20
Heatilator • Eclipse • 4049-300 Rev H • 11/07
WA
LL
No combustible
framing to be
located within
shaded area.
2 x 4 or
2 x 6
header
Drywall
3 in.
(76 mm)
1 in. (25 mm)
3/4 in. (19 mm)
minimum to
perpendicular
wall.
Air space clearance to
bottom and sides of
horizontal pipe must be
at least 1 in. (25 mm)
B. Wall Penetration Framing
• Wherever a combustible wall is penetrated, the hole must
be framed with a wall shield
fi
restop. This shield maintains
minimum clearances and restricts cold air in
fi
ltration.
• If the wall being penetrated is of noncombustible materials
(material which will not ignite or burn, or has a UL
fi
re rating
of zero), a 8 in. (203 mm) diameter hole is acceptable.
• Whenever a wall is penetrated the wall shield
fi
restop
is only required on one side and no heat shield is
necessary.
• If your local inspector requires the wall shield
fi
restop on
both sides of the wall, then both wall shield
fi
restops must
have a heat shield attached to them.
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.
Failure to keep insulation or other materials
away from vent pipe may cause
fi
re.
WARNING
Figure 6.1 Minimum Top Vent Pipe Clearances
Heat Shield
Wall Shield
Firestop
(Interior)
Trim heat shield if
too long. Add to
shield if too short.
Figure 6.2 Heat Shield
Framing should be
constructed of 2 X 4
lumber or heavier.
The center of the
framing hole is
1 in. [25mm] above
the center of the
horizontal vent pipe.
Vent
framing
hole
36-1/2 in. [927 mm]
(Center of pipe)
10 in.
[254mm]
10 in.
[254mm]
Figure 6.3 Exterior Wall Hole
6
6
Vent Clearances and Framing
¨
