Hearth and Home Technologies IDV4833ILH - Manual (Page 29)

Heatilator • ICON DV-IDV Series • 4042-575 • Rev K • 11/08 29
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
10 in. (254 mm)
Hole should measure
10 in. x 10 in.
(254 mm x 254 mm)
inside to inside
10 in.
(254 mm)
C. Install the Ceiling Firestop
A ceiling fi restop MUST be used between fl oors and at-
tics.
• 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 insulation around
the vent. Insulation must be kept back from the pipe to pre-
vent overheating.
Figure 8.3 Installing Ceiling Firestop
Figure 8.4 Installing the Attic Shield