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M38ODV-ST Direct Vented Fireplace
Top Vent Venting Runs
Before you install any venting, you must determine whether the venting
run will be acceptable. Unacceptable venting can affect the fireplace's
combustion.
for installations with horizontal venting runs of 0-16 feet, use the
vent graph, as described below
the maximum horizontal vent run is 16 feet.
The Venting Graph
Measure the vertical height from the fireplace hearth to the centre of
the termination and the horizontal run from the from the fireplace flue
collar to the wall flange of the termination. Plot on the Venting Graph
(Fig. 4) with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 72", and the horizontal
run to the wall flange of the vent termination is 120", this would be
an acceptable installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 66" and the horizontal
run to the wall flange of the vent termination is 30", this would be
an acceptable installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace is 48" and
the horizontal run to the wall flange of the vent termination is 84",
this would NOT be an acceptable installation.
8
Vent Rise (feet)
7
6
5
4
Height to center
3
of vent pipe.
2
1
Hearth
Figure 4. Venting Graph.
Page 6
Installation
Vent
may
terminate
in this area.
1
2
4
5
3
Installation Of Top Vent DV
A complete M38ODV-ST vent system may comprise up to six different
types of components:
A - Termination
B - Stucco Kits
C - Flex sections
D - Solid sections
E - 90° elbow
90° elbow
90° elbow
F - Offset Box
Vent may not terminate
in shaded area.
6
7
8
9 10 11 12 13 14
Vent Run (feet)
PTO-3 (3" length)
PTO-3F (3" length)
MSR (stucco frame)
MOSR (stucco can)
PFL-1 (12" section)
PFL-2 (24" section)
PFL-3 (36" section)
PFL-4 (48" section)
PEXT-1 (12" section)
PEXT-2 (24" section)
PEXT-3 (36" section)
PEXT-4 (48" section)
PEL-90
PEL-90
PEL-90
DVST-CNT
15 16
XG0128
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