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Intrepid 1640 Woodburning Stove

30000830

Masonry Chimneys, cont’d.

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Unused openings in an existing masonry chimney

must be sealed with masonry to the thickness of
the chimney wall, and the chimney liner should be
repaired. Openings sealed with pie plates or wallpa-
per are a hazard and should be sealed with mortar
or refractory cement. In the event of a chimney
ﬁre, ﬂames and smoke may be forced out of these
unused thimbles.

•

The chimney should be thoroughly cleaned before

use.

•

A newly-built masonry chimney must conform to the

standards of local building code, or, in the absence
of a local code, to a recognized national code. Ma-
sonry chimneys must be lined, either with code-ap-
proved masonry or precast refractory tiles, stainless
steel pipe, or a code-approved, “poured-in-place”
liner. The chimney clean-out door must seal tightly to
ensure a good draft.

Prefabricated Chimneys

A prefabricated metal chimney must be one that is test-
ed and listed for use with solid-fuel burning appliances
to the High-Temperature (H.T.) Chimney Standard
UL-103-1985 (2100°F.) for the United States, and High
Temperature (650°C) Standard ULC S-629 for Canada.

Chimney Size

This stove is approved for venting into a masonry chim-
ney with a nominal ﬂue size of 8” x 8” (203 x 203mm),
and into a round ﬂue size of 8” (203mm) or 6” (152mm).
It may be vented into larger chimneys as well. How-
ever, chimneys with liners larger than 8” x 12” (203 x
305mm) may experience rapid cooling of smoke and
reduction in draft, especially if they are located outside
the home. Such large chimneys may need to be insu-
lated or have the ﬂue relined for proper stove perfor-
mance.

Ask your dealer about components available for con-
necting the stove to a steel chimney liner.

Chimney Connector Guidelines

A chimney connector is the double-wall or single-wall
pipe that connects the stove to the chimney. The chim-
ney itself is a masonry or prefabricated structure that
encloses the ﬂue. Chimney connectors are used only
to make the connection from the stove to the chimney.
They are for interior use only.
Double-wall connectors must be tested and listed for
use with solid-fuel burning appliances. Single-wall con-
nectors should be made of 24 gauge or heavier steel,
and should be 6” (152mm) in diameter. Do not use
galvanized chimney connector; it cannot withstand the
high temperatures that can be reached by smoke and
exhaust gases, and may release toxic fumes under high
heat.
If possible, do not pass the chimney connector through
a combustible wall or
ceiling. If passage
through a combustible
wall is unavoidable,
refer to the recommen-
dations in the section
following on Wall Pass-
throughs. Do not pass
the connector through
an attic, a closet or
any similar concealed
space. The whole
chimney connector
should be exposed and
accessible for inspection and cleaning.
Install the single wall chimney connector not less than
18” (457mm) from the ceiling. Keep it as short and
direct as possible, with no more than two 90° turns. If
possible, use 45° elbows. Slope horizontal runs of con-
nectors upward 1/4” per foot (20 mm per meter) going
from the stove toward the chimney. The recommended
maximum length of a horizontal run is 3 feet (1 meter),
and the total length of chimney connector should be no
longer than 8’ (2.4meters).
In cathedral ceiling installations, extend the prefabricat-
ed chimney downward to within 8’ (2.4m) of the stove.