Termination Clearances; How To Use A Vent Graph - Monessen Hearth MDV500, MDV600 Installation & Operating Instructions Manual

MDV Series Direct Vent Gas Fireplace

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
12" (305 mm)
*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 dimen-
sion 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 fire-
place in accordance with same.
Example A: 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 B: 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.
16
G =
Combustible
G
6" (152 mm)
Noncombustible
V
2" (51 mm)
Balcony -
with perpendicular side wall
M
V
Combustible &
Noncombustible
M = 24" (610 mm)
P = 20" (508 mm)
Outside Corner
F =
Combustible
6" (152 mm)
Noncombustible
V
2" (51 mm)
F
M
V
P
584-15
Dimensions
in Feet
34 "
from floor
to center
Horizontal Dimension From the Outside Face of the Wall
Figure 13 -
Rear Wall Venting Graph
VentIng InstallatIon
Alcove Applications*
D
C
V
E
O
E
= Min. 6" (152 mm) for
non-vinyl sidewalls
Min. 12" (305 mm) for
vinyl sidewalls
O
= 8' (2.4 m) Min.
No.
of Caps D
Min.
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.
40
38
36
34
32
30
28
26
24
22
20
18
16
14
eg: A
12
10
8
6
4
2
2 4 6 8 10 12 1 4 16 18 2 0
to the Back of the Fireplace
FP2248
sidewall vent graph
C
C
Max.
Actual
1 x D
Actual
2/3 x D
Actual
1/2 x D
Actual
Actual
75D2523