E. install attic insulation shield – Hearth and Home Technologies BIR42-B User Manual

Page 29

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Installation of a ceiling firestop is required
• Refer to Figures 8.6 - 8.8.
• Roll the shield around the chimney (if chimney is already

installed) until you have a 3 in. (76 mm) overlap and the

three holes on each side match up (large holes on top).

• Insert three screws into the matching holes to form a

tube.

• Bend three tabs on the bottom of the tube inward to 90°

to maintain chimney air space as shown in Figure 8.6.

• Rest the insulation shield on the ceiling firestop below.

• Bend the three short tabs at the top of the shield inward

to 90° to maintain the 2 in. (51 mm) air space from the

chimney.

• Bend the remaining top tabs to just meet the pipe.

3 in. (76 mm)

overlap

Insert three

screws

Bend inward

90°

Bend remaining tabs
to rest against pipe to
prevent insulation
from falling in.

Figure 8.6 Prepare Attic Insulation Shield

E. Install Attic Insulation Shield

WARNING! Risk of Fire! You MUST install an attic in-

sulation 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 chimney pipe could cause fire.

• DO NOT offset chimney inside insulation shield.

If you wish to make a custom shield or barrier, follow these

guidelines:
• Metal is preferred, although any material stiff enough to

hold back the insulation can be used.

WARNING! Risk of Fire! Use of cardboard or other

materials that can deflect under humidity or other envi-

ronmental conditions is not recommended.

• The shield or barrier must be tall enough to extend above

the insulation and prevent blown-in insulation from spilling

into the cavity.

• The shield should be affixed to building structure.

• Maintain specified air spaces around chimney.

• Check instructions and local codes for further details.

Heatilator • Birmingham BIR42-B • 4059-681C• 9/12

6 Tabs bent

in 90°

Tabs bent in to

rest against pipe

Attic Insulation Shield

Ceiling Firestop

13 in.

(330 mm)

17 in. (432 mm)

diameter

Insulation

Pipe