How To Use The Vent Graph - Vermont Castings Lexington LX32DV Installation And Operating Instructions Manual

VeNtING INStALLAtIoN
Termination Clearances
Termination clearances for buildings with combustible and noncombustible exteriors.
Inside Corner
Balcony -
with no side wall
Figure 12 -
Allowable
Venting
M =
Combustible &
Noncombustible
*Note: Termination in an alcove space (spaces open only on one side and with an overhang) is permitted with the dimensions specified for vinyl or
non-vinyl siding and soffits. 1. There must be a 3' (914 mm) minimum 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 termination cap must
be a minimum of 1' (305 mm) below the termination cap.

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, 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 fire-
place in accordance with same.
example: If the vertical dimension from the floor of the
fireplace is 11' (3.4 m) the horizontal run to the face of
the outer wall must not exceed 14' (4.3 m).
example: If the vertical dimension from the floor of the
unit is 7' (2.14 m), the horizontal run to the face of the
outer wall must not exceed 8Z\x' (2.6 m).
Sidewall Vent Graph showing the relationship between
vertical and horizontal dimensions for a Direct Vent flue
system.
51D0528
G =
Combustible
G
6" (152 mm)
Noncombustible
V
2" (51 mm)
Balcony -
with perpendicular side wall
M
V
12" (305 mm)
Figure 13 -
Rear Wall Venting Graph
Outside Corner
F =
Combustible
6" (152 mm)
V
Noncombustible
2" (51 mm)
F
M
V
P
Combustible &
Noncombustible
M = 12" (305 mm)
P = 6" (152 mm)
Horizontal Dimension From the Outside Face of the Wall
LX Series Direct Vent Gas Fireplace
Alcove Applications*
C
O
E
= Min. 2" (51 mm) for
non-vinyl sidewalls
Min. 12" (305 mm) for
vinyl sidewalls
O
= 8' (2.4 m) Min.
No.
of Caps D
1 3' (914 mm) 2 x D
2 6' (1.8 m)
3 9' (2.7 m)
4 12' (3.7 m)
D = # of Termination caps x 3
Min.
C = (2 / # termination caps) x D
Max.
584-15
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 12 1 4 16 18 2 0
to the Back of the Fireplace
FP2714
sidewall vent graph
D
C
V
E
C
Min. Max.
Actual
1 x D
Actual
2/3 x D
Actual
1/2 x D
Actual
Actual
eg: A
15