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Heatilator • Novus NDV Series • 4055-187 Rev F • 06/08 35
D. Install Attic Insulation Shield
WARNING! Fire Risk. DO NOT allow loose materials or
insulation to touch vent. Hearth & Home Technologies Inc.
requires the use of an attic shield.
The National Fuel Gas Code ANSI Z223.1 requires an at-
tic shield constructed of 26 gauge minimum metal that ex-
tends at least 2 in. (51 mm) above insulation.
Attic shields must meet specifi ed clearance and be se-
cured in place.
Flat Ceiling Installation
• Remove one shield from box.
Note: Cut previously installed batt insulation to make room
for the attic insulation shield.
• Wrap shield around pipe if pipe is already installed in
area to be insulated.
• Match the three holes in each side and fasten with three
screws to form a tube.
• Bend three tabs on the bottom of the shield outward to
allow attachment to the ceiling fi restop.
• Bend the remaining tabs inward 90° to maintain the air
space between the pipe and the shield. Set the shield
on the ceiling fi restop and attach to the fi restop.
• Bend all tabs inward 90° around the top of the shield.
These tabs must be used to prevent blown insulation
from getting between the shield and vent pipe, and to
maintain air space clearance.
Bend all tabs inward 90°
to maintain clearance and
prevent insulation from
falling inside.
Laser-etched
cut lines
Bend 3 tabs
outward to fasten
to ceiling firestop -
bend remaining
tabs inward 90° to
maintain clearance
Insert 3
screws
Figure 8.5 Attic Insulation Shield
Vaulted Ceiling Installation
• The attic insulation shield has been laser-etched with cut
lines and ceiling pitches to make fi eld trimming easier.
• Remove one shield from box.
NOTICE: Cut previously installed batt insulation to make
room for the attic insulation shield.
• Cut the attic insulation shield (if application is for vaulted
ceiling) using a laser-etched cut line, to fi t your ceiling
pitch. Snip cut edge to create 1 in. bend tabs.
• Wrap shield around pipe if pipe is already installed in
area to be insulated.
• Match the three holes in each side and fasten with three
screws to form a tube.
• Bend three tabs on the bottom of the shield outward to
allow attachment to the ceiling fi restop.
• Bend the remaining tabs inward 90° to maintain the air
space between the pipe and the shield. Set the shield
on the ceiling fi restop and attach to the fi restop.
• Bend all tabs inward 90° around the top of the shield.
These tabs must be used to prevent blown insulation
from getting between the shield and vent pipe, and to
maintain air space clearance.
Î