Chimney Requirements - Jøtul F 602 CB V2 Installation Planning Manual

Chimney
Requirements
Masonry Chimneys
A masonry chimney should conform to
the following guidelines:
• The chimney must have a fireclay
liner or equivalent, with a minimum
thickness of 5/8" and must be installed
with refractory mortar. There must be
at least 1/4" air space between the flue
liner and the chimney wall.
• The chimney flue size should not be
less than the cross-sectional area of
the stove flue collar.
The cross-sectional area of the flue
of a chimney with no walls exposed
to the outside below the roofline shall
not be more than three times the
cross-sectional area of the stove flue
collar.
The cross-sectional area of the flue
of a chimney with one or more walls
exposed to the outside below the
roofline shall not be more than two
times the cross-sectional area of the
stove flue collar.
Larger chimney flues should be relined
with a listed or code-approved liner.
• Brick or modular block must be a
minimum 4" nominal thickness. Stone
construction must be at least 12" thick.
* A newly-built chimney must conform
to local codes, or, in that absence, must
comply with national regulations.
• No other appliance may be connected
to the same flue.
• An airtight clean-out door should be
located at the base of the chimney.
Prefabricated
Chimneys
Prefabricated metal chimneys offer an
alternative when masonry construction
may not be practical. Use only a High
Temperature (HT) chimney system
tested and listed for use with solid
fuel-burning appliances. Follow the
manufacturer's installation instructions
exactly and confirm that clearances
are maintained as specified by the
manufacturer.
6
Chimney Height
Whether masonry or prefabricated
steel, any chimney must be at least
3 feet higher than the highest point
where it passes through the roof
and at least 2 feet higher than the
highest part of the roof or structure
that is within 10 feet of the chimney,
measured horizontally. See figure 1.
Chimneys shorter than 14 feet
may not provide adequate draft and
can result in smoke spillage when
loading the stove. Poor draft can
also cause back-puffing (ignition
of gas buildup in the firebox)
and sluggish performance. The
minimum chimney height does
not, in itself, guarantee satisfactory
chimney performance.
Excessive chimney height
can promote overly strong draft
resulting in high stove temperatures
and short burn times.
Avoid locating the chimney
close to building structures, trees,
or other environmental objects that
may interfere with draft stability or
cause nuisance to neighbors.
Your Jøtul dealer is your best
resource for information regarding
draft issues and how best to
avoid other performance related
problems.
2 ft.
3 ft.
10 ft.
Figure 1. The 3' / 2' / 10' Chimney Rule.
Chimney Connection
Single wall steel stovepipe having
a minimum 24 gauge thickness is
suitable for connecting your heater
to a masonry or prefabricated
factory-built chimney flue. Always
assemble the sections keeping the
crimped ends pointing toward the
stove. Secure each joint with three
sheet metal screws. Clearance to
adjacent combustible surfaces
must be maintained. See the
individual product clearance charts
for these specifications.
Use double-wall, air insulated
pipe for runs exceeding 10 ft. Any
horizontal chimney connection run
must include 1/4" rise per foot and
should not exceed 3 ft.
Double-wall pipe can be used
to achieve reduced clearance to
adjacent combustible surfaces with
or without additional shielding.
Toward
Stove
Direction
Figure 2. Assemble chimney connection
sections crimped end toward stove.
Flue Gas