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CHIMNEY REQUIREMENTS
VENTING COMPONENTS
Chimney Connector:
It is also known as flue pipe or stove pipe. The chimney
connector joins the stove to the chimney. It must be a
6 inch (152mm) minimum diameter 24 gauge mild steel
black 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 connec-
tor 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 manu-
facturer for manufactured thimbles for masonry chimney
and prefabricated chimneys.
Chimney:
The chimney can be new or existing, masonry or prefab-
ricated and must meet the following minimum require-
ments specified in Section 5B.B.
Figure 5.1 Prefabricated Exterior Chimney
CHIMNEY SYSTEMS
Prefabricated Metal Chimney
• Must be a 6 inch (152mm) diameter (ID) high tempera-
ture chimney listed to UL 103HT (2100°F) or ULC S627.
• Must use components required by the manufacturer for
installation.
• Must maintain clearances required by the manufacturer
for installation.
• Refer to manufacturers instructions for installation.
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-S629,
STANDARD FOR 650°C FACTORY-BUILT CHIMNEYS.
Figure 5.2 Prefabricated Interior Chimney
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