6
NVB Series B-Vent Gas Fireplace
7412950
Clearance to Combustibles
Appliances
Top ..........................................................0” (0 mm)
Bottom .....................................................0” (0 mm)
Side .........................................................0” (0 mm)
Back ........................................................0” (0 mm)
Perpendicular Sidewall ...........................0” (0 mm)
Top of unit to ceiling ..........................36” (914 mm)
Front of unit to combustibles .............36” (914 mm)
Venting
B-Vent ...................................................1” (25 mm)
Mantels
\
The height that a combustible mantel is fitted above the
fireplace is dependent on the depth of the mantel. This
also applies to the distance between the mantel leg (if
fitted) and the fireplace.
For the correct mounting height and widths refer to
Figures 5a and 5b
The distances and reference points are not affected by
the fitting of a bay window front trim kit.
Noncombustible mantels and legs may be installed at
any height and width around the appliance.
When using paint or lacquer to finish the
mantel, such paint or lacquer must be heat
resistant to prevent discoloration.
J
F
G
H
I
Mantel
Leg
CFM164a
Mantel Leg Chart
06/22/01 sta
CFM170
DV Builder Front
View
O
N
M
L
K
Ref.
Mantel
Ref.
Mantel Leg From
Leg Depth
of Comb. Opening
F
14" (356 mm)
K
14" (356 mm)
G
12" (305 mm)
L
12" (305 mm)
H
10" (254 mm)
M
10" (254 mm)
I
8" (203 mm)
N
8" (203 mm)
J
1
¹⁄₂
" (38 mm)
O
1
¹⁄₂
" (38 mm)
Black Sur-
round Face
CFM164
CFM170
Fig. 5b
Combustible mantel leg minimum installation.
Side of
Combustion Chamber
Hearth
A hearth is not mandatory but is recommended for
aesthetic purposes. We recommend a noncombustible
hearth.
Insulating For Cold Climates
When an appliance is installed in a chase or an outside
wall, the enclosure should be insulated like any other
wall of the home. Insulation should be installed under
the appliance and on the inside of the exterior walls.
In a chase, it is a good idea to install a firestop at the
first ceiling level above the appliance. Also, install insu-
lation on the side walls. Insulation may then be placed
above the ceiling to assure the space around the appli-
ance is protected. Refer to Page 8, Figure 7.
Ref.
Mantel
Ref.
Mantel From Top
Shelf Depth
of Comb. Chamber
V
14" (356 mm)
A
18" (457 mm)
W
12" (305 mm)
B
16" (406 mm)
X
10" (254 mm)
C
14" (356 mm)
Y
8" (203 mm)
D
12" (305 mm)
Z
1
¹⁄₂
" (38 mm)
E
8" (203 mm)
CFM146
A B C D E
V
W
X
Y
Z
Fireplace
CFM146
DV Mantel Chart
7/5/01 sta
Top of Combustion
Chamber
Fig. 5a
Mantel clearances.
Side View
