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Heat & Glo • Soho24B • 2137-900 Rev. P • 8/12
16
Figure 6.2 Exterior Wall Hole
A*
B
10 in.
10 in.
* Shows center of vent framing hole for top venting. The center of the hole
is one (1) inch (25.4 mm) above the center of the horizontal vent pipe.
A. Pipe Clearances to Combustibles
Fire Risk.
Explosion Risk.
Maintain vent clearance to combustibles as
specifi ed.
• Do not pack air space with insulation or other
materials.
Failure to keep insulation or other materials
away from vent pipe may cause fi re.
WARNING
A* B
38 in. 37 in.
6
6
Vent Clearances and Framing
Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38 mm).
• SLP heat shield - designed to be used on a wall 4-3/8 in. to 7-5/8
in. (111 mm to 194 mm thick).
• If wall thickness is less than 4-3/8 the existing heat shields must be
field trimmed. If wall thickness is greater than 7-5/8 in. a DVP-
HSM-B will be required.
2-1/2 in. (64 mm)
top clearance at
wall shield firestops
1/2 in. (13 mm) bottom
clearance at wall
shield firestops
1 in. (25 mm)
clearance
bottom and sides
Heat
Shields
Wall
Shield
Firestop
WALL
3 in. (76 mm)
top clearance
1 in. (25 mm)
clearance around
vertical sections
Figure 6.1 Horizontal venting clearances to combustible
materials
B. Wall Penetration Framing
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must
frame a hole for the wall shield fi restop. 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.
• SLP 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 maintained.
• See Section 8.L. 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 in. 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.