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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 firestops
• Between wall shield firestops
• Around vent system
Failure to keep insulation or other material away from
vent pipe may cause overheating and fire.
Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38 mm).
• If wall thickness is less than 4 in. the existing heat shields must be field trimmed. If
wall thickness is greater than 7-1/4 in. a DVP-HSM-B will be required.
• 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.
Heat
Shield
3 in. (76 mm)
top clearance
1 in. (25 mm)
clearance around
vertical sections
Wall
Shield
Firestop
Heat
Shield
* When using SLP pipe, minimum clearances from the vent pipe to combustible
materials at inside wall firestops are:
Figure 5.1
Horizontal Venting Clearances To Combustible
Materials
24
Heat & Glo • TIARAP-BK-IPI, TIARAP-BR-IPI, TIARAP-CES-IPI Installation Manual • 2344-980_R4 • 11/14
(SLP Pipe Shown)
3 in. (76 mm)
top clearance *
Heat
Shield
1 in. (25 mm)
clearance
bottom & sides
WALL
3 in. (76 mm)
top clearance *
Heat
Shield
1 in. (25 mm)
Wall
clearance
Shield
bottom & sides
Firestop
WALL
Top: 2-1/2 in. (64 mm)
Bottom: 1/2 in. (13 mm)
Sides: 1 in. (25 mm)
B. wall Penetration Framing/Firestops
Combustible wall Penetration
whenever a combustible wall is penetrated, you must
frame a hole for the wall shield firestop(s). the wall shield
firestop maintains minimum clearances and prevents cold
air infiltration.
• 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 firestop 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 7.F. for information for regarding the
installation of a horizontal termination cap.
Non-Combustible wall Penetration
If the hole being penetrated is surrounded by non-
combustible 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 firestop is only required on one side and no heat
shield is necessary.
10 in.
10 in.
A
B
A
Inches
52-1/4
mm
1327
Figure 5.2 wall Penetration
C
10 in.
D
MEASURED
FROM FLOOR
10 in.
B
C
D
16-1/4
52-1/4
16-1/4
413
1327
413
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