Prefabricated Chimneys; Chimney Height; Wall Pass-Throughs - Jøtul F 118 CB Installation And Operating Instructions Manual

USA/Canada
• Brick or modular block must be a minimum of
4" (10 cm) nominal thickness. Stone construction must
be at least 12" (30 cm) thick.
• A newly-built chimney must conform to local codes,
or, in their absence, must comply with national
regulations.
• 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. Any
repairs must be completed before installing the stove.
• No other appliance may be vented into the same flue.
• 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.
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. Optimum draft force should be in
the .05 - .10 psi range measured by a Magnahelic gauge.
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.
8
3'
91.5 cm
Figure 7. Chimney Height Requirement.

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 fig. 7. Remove all combustible materials from 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.
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).
The Pass-through must be at least 18" (45.7 cm) from
combustible ceiling materials.
Wood Stud 2"
Clearance to
Chimney
Header
12"
Pass through 30.5 cm
construction: 12"
Brick from thimble
to combustibles
Thimble: 5/8"
Fireclay Liner or
equivalent
Sill/Support
Figure 8. Masonry Wall Pass-through.
2'
61 cm
10'
305 cm
Flue Liner
12"