22
Heatilator • CNXT Series • 4000-011 Rev N • 11/05
C. Vertical Penetration Framing
Note:
An additional ceiling fi restop is not required if attic
insulation shield is used.
Install Attic Insulation Shield
• Frame opening for attic insulation shield.
• Attic insulation shield may be installed above or below
ceiling (see Figure 6.5).
• Secure with three fasteners on each side.
• Fold tabs at top of attic shield in toward vent pipe. Tabs
must keep vent pipe centered within shield.
• Field construct additional shield height if insulation is
deeper than height of attic shield.
Attic Above
10 in. (254 mm)
Hole should measure
10 in. x 10 in.
(254 mm x 254 mm)
inside to inside
10 in.
(254 mm)
Figure 6.4
Installing Ceiling Firestop
3 fasteners
per side
Attic insulation shield
installed below ceiling.
Attic insulation shield
installed above ceiling.
Bend tabs in
around pipe
Figure 6.5
Installing the Attic Insulation Shield
Fire Risk
Keep loose materials or blown insulation
from touching the vent pipe.
•
National building codes recommend using
attic shield to keep loose materials/blown
insulation from contacting vent.
• Hearth & Home Technologies requires
the use of an attic shield.
WARNING
Install the Ceiling Firestop
• Frame an opening 10 in. by 10 in. whenever the vent
system penetrates a ceiling/fl oor (see Figure 6.4).
• Frame the area with the same sized lumber as used in
ceiling/fl oor joist.
• When installing a top vent vertical termination appliance
the hole should be directly above the appliance, unless
the fl ue is offset.
• Do not pack insulation around the vent. Insulation must
be kept away from the pipe.
