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Heatilator • CRAVE4836-C/ST-C, CRAVE6048-C/ST-C, CRAVE7260-C/ST-C, CRAVE8472-C/ST-C Installation Manual • 2601-980 Rev. N • 11/21
42
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 5.1 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
.
• 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.
(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