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USA/Canada
Chimney Height
The minimum chimney height for the F 3 CB is 15 feet.
Whether a masonry chimney or prefabricated metal
chimney is used it must rise 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 6.
Fig. 6
At least 3 feet
Chimneys shorter than 15 feet may not provide adequate
f i r e - p a r t s . c o m
draft. This could result is smoke spilling into the room from
the stove when loading the stove, or when the door is open.
In addition, inadequate draft can cause back puffing, which
is a build up of gases inside the firebox.
Other times, chimney height can create excessive draft
which can cause high stove temperatures and short burn
times. Excessive drafts can be corrected by installing a
butterfly damper. If you suspect you have a draft problem,
consult your dealer.
Wall pass-throughs
When your installation unavoidably requires the chimney
connector to pass through a combustible wall to reach the
chimney, always consult your local building officials, and be
sure any materials to be used have been tested and listed
for 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
When passing through a combustible wall to a masonry
chimney this method requires the removal of all
At least 3 feet
10 feet
combustible materials from at least 12" around the
chimney connectors proposed location. With a 6" round
liner the minimum area required would be 31" x 31" square.
The space is then filled with at least 12" of brick around a
fireclay liner. Remember, the liner must be ASTM C35 or
equivalent, with a minimum wall thickness of 5/8".
It is important to remember to locate the pass-through
at least 18" from the ceiling for proper clearance to
combustibles.
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.
The bricks must be solid brick with a minimum of 3 1/2"
thick (4" nominal).
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, the tiles can
shatter easily. See figure 7.
Fig. 7
Wood Stud 2"
Clearance to
Chimney
Header
12"
30.5 cm
Pass through
construction:
12" Brick from
thimble to
combustibles
Thimble: 5/8"
Fireclay Liner or
equivalent
Sill / Support
In Canada
In Canada the standard has been established by the
canadian standard association. 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.
Flue Liner
7
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