Install The Ceiling Firestop - Heatilator ND3933 Owner's Manual

C. 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.
• The ceiling fi restop may be installed above or below the
ceiling. Refer to Figure 6.5.
• Secure with three fasteners on each side.
• Do not pack insulation around the vent. Insulation must
be kept away from the pipe.
Heatilator • Novus DV • 4031-550 Rev G • 11/07
Figure 6.4 Installing Ceiling Firestop
Install attic insula-
tion shields before
or after installation
of vent system.
3 fasteners
per side
Ceiling firestop
installed below ceiling.
Figure 6.5 Installing Ceiling Firestop & Attic Insulation Shield
Attic Above
10 in. (254 mm)
10 in.
(254 mm)
Hole should measure
10 in. x 10 in.
(254 mm x 254 mm)
inside to inside
Ceiling firestop
installed above ceiling.
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