Heatilator • Caliber CD Series • 4040-263 Rev M • 06/08
34
3 fasteners
per side
Ceiling firestop
installed below ceiling.
Ceiling firestop
installed above ceiling.
Install attic insula-
tion shields before
or after installation
of vent system.
ATTIC ABOVE
A
PIPE
DVP
SLP
A
10 in. (254 mm)
9 in. (229 mm)
A
C. Install the Ceiling Firestop
A ceiling
fi
restop
MUST
be used between
fl
oors and attics.
•
DVP pipe only
- Frame an opening 10 in.
by 10 in. (254 mm by 254 mm) whenever
the vent penetrates a ceiling/
fl
oor (see
Figure 8.4).
•
SLP pipe only
- Frame opening 9 in. x
9 in. (229 mm x 229 mm) whenever the
vent penetrates a ceiling/floor (see Figure
8.4).
• Frame the area with the same sized lumber
as used in ceiling/
fl
oor joist.
• The
ceiling
fi
restop may be installed above
or below the ceiling joists when installed
with a attic insulation shield. It must be
under joists between
fl
oors that are not
insulated. Refer to Figure 8.5.
• Secure with three fasteners on each side.
WARNING! Risk of Fire! DO NOT pack insu-
lation around the vent. Insulation must be kept
back from the pipe to prevent overheating.
Figure 8.4 Installing Ceiling Firestop
Figure 8.5 Installing the Attic Shield
