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F. Install Attic Insulation Shield
WARNING! Risk of Fire!
lation shield when there is any possibility of insulation or
other combustible material coming into contact with the
chimney.
• DO NOT pack insulation between the chimney and the
attic insulation shield.
• Failure to keep insulation and other materials away from
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• Combustible material may come in contact with the attic
insulation shield as long as the required clearances are
maintained to the chimney pipe.
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ronmental conditions is not recommended.
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Double-check the Chimney Assembly
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You MUST install an attic insu-
Use of cardboard or other
Heatilator • ST42A Installation Manual • 4012-051 • Rev O • 02/22
Pre-bend the tabs to
rest against pipe to
prevent insulation
from falling in.
Figure 5.5 Prepare Attic Insulation Shield
2 in. (51 mm)
air space
5 Tabs bent
Insulation
10-1/2 in.
(267 mm)
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2 in. (51 mm)
air space
5 Tabs bent
Insulation
10-1/2 in.
(267 mm)
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Insert three
screws
(5)Tabs bent
in 90°
Tabs bent in to
rest against pipe
Pipe
Attic Insulation Shield
14-1/2 in. (368 mm)
diameter
in 90°
Ceiling Firestop
Pipe
Insulation
Seal with tape
Tabs bent in to
rest against pipe
Pipe
Attic Insulation Shield
14-1/2 in. (368 mm)
diameter
in 90°
Insulation
Ceiling Firestop
Pipe
Seal with tape
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