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B. Mantel and Wall Projections
WARNING! Risk of Fire! Comply with all minimum clear-
ances as specifi ed. Framing closer than the minimums list-
ed must be constructed entirely of non-combustible materi-
als (i.e., steel studs, concrete board, etc.).
Note: Mantel measurement is taken from top of
the opening, NOT the top of the fi replace.
Combustible Mantels
Note: All
measurements
in inches.
9
8
7
9-1/4
6
8-1/2
5
7-3/4
4
7
3
6-1/4
5-1/2
5
Measured from top of hood or appliance opening (in inches).
Refer to Section 3.B for additional clearances to combustibles information.
Figure 11.2
Minimum Vertical and Maximum Horizontal
Dimensions of Combustibles
Combustible or Non-Combustible Mantel Legs or
Wall Projections
Top of
Appliance
FIREPLACE OPENING
See Dimension B on Appliance
Dimension Diagram.
A
B
Figure 11.3 Combustible Mantel Leg or Wall Projections
(Acceptable on both sides of opening)
30
Heatilator • NBV3630I-B, NBV3933I-B, NBV4236I-B, NBV4842I-B Installation Manual • 2376-980 Rev. F • 7/16
30 in. minimum
to ceiling
18
17
16
16
15
15-1/4
14
14-1/2
13
13-3/4
12
13
11
12-1/4
10
11-1/2
10-3/4
10
Drywall
A
B
Mantel Leg or
Perpendicular Wall
1 in. (25 mm) min.
to perpendicular wall
3-1/2 in. (89 mm) min.
from fireplace opening
to perpendicular wall
C. Decorative
Front
Finishing
Only decorative fronts certifi ed for use with this appliance
model may be used. Contact your dealer for a list of dec-
orative fronts that may be used. The fi nishing material
thicknesses allowed are noted below.
DECORATIVE FRONT
NON-COMBUSTIBLE
FINISHING MATERIAL
4 IN. MAXIMUM THICKNESS
Stop fi nishing material fl ush with appliance opening.
Figure 11.4 Non-Combustible Finishing Material
DECORATIVE FRONT
COMBUSTIBLE
FINISHING MATERIAL
1 IN. MAXIMUM THICKNESS
Stop fi nishing material fl ush with appliance surround opening.
Figure 11.5 Combustible Finishing Material
Dimensions
for
NON-COMBUSTIBLE
FINISHING MATERIAL
4 IN. MAXIMUM THICKNESS
COMBUSTIBLE
FINISHING MATERIAL
1 IN. MAXIMUM THICKNESS
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