Vent Clearances And Vent Framing; Vent Clearances To Combustibles; Wall Penetration Framing/Firestops - Heat & Glo COSMO32-IFT-B Installation Manual

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Vent Clearances and Vent Framing

A. Vent 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 could 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.
• 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.
(DVP-SLP Pipe Shown)
Heat
Shield
3 in. (76 mm)
top clearance
1 in. (25 mm)
clearance around
vertical sections
* When using SLP pipe, minimum clearances from the vent pipe to combustible materi-
als at inside wall firestops are:
Figure 5.1 Horizontal Venting Clearances To
Combustible Materials
Heat & Glo • COSMO32-IFT-B, COSMO36-IFT-B, COSMO42-IFT-B Installation Manual • 2619-980 Rev. G • 7/20
38
3 in. (76 mm)
top clearance *
Heat
Shield
1 in. (25 mm)
clearance
Wall
bottom & sides
Shield
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 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.
• 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 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 non-com-
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.
DO NOT PACK VENT FRAMING HOLE WITH INSULATION
OR OTHER MATERIAL.
10 in.
10 in.
A
COSMO32-IFT-B
COSMO36-IFT-B
COSMO42-IFT-B
* Shows center of vent framing hole for top venting. The center of the
hole is 1 in. (25 mm) above the center of the horizontal vent pipe.
Note: Center of the horizontal vent pipe to the vertical measuring
surface of a trap cap is 5 inches (127 mm)
Figure 5.2 Wall Penetration
B
COSMO36-IFT-B Shown
A* B
41-1/2 in. 40-1/2 in.
1054 mm 1029 mm
47-1/2 46-1/2
1207 1181
47-1/2 46-1/2
1207 1181