Heat & Glo • Cyclone-BN, Cyclone-BC • 2073-900 Rev. N • 10/08
18
C. Vertical Penetration Framing
Figure 6.3
Figure 6.4 Installing the Attic Shield
ATTIC ABOVE
A
PIPE
SLP
A
9 in. (229 mm)
A
A ceiling fi restop
MUST
be used between
fl oors and attics.
• Frame opening 9 in. x 9 in. (229 mm x 229
mm) whenever the vent penetrates a ceiling/
fl oor (see Figure 6.3).
• 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 6.4.
• 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.
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
