13
Codes require that solid-fuel chimneys
extend 3 ft (0.9 m) above the point at which they
exit from the roof, provided that no part of any
structure is within the top of the chimney, then
the chimney must extend 2 ft (6 m) above the
highest point with the 10 ft (3 m) radius top
height. If there is not ten feet of clearance from
the top of the chimney, then the chimney must
extend 2 ft (6m) above the highest point with the
10 ft (3m) radius.
Do not connect this unit to a chimney flue servicing
another appliance.
NOTE: The restriction of not venting
more than one appliance to the same flue applies
to the
U.S. specifically. While it is not recom-
mended that you use the same chimney for more
than one appliance, in
Canada certain exceptions
may be made. Be sure to contact your building
code inspection official to see if this option is
permitted in your area, and to find out the spe-
cific requirements for such an installation.
Existing Masonry Chimneys
If you plan on using a pre-existing
masonry chimney, have it thoroughly inspected
and cleaned. Any faults which make the chim-
ney unsafe and unusable must be repaired prior
to use. These can include improper height,
structural defects, blockages, inadequate clear-
ance to combustibles, unsealed openings into
other rooms of the house, signs of creosote or
smoke leakage, a loose or absent clean-out door,
or absence of a liner.
Do not connect to any air distribution
duct or system
Venting to a Masonry Chimney
When connecting to a masonry chimney,
several provisions are standard. First, whether the
chimney connector is vented to the chimney
through a thimble or a breech pipe, neither must
pass beyond the inner surface of the chimney liner,
and both must be firmly cemented in place with
refractory cement. (A thimble is a masonry pipe
which is inserted through the chimney wall, and is
frequently the preferred method; a breech pipe is a
piece of steel pipe used the same way.) In Canada,
a breech pipe has ridges or protrusions to lock it
firmly into the refractory cement. In either case, the
chimney connector vents to the chimney through
the thimble or breech pipe.
Using a thimble, the connector slides com-
pletely inside the masonry to the inner edge of the
flue liner, and may be easily removed for chimney
and connector inspection. A breech pipe must
extend at least 2" (50 mm) into the room, so the
connector can be attached with sheetmetal screws.
Venting to a Masonry Fireplace Chimney
In some situations, a code compliant chim-
ney originally used for a masonry fireplace may be
used to install your 44 Magnum. In addition to the
requirements found in the previous paragraphs, it is
important to be aware that all clearances must be
met, including those from the chimney connector to
combustibles — 18" (360 mm) to sides and 18"
(450 mm) to ceiling. Do not forget to include floor
protection in your plans. (See Clearances and Floor
Protection in this section.) Since many fireplaces
have exposed wooden mantels and trim, pay special
attention to the clearances necessary to these materi-
als.
If your fireplace chimney is behind a combus-
tible wall, you must use an approved wall pass-
through system to gain access to the masonry
chimney. The chimney connector must enter the
chimney at a place where it is lined, and the fire-
place must be made inoperable. For example, you
might remove the damper, replacing it with a secure,
airtight, noncombustible seal (removable for inspec-
tion). This also satisfies the requirement that the
room air must not be allowed to enter the chimney.
Summary of Contents for 44 Magnum
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