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35
Heat & Glo •
TRUE-36, TRUE-42, TRUE-50 • 2282-900 Rev. i •
4/13
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 8.3).
• 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 8.4.
• 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 8.3 Installing Ceiling Firestop
Figure 8.4 Installing the Attic Shield
3 FASTENERS
PER SIDE
INSTALL ATTIC INSULATION SHIELDS
BEFORE OR AFTER INSTALLATION OF VENT SYSTEM
CEILING FIRESTOP
INSTALLED BELOW CEILING
CEILING FIRESTOP
INSTALLED ABOVE CEILING
ATTIC ABOVE
A
A
PIPE
DVP
A
10 in. (254 mm)