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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).
•
SLP pipe only - Frame opening 9 in. x
9 in. (229 mm x 229 mm) whenever the
vent penetrates a ceiling/floor (see Figure
8.3).
•
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!
lation around the vent. Insulation must be kept
back from the pipe to prevent overheating.
D. Install Attic Insulation Shield
WARNING! Fire Risk.
DO NOT allow loose
materials or insulation to touch vent. Hearth
& Home Technologies requires the use of an
attic shield.
The International Fuel Gas Code requires an
attic shield constructed of 26 gauge minimum
steel that extends at least 2 in. (51 mm) above
insulation.
• Attic insulation shields must meet specifi ed
clearances to combustible materials and be
secured in place.
• An attic insulation shield kit is available from
Hearth & Home Technologies. Contact your
dealer to order. Install attic insulation shield
according to instructions included with kit.
36
DO NOT pack insu-
Heatilator • Evolution • 4065-114 Rev. X • 9/15
Figure 8.3
Installing Ceiling Firestop
Ceiling firestop
installed below ceiling.
Figure 8.4 Installing the Attic Shield
ATTIC ABOVE
PIPE
DVP
SLP
Install attic insula-
tion shields before
or after installation
of vent system.
Ceiling firestop
installed above ceiling.
A
A
A
10 in. (254 mm)
9 in. (229 mm)
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