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4. THE CHIMNEY
4.1 CHIMNEY INSTALLATION NOTES
1. Always 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. If
interior installation is impossible, install an AC chimney enclosed in an insulated chase.
2. The Security fireplace model BRENTWOOD can only be install with Security Chimneys
International Ltd 6" diameter model AC (Air Cool) chimney system.
3. A chimney venting a fireplace shall not vent any other appliance.
4. The minimum chimney height is 12 ft. (3.7 m). In altitude, add 18" (450 mm) to the
chimney for every 2000 feet (600 m) above sea level.
5. All chimney installations must include at least one support. The maximum length of
chimney that can be supported by the fireplace is 26 ft. (8 m).
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 21).
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.
10. Portions of the chimney which may
extend through accessible spaces must be
enclosed to avoid contact with
combustible materials or damage the
chimney.
Figure 21