1. Minimum Clearances
Position combustible/
non-combustible mantel:
see table above.
12 in.
(305 mm)
43-7/8 in.
(1114 mm)
24 in.
(610 mm)
2 in.
(51 mm)
48-1/4 in.
(1226 mm)
42-1/4 in.
(1073 mm)
The finished cavity depth must
be no less than 24 in. (610 mm)
from the finished backwall to
the outside of front wall framing.
Figure 3.3 Framing the Fireplace
WITHIN ENCLOSURE AREA
Fireplace to backwall
1/2 in. (13 mm)
Fireplace to sidewall
1 in. (25 mm)
Duct boots to framing
0 in. (0 mm)
Top standoffs to header
0 in. (0 mm)
Door opening to sidewall
22-7.8 in. (581 mm)
EXPOSED SURFACES
Faceplate to sidewall
16 in. (406 mm)
Heat zone air grills to ceiling 12 in. (305 mm)
MANTEL
Non-combustible mantel
(Non-combustible framing
materials above the fireplace
to ceiling)
46 in. (1168 mm)
Combustible mantel
(Combustible framing
materials above the fireplace
to ceiling)
60 in. (1524 mm)
Maximum mantel depth
12 in. (305 mm)
12
Heat & Glo • NORTHSTAR • 480-2360 Installation Manual • Rev H • 8/20/14
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