-built chimney it
must be safety listed,
Type UL103 HT (2100 °F) CLASS
“A”
or conforming to
CAN/ULC-S629M, STANDARD
FOR 650 °C FACTORY-BUILT CHIMNEYS.
Floor
Protector
Chimney
Connector
Ceiling Support
Listed Chimney
Storm Collar
Flashing
Listed
Termination Cap
Figure 4.2
- Prefabricated Interior Chimney
