Heatilator • Novus NBV • 4055-188 Rev C • 04/08
15
A. Pipe Clearances to Combustibles
Fire Risk
Explosion Risk
Maintain vent clearance to combustibles as
speci
fi
ed.
• Do not pack air space with insulation or
other materials.
• National building codes recommend
using attic shield to keep loose materials/
insulation from contacting vent.
Failure to keep insulation or other materials
away from vent pipe may cause
fi
re.
WARNING
Do not pack with insulation
or other materials.
Use manufacturer's
installation instructions for
framing dimensions
Figure 6.1 Exterior Wall Hole
6
6
Vent Clearances and Framing
B. Wall Penetration Framing
Follow vent pipe manufacturer’s instructions for all clear-
ances around pipe.
For a wall penetration consult B-vent pipe manufacturer’s
instructions. Use same dimensional framing materials as
those used in the wall construction.
Note:
MUST terminate vertically.
C. Vertical Penetration Framing
Use B-vent manufacturer’s
fi
restops to provide adequate
clearances.
Fire Risk
Keep loose materials or blown insulation
from touching the vent pipe.
• National building codes recommend
using attic shield to keep loose materials/
insulation from contacting vent.
• Hearth & Home Technologies requires
the use of an attic shield.
WARNING
