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NEW CHIMNEYS
If you decide to install a new chimney, we
suggest that you attempt to locate the chimney
within the house structure. A chimney located
outside of the house structure is exposed to
cold temperatures which encourages creosote
build up and poor chimney draft.
A new chimney must meet the criteria of
Chimneys-General.
HEATER CLEARANCES
Your furnace has been tested to determine the
safe clearances to combustible material.
Combustible material includes wood stud walls,
whether they are covered with wallpaper,
paneling, gypsum board, plaster or brick. Safe
clearances are detailed in Figure 2.
Wall
Existing Furnace
Concrete Pad
Minimum Furnace Clearances to wall
and Minimum Concrete Pad Clearance
FLOOR PROTECTION
The heater must sit on a noncombustible
surface. A floor protector of a minimum of 3/8"
thick asbestos millboard or equivalent is
acceptable. The area of the floor protector
must be large enough to protect the clearances
shown in figure 2. The minimum area of a floor
protector accurately located is 38" x 52". In
addition, floor protection shall be provided
under the chimney connector (stovepipe) and 2"
to either side of the chimney connector.
Page 3
8" 17"
13"
NIPPA
8"
8"
16"
FIGURE 2
CHIMNEY CONNECTOR
The stovepipe is not a chimney. The function of
your stovepipe is to "connect" the furnace with
the chimney, hence "chimney connector". The
stovepipe you use should not be less that 7"
diameter, 24-gauge steel. We recommend
placing the furnace as close as possible to the
chimney, using the least amount of pipe and
elbows possible.
Install the stovepipe with the crimped end down
to help prevent creosote from running out onto
your furnace or floor. When attaching the
stovepipe to the furnace, use a minimum of
three sheet metal screws at each joint. This
includes the stovepipe to furnace connection.
The stovepipe's horizontal sections must rise
¼" for each foot of horizontal pipe, with the
highest point being at the chimney inlet.
If the stovepipe must pass through an interior
wall, it must be done with the use of a
ventilating thimble. The diameter of the
ventilation thimble must be at least 18" (6"
diameter pipe). See Figure 3. In the event that
you choose not to use a ventilated thimble, all
combustible material with 18" of the sides of the
stovepipe must be removed. This includes the
ceiling. See Figure 4.
Stud
Gypsum board
Vent Holes
Chimney
Connector
Metal Thimble
Thimble for passing chimney connector
(stovepipe) through walls.
(Stovepipe)
Framing
Diameter of
Chimney
Diameter
Connector
of Thimble
Partition
FIGURE 3
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