Heatilator • RAVE32-IFT-B, RAVE36-IFT-B, RAVE42-IFT-B Installation Manual • 2619-983 Rev. U • 9/22
38
A. Vent 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 could cause overheating and fire.
5
5
Vent Clearances and Vent Framing
Figure 5.2 Wall Penetration
Figure 5.1 Horizontal Venting Clearances To Combustible
Materials
* When using SLP pipe, minimum clearances from the vent pipe to combustible materi-
als at inside wall firestops are:
Top: 2-1/2 in. (64 mm)
Bottom: 1/2 in. (13 mm)
Sides: 1 in. (25 mm)
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)
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
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 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 firestop is only required on one side and no heat
shield is necessary.
DO NOT PACK VENT FRAMING HOLE WITH INSULATION
OR OTHER MATERIAL.
Note:
Center of the horizontal vent pipe to the vertical measuring
surface of a trap cap is 5 inches (127 mm).
* 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.
A*
B
RAVE32-IFT-B
41-1/2 in.
40-1/2 in.
1054 mm
1029 mm
RAVE36-IFT-B
47-1/2
46-1/2
1207
1181
RAVE42-IFT-B
47-1/2
46-1/2
1207
1181
A
10 in.
10 in.
B
RAVE36-IFT-B Shown
