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TERMINATION CLEARANCES FOR BUILDINGS WITH COMBUSTIBLE
AND NONCOMBUSTIBLE ExTERIORS
Combustible =
G
6" (152mm)
V
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 A: 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 B: 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.
56D3049
V
F
Outside Corner
H
V
J
Combustible &
Noncombustible
H = 24" (610mm)
J = 20" (508mm)
Balcony with Perpendicular
Side Wall
Figure 13 - Allowable Venting Chart
1
/
' (2.6m).
2
Combustible =
6" (152mm)
Noncombustible =
2" (51mm)
C = Maximum depth of 48" (1219mm)
D = Minimum width for back wall of
E = Clearance from corner in alcove
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
Horizontal Dimension From the Outside Face of the Wall
Figure 14 - Rear Wall Venting Graph
VENT INSTALLATION
D
C
V
E
for alcove location
alcove location
Combustible - 38" (965mm)
Noncombustible - 24" (610mm)
location
Combustible - 6" (152mm)
Noncombustible - 2" (51mm)
Alcove Location
Dimensions in
Feet
eg: A
to the Back of the Fireplace
17
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