56D3049
17
V
G
G = Combustible 24"(610mm)
Noncombustible 18"(457mm)
Combustible &
Noncombustible
H = 24" (610mm)
J = 20" (508mm)
V
H
J
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)
E
V
D
C
C
V
G
Combustible =
6” (152mm)
Noncombustible =
2” (51mm)
Inside Corner
Alcove Location
Combustible =
6” (152mm)
Noncombustible =
2” (51mm)
F
V
Outside Corner
Balcony with No Side Wall
Balcony with Perpendicular
Side Wall
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
VENT INSTALLATION
TERMINATION CLEARANCES FOR BUILDINGS WITH COMBUSTIBLE
AND NONCOMBUSTIBLE ExTERIORS
Figure 13 - Allowable Venting Chart
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
1
/
2
' (2.6m).
Sidewall Vent Graph showing the relationship between vertical and
horizontal dimensions for a Direct Vent flue system.
Figure 14 - Rear Wall Venting Graph
Dimensions in
Feet
Horizontal Dimension From the Outside Face of the Wall
to the Back of the Fireplace
Vertical Dimension From the Floor of Unit to the Center of the
Horizontal V
ent Pipe
