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5 5
Vent Clearances and Framing
A. Pipe Clearances to Combustibles
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 overheating and fi re.
Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38 mm).
DVP heat shield - designed to be used on a wall 4 in. to 7-1/4 in.
(102 mm to 184 mm) thick.
HSM-B will be required.
3 in. (76 mm)
top clearance
1 in. (25 mm)
clearance around
vertical sections
Figure 5.1 Horizontal Venting Clearances To Combustible
Materials
Heat
3 in. (76 mm)
Shield
top clearance *
1 in. (25 mm)
clearance
Wall
bottom & sides
Shield
Firestop
WALL
Heat & Glo • RED60 Installation Manual • 2159-980 Rev. D • 11/13
B. Wall Penetration Framing
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.
• DVP pipe - A wall shield fi restop must be placed on
each side of an interior wall. A minimum 1-1/2 in. (38
mm) overlap of attached heat shields must be main-
tained.
-
• See Section 7.F for information for regarding the instal-
lation of a horizontal termination cap.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by noncom-
bustible materials such as concrete, a hole with diameter
one inch greater than the pipe is acceptable.
Whenever a non-combustible wall is penetrated, the wall
shield fi restop is only required on one side and no heat
shield is necessary.
10 in.
A
* Shows center of vent framing hole for top venting. The center of the hole
is one (1) in. (25.4 mm) above the center of the horizontal vent pipe.
Figure 5.2 Wall Penetration
DO NOT PACK WITH
INSULATION OR
OTHER MATERIAL
12 in.
B
A*
B
75-7/8 in.
74-7/8 in.
39
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