8
ODSR Series "A" Outdoor Woodburning Fireplace
20006811
Planning Information
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.
Moisture Resistance
This outdoor fireplace will shed moderate amounts of wa-
ter, but is not waterproof. Water and condensing water
vapor may enter the chase under certain conditions.
The fireplace will not perform as an exterior wall. Mois-
ture penetration must be considered for construction that
places the fireplace in structure walls or on moisture sen-
sitive surfaces.
When installed on exterior walls: Vermont Castings
Group recommends the fireplace chase be constructed
outside the structure's weather envelope. Where the plat-
form meets the wall, use a flashing detail similar to that
required for attached decks. Chase platforms, including
hearths should slope away from the structure at 1/4 in per
foot. The fireplace can be shimmed level.
When installed on surfaces where water may collect or
cause damage: Vermont Castings Group recommends a
slope of 1/8 in to 1/4 in per foot towards the drain port sug-
gested. The fireplace can be shimmed level.
Hearths should slope away from the front of the fireplace
and chase at 1/8 in to 1/4 in per foot. Metal safety strips
must be on top of any combustible hearth materials used
for moisture management.
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 21, Fig. 21)
Planning the Chimney Run
Determine how the chimney will be run, length of run and
chimney components required to complete the job. (Fig. 8)
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.
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. 9)
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'
(614 mm) in height above the highest point where it
passes through the roof.
L1
L1
LT
MODEL SK
2 WALL CHIMNEY
TOTAL
LENGTH
(LT)
INSTALLED
LENGTH
(L1)
SK81
SK818
SK83
SK84
11
56O
"
17
56O
"
35
56O
"
47
56O
"
10
56O
"
16
56O
"
34
56O
"
46
56O
"
FP288
MBUF-INSTALLED LENGTH
6/17/96
Fig. 8
Installed lengths of chimney sections.
WF288
