Osburn Stoves by SB I 2200 - Manual (Page 9)

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1.5.3.1 Connectors
The minimum connector diameter is 6" (152 mm). A minimum connector length of 4 ft (1.22 m) is
recommended for best results. Restrictions to stack gas flow (such as using more than two 90
o
elbows) should be avoided and any horizontal runs should be kept to a minimum length, especially
with short chimneys. The connector pipe, which joins the unit to the chimney, may be of either
single or double walled construction. Connector pipe should be a minimum of 24-gauge steel.
The connector pipe itself must not pass through any combustibles, nor may it pass through non-
combustibles and into a concealed space (such as an attic, roof space, or closet). If passing through
a wall, ceiling, or into a masonry chimney, use either chimney components listed for that specific
use, or means acceptable to local authorities having jurisdiction over the installation.
Install sections of single wall or double wall connector between the stove and the chimney. Secure
all connector pipe joints with a minimum of three sheet metal screws. All connector and factory
built chimney pipes must be installed with the male or crimped end down to prevent creosote
dripping outside the joints. If non-telescopic sections are to be used, they must be cut to length,
allowing for overlap. Use three (3) screws to attach the connector section to the flue collar of the
stove. Listed double walled connectors should be installed in accordance with the vent
manufacturer’s installation instructions.
Figure 1.2 - Joints in Chimney System
1.5.3.2 Chimney Systems
The minimum chimney size is 6" (152 mm) in diameter. The minimum overall height of the
chimney system, measured from the base of the appliance is 12' (3.66m). Existing masonry and
metal chimneys should be inspected to check for deterioration and to determine if they meet the
minimum installation requirements; they should be upgraded if necessary. In Canada, masonry
chimneys must have or use a ULC S635 listed Class III liner in chimney systems that are not ULC
S629 listed. Similarly in the USA a UL 1777 listed refractory or metallic liner must be used. At
the point of penetration through the roof to the outside of the building envelope, the chimney must
extend at least 3' (914 mm) above the roof and at least 2' (610 mm) above the highest point within
an area of 10' (3 m) of the chimney (see Figure 1.3).