Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15
42
B. Mantel and Wall Projections
WARNING! Risk of Fire!
Comply with all minimum clear-
ances to combustibles as speci
fi
ed. Framing or
fi
nishing ma-
terial closer than the minimums listed must be constructed
entirely of non-combustible materials (i.e., steel studs, con-
crete board, etc).
1 in. (25 mm) min.
to perpendicular wall
A
3-1/2 in. (89 mm) min.
from fireplace opening
to perpendicular wall
B
Mantel Leg or
Perpendicular Wall
Top of
Appliance
Drywall
A
B
Measured from top of hood (in inches)
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
5
5-1/2
6-1/4
7
7-3/4
8-1/2
9-1/4
10
10-3/4
11-1/2
12-1/4
13
13-3/4
14-1/2
15-1/4
16
30 in. minimum
to ceiling
Figure 10.2 Minimum Vertical and Maximum Horizontal Dimensions
Note:
All
measurements
in inches
.
Figure 10.3 Mantel Leg or Wall Projections (Acceptable on both sides of opening)
Mantels
Mantel Legs or Wall Projections
