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Heat & Glo • RED40, RED40ST • 2155-900 Rev. o • 7/1232
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 over heating and fi re.
8
8
Vent Clearances and Framing
Figure 8.2 Wall Penetration
* 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.
A * B
59-3/4 in. 58-3/4 in.
1.52 m 1.49 m
A
10 in.
12 in.
B
DO NOT PACK WITH
INSULATION OR
OTHER MATERIAL
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 10.K. for information for regarding the in-
stallation 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.
Figure 8.1 Horizontal Venting Clearances To Combustible
Materials
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.
,f wall thickness is less than 4 in. the e[isting heat shields must be
field trimmed. ,f wall thickness is greater than 7-1/4 in. a '93-
HSM-B will be required.
(DVP Pipe Shown)
3 in. (76 mm)
top clearance *
1 in. (25 mm)
clearance
bottom & sides
Heat
Shield
Wall
Shield
Firestop
Heat
Shield
WALL
3 in. (76 mm)
top clearance
1 in. (25 mm)
clearance around
vertical sections