The Chimney; Chimney Installation Notes - Osburn STRATFORD Installation Instructions Manual

3.

THE CHIMNEY

3.1

CHIMNEY INSTALLATION NOTES

1. If possible, install an interior chimney as it will provide better performance. In areas with
continuous temperatures below 18 C (0 F), the use of an exterior chimney increases the
likelihood of operating problems such as low draft, high rate of creosoting, and poor start-up
characteristics. Exterior chimneys are also prone to down-drafting and flow reversal.
Installations, which are located on lower floors in the house, such as in a basement, in
combination with outside chimney, are especially prone to flow reversal.
2. The OSBURN STRATFORD is listed only with chimney systems described in table 1.
3. A chimney venting a fireplace shall not vent any other appliance.
4. The minimum chimney system height for a straight installation is 15 ft. (4.6 m) including the
height of the fireplace itself.
5. All chimney installations must include at least one support. Reducing the amount of chimney
weight on the fireplace will help avoid the noise created when the fireplace expands. This can
be achieved by having the chimney supported by the supports. The maximum chimney length
that should be supported by the fireplace is 9 ft. (2.75 m) for 2" Solid Pack Chimney and 12
ft. (3.7 m) for 1" Solid Pack Chimney.
6. The chimney must extend at least 3 ft. (92 cm) above its point of contact with the roof and at
least 2 ft. (61 cm) higher than any wall, roof or building within 10 ft. (3.1 m) of it. See
Figure 36a and 36b to determine the configuration that applies to your roof (flat or sloped
roof and the distance between the chimney and the highest point of the roof and/or the nearest
chimney).
7. Deviations should be avoided whenever possible, especially the most pronounced. Each
deviation adds some restriction to the chimney system and may lead to draft problems.
8. If the chimney extends higher than 5 ft. (1.5 m) above its point of contact with the roof, it
must be secured using a roof brace.
9. A rain cap must be installed on top of the chimney. Failure to install a rain cap may cause
corrosion problems.
10. Cut and frame square holes in all floors, ceilings, and roof that the chimney will go through
to provide a 2" (50 mm) minimum clearance between the chimney and any combustible
materials. Do not fill this 2 space with insulation or any other combustible material.
11. Portions of the chimney which may extend through accessible spaces must be enclosed to
avoid contact with combustible materials or damage the chimney.
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