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VENT INSTALLATION
TERMINATION CLEARANCES FOR BUILDINGS WITH COMBUSTIBLE
AND NONCOMBUSTIBLE ExTERIORS
G
G=6" (152mm)
V
Combustible – 6" (152 mm)
Noncombustible – 2" (51mm)
Inside Corner
G
V
G = Combustible 24"(610mm)
Noncombustible 18"(457mm)
Balcony with No Side Wall
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 fireplace in
accordance with same.
Example: If the vertical dimension from the floor of the
fireplace is 11' (3.4m) the horizontal run to the face of the
outer wall must not exceed 14' (4.3m).
Example: If the vertical dimension from the floor of the unit
is 7' (2.14m), the horizontal run to the face of the outer
wall must not exceed 8
Sidewall Vent Graph showing the relationship between vertical and
horizontal dimensions for a Direct Vent flue system.
16
V
Outside Corner
H
Combustible &
Noncombustible
H = 24" (610mm)
J = 20" (508mm)
Balcony with Perpendicular
Figure 9 - Allowable Venting Chart
1
/
' (2.6m).
2
F
F=6" (152mm)
V
J
Side Wall
57" from
floor
to center
Horizontal dimension from the finished outside wall
D
V
C = Maximum depth of 48" (1219mm)
for alcove location
D = Minimum width for back wall of
alcove location
Combustible - 38" (965mm)
Noncombustible - 24" (610mm)
E = Clearance from corner in alcove
location
Combustible - 6" (152mm)
Noncombustible - 2" (51mm)
Alcove Location
40
38
36
Dimensions in
34
Feet
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
2 4 6 8 10 1214 16 1820
to the center of the pipe on the fireplace
Figure 10 - Rear Wall Venting Graph
C
E
eg: A
74D0010
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