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Brick or modular block must be a minimum of 4" (10 cm)
nominal thickness. Stone construction must be at least 12"
(30 cm) thick.
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A newly-built chimney must conform to local codes, or, in
their absence, must comply with national regulations.
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An existing chimney must be inspected by a professional
licensed chimney sweep, fire official, or code officer to ensure
that the chimney is in proper working order.
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No other appliance may be vented into the same flue.
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An airtight clean-out door should be located at the base of
the chimney.
2.2 Prefabricated Chimneys
A prefabricated metal chimney must be tested and listed for
use with solid fuel burning appliances. High Temperature (HT)
Chimney Standard UL 103 for the U.S. and High Temperature
Standard ULC S-629 for Canada.
The manufacturer's installation instructions must be followed
precisely. Always maintain the proper clearance to combustibles
as established by the pipe manufacturer. This clearance is usually
a minimum of 2", although it may vary by manufacturer or for
certain chimney components.
2.3 Chimney Height
The chimney must be at least 3 feet (92 cm) higher than the
highest point where it passes through the roof and at least 2 feet
(61 cm) higher than the highest part of the roof or structure that
is within 10 feet (3.05 m) of the chimney, measured horizontally.
See figure 3.
Chimneys shorter than 14 feet (4.27 m) may not provide adequate
draft. Inadequate draft can result in smoke spillage when loading
the stove, or when the door is open. Poor draft can also cause back
puffing (ignition of gas build-up inside the firebox) and sluggish
performance. The minimum height does not, in itself, guarantee
proper chimney performance.
Excessive chimney height can promote over-strong draft resulting
in high stove temperatures and short burn times. Excessive draft
can be corrected by installing a butterfly damper. Your Jøtul dealer
is an expert resource to consult regarding draft issues or other
performance-related questions.
2.4 Wall Pass-Throughs
In the U.S.
The National Fire Protection Association's publication, NFPA
211, Standard for Chimneys, Fireplaces, Vents and Solid Fuel
Burning Appliances permits four methods for passing through
a combustible wall. Before proceeding with any method be sure
to consult with your local building officials to discuss any local
code requirements.
Common Method:
See figures 4 and 5. Remove all combustible materials from
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the pass-through area ( around the chimney connector), a
minimum 12" (30.5 cm). A 6" (15.2 cm) diameter connector
will require a 31" x 31" (78.7 x 78.7 cm) square opening.
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The opening must be filled with at least 12" (30.5 cm) of
brick around a fireclay liner. The liner must be ASTM C35 or
equivalent, having a minimum wall thickness of 5/8" (16 mm).
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The Pass-through must be at least 18" (45.7 cm) from
combustible ceiling materials.
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It will be necessary to cut wall studs, install headers, and
construct a sill frame to maintain the proper dimensions and
to support the weight of the brick.
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The bricks must be solid brick with a minimum of 3 ½ inches
thick (nominal 4" / 102 mm).
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Refractory mortar must be used at the junction of the chimney
and the pass-through liner. The pass-through liner must not
penetrate the chimney liner beyond the inner surface of the
chimney liner. Use extreme care when constructing the hole
in the chimney liner as the tiles can shatter easily.
In Canada
The installation must conform to CAN/CSA-B365, Installation
Code for Solid Fuel Burning Appliances and Equipment. Before
proceeding be sure to consult your local building inspector.
Common Method:
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This method requires the removal of all combustible materials
from at least 18" (45.7 cm) around the chimney connector's
proposed location. A 6" round liner requires a minimum
opening 43" x 43" (109.2 x 109.2) square.
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Locate the pass-through at least 18" from combustible ceiling
materials.
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The space that is cleared of combustible materials must
remain empty. Sheet metal panels can be used to cover the
area. However, when using a panel on both sides of the wall,
each cover must be installed on noncombustible spacers at
least 1" from the wall. If one panel of sheet metal is to be used
it may be installed flush to the wall.
See section 5.3.1 and 5.3.2 of CAN/CSA - B365-M91. Consult your
local building inspector, authorized Jøtul Dealer, NFPA 211 in the
U.S. or CAN/CSA-B635 in Canada for other approved wall pass-
through methods.
USA/Canada
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