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Heatilator • Eclipse • 4049-229 Rev F • 11/08 31
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
9 in. (229 mm)
Hole should measure
9 in. x 9 in.
(229 mm x 229 mm)
inside to inside
9 in.
(229 mm)
C. Install the Ceiling Firestop
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/floor (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
insulation around the vent. Insulation must be
kept back from the pipe to prevent overheat-
ing.
Figure 8.3 Installing Ceiling Firestop
Figure 8.4 Installing the Attic Shield