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4.
THE CHIMNEY
4.1
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 draught, 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 Security fireplace model BIS ULTIMA is listed only with Security Chimneys
International Ltd 6" diameter chimney systems.
3. A chimney venting a fireplace shall not vent any other appliance.
4. The minimum chimney height is 12 ft. (3.7 m).
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 can be supported by the fireplace is 9 ft. (2.75 m) for
S-2100+/HT6000+, 12 ft. (3.7 m) for ASHT+ / HT6103+ and 26 ft. (8 m) for AC
chimney. In altitude, add 18" (450 mm) to the chimney for every 2000 feet (600 m) above
sea level.
6. The chimney must extend at least 3 ft. (915 mm) above its point of contact with the roof
and at least 2 ft. (610 mm) higher than any wall, roof or building within 10 ft. (3m) of it
(Figure 24).
7. If the chimney extends higher than 5 ft.
(1500 mm) above its point of contact with
the roof, it must be secured using a roof
brace.
8. A rain cap must be installed on top of the
chimney. Failure to install a rain cap may
cause corrosion problems.
9. Cut and frame square holes in all floors,
ceilings, and roof that the chimney will go
through to provide a 2" (50 mm)
clearance between the chimney and any
combustible materials. Do not fill this 2"
space with insulation or any other
combustible material.
Portions of the chimney which may
10.
extend through accessible spaces must be
enclosed
combustible materials or damage the
chimney.
to
avoid
contact
with
22
Figure 24
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