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Preplanning an installation is very important to ensure
safety and to save time and money. An installer must
predetermine where a fireplace will be set and how the
chimney system will be run.
Mounting the Fireplace
A fireplace may only be mounted on the following sur-
faces:
1. A flat combustible surface.
2. A raised wooden platform.
3. A concrete block or other solid object placed beneath
each of the four (4) corners of the fireplace.
The fireplace must be spaced 1/2" (13 mm) from a com-
bustible back wall and 1/2" (13 mm) from a combustible
side wall or support. (Page 14, Fig. 20)
Planning the Chimney Run
L T
MODEL SK
2 WALL CHIMNEY
L 1
SK81
SK818
SK83
L 1
SK84
Fig. 7 Installed lengths of chimney sections.
Determine how the chimney will be run, length of run and
chimney components required to complete the job. (Fig. 6)
Never install a chimney below minimum heights.
In planning a chimney system, it is important to know:
1. The height of a chimney is measured from the hearth
to the exit point on the termination.
2. A chimney cannot be offset more than 30° from a vertical
plane.
3. A chimney may run straight up or it may be necessary
to offset it to avoid obstructions.
4. The maximum length of an angled run (total chimney
system) is 20' (6 m).
5. No more than 2 offsets (4 total 30° elbows in U.S./or
2 total 45° elbows in Canada) per fireplace may be
used.
6. A guy wire stabilizer is required for chimneys extending
more than 6' (1.8 m) above a roof line.
7412944
Planning Information
TOTAL
INSTALLED
LENGTH
LENGTH
(L 1 )
(L T )
"
"
"
"
"
"
"
"
FP288
FP288
MBUF-INSTALLED LENGTH
6/17/96
BR/BC Series Woodburning Fireplaces
The Ten Foot Rule
Major U.S. building codes specify a minimum chimney
height above the roof top. The "Ten Foot Rule" is a fire
safety rule and not a draft rule. To ensure proper draft, it
is recommended that you always meet or exceed the "Ten
Foot Rule," especially when installing a termination on a
high pitch roof. (Fig. 8)
The key points of the "Ten Foot Rule" are:
1. If the horizontal distance from the chimney to the peak of
the roof is 10' (3 m) or less, the top of the chimney must
be at least 2' (610 mm) above the peak of the roof, but
never less than 3' (914 mm) in height above the highest
point where it passes through the roof.
2. If a horizontal distance from the chimney to the peak of
the roof is more than 10' (3 m), a chimney height refer-
ence point is established on the surface of the roof a
distance of 10' (3 m) from the chimney in a horizontal
plane. The top of the chimney must be at least 2' (610
mm) above the reference point, but never less than 3'
(914 mm) in height above the highest point where it
passes through the roof.
0 To 10'
2' Min.
3'
Min.
Reference
Point
Fig. 8 Ten Foot Rule illustration.
AC246
4/1/96
0 To 10'
2' Min.
3'
Min.
AC246
7
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