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Heat & Glo • LUX60 • 4062-116 • Rev. G • 4/11 31
No combustible
framing to be
located within
shaded area.
1-1/2 in. (13 mm)
minimum to
perpendicular
wall.
WALL
Cement
Board
3 in.
(76 mm)
Steel Stud
Assembly
Air space clearance to
bottom and sides of
horizontal pipe must be
at least 1 in. (25 mm)
12 in.
(305 mm)
6 in.
(152 mm)
10 in.
(254 mm)
Vent Framing Hole
102 1/2 in.
(2604 mm)
from center of
pipe to bottom
of appliance
Framing should be
constructed of
2x4 lumber.
The center of the
framing hole is
1 in. (25 mm) above
the center of horizontal
vent pipe.
A. Pipe Clearances to Combustibles
Refer to Fiture 8.1.
WARNING! Risk of Fire! Maintain air space clearance to
vent. DO NOT pack insulation or other combustibles:
• Between ceiling fi restops
• Between wall shield fi restops
• Around vent system
Failure to keep insulation or other material away from
vent pipe may cause over heating and fi re.
8
8
Vent Clearances and Framing
B. Wall Penetration Framing
Refer to Figure 8.2.
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must
frame a hole for the wall shield fi restop(s). The wall shield
fi restop maintains minimum clearances and prevents cold
air infi ltration.
• The opening must be framed on all four sides using the
same size framing materials as those used in the wall
construction.
• A wall shield fi restop is required on one side only on
interior walls. If your local inspector requires a wall shield
fi restop on both sides, then both wall shield fi restops
must have a heat shield attached to them.
• See Section 10.I. for information for regarding the
installation of a horizontal termination cap.
Figure 8.2 Wall Penetration
Figure 8.1 Horizontal Venting Clearances To Combustible Materi-
als
Noncombustible Wall Penetration
If the hole being penetrated is surrounded by noncombus-
tible materials such as concrete, a hole with diameter one
inch greater than the pipe is acceptable.
Whenever a noncombustible wall is penetrated, the wall
shield fi restop is only required on one side and no heat
shield is necessary.