14
20306748
MLDV Series Gas Fireplace
VENTING INSTALLATION
Figure 12 -
Allowable Venting
HOW TO USE THE VENT GRAPH
The Vent Graph should be read in conjunction with the
following vent installation instructions to determine the
relationship between the vertical and horizontal dimensions
of the vent system.
1. Determine the height of the center of the horizontal vent
pipe exiting through the outer wall. Using this dimension
on the Sidewall Vent Graph below, locate the point
intersecting with the slanted graph line.
2. From the point of this intersection, draw a vertical line
to the bottom of the graph.
3. Select the indicated dimension, and position the
fi
re-
place in accordance with same.
Example: If the vertical dimension from the
fl
oor of the
fi
replace is 11' (3.4 m) the horizontal run to the face of
the outer wall must not exceed 16' (4.9 m).
Sidewall Vent Graph showing the relationship between
vertical and horizontal dimensions for a Direct Vent
fl
ue
system.
Figure 13 -
Rear Wall Venting Graph (No Horizontal Elbows)
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
2 4 6 8 10 12 14 16 18 20
eg: A
Dimensions in Feet
Horizontal dimension from the
fi
nished outside wall to the
center of the pipe on the
fi
replace
V
ertical Dimension From the Floor of Unit to the
Center of the Horizontal V
ent Pipe
*NOTE:
Termination in an alcove space (spaces open only on one side
and with an overhang) is permitted with the dimensions speci
fi
ed for
vinyl or non-vinyl siding and sof
fi
ts. 1. There must be a 3' (914 mm) min-
imum between termination caps. 2. All mechanical air intakes within 10'
(1 m) of a termination cap must be a minimum of 3' (914 mm) below the
termination cap. 3. All gravity air intakes within 3' (914 mm) of a termina-
tion cap must be a minimum of 1' (305 mm) below the termination cap.
TERMINATION CLEARANCES
Termination clearances for buildings with combustible and non-combustible exteriors.
Outside Corner
Inside Corner
G =
Combustible
6" (152 mm)
Noncombustible
2" (51 mm)
F =
Combustible
6" (152 mm)
Noncombustible
2" (51 mm)
G
Balcony -
with no side wall
M =
Combustible &
Noncombustible
12" (305 mm)
M
Balcony -
with perpendicular side wall
M =
12" (305 mm)
P =
6” (152 mm)
M
F
Alcove Applications*
C
D
C
E
V
V
Combustible &
Noncombustible
E
= Min. 2” (51 mm) for
non-vinyl sidewalls
Min. 12” (305 mm) for
vinyl sidewalls
O
= 8’ (2.4 m) Min.
O
P
V
V
V
D
Min.
= Number of Termination caps x 3
C
Max.
= (2 / Number termination caps) x D
Actual
No. of
Caps
D
MIN
.
C
MAX
.
1
3' (914 mm) 2 x
D
ACTUAL
2
6' (1.8 m)
1 x
D
ACTUAL
3
9' (2.7 m)
2/3 x
D
ACTUAL
4
12' (3.7 m) 1/2 x
D
ACTUAL
