Connectors; Chimney Systems - Osburn 1800 Owner's Manual

1.5.3.1 Connectors

The minimum connector diameter is 6" (152 mm). A minimum connector length of 4 ft (1.22 m) is
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recommended for best results. Restrictions to stack gas flow (such as using more than two 90 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).
Follow CSA Standard B365-M91 for methods and precautions to be employed when connecting the
stove to a masonry chimney, and for installing thimbles (wall penetration assemblies) when the
connection from the stove to the masonry chimney is made through a combustible wall.
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