F. Installing Attic Insulation Shield

WARNING! Risk of Fire! You MUST install an attic insu- 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 chimney pipe could cause fire.

•DO NOT offset chimney inside insulation shield.

Installation of a ceiling firestop is required

•Refer to Figures 8.6 - 8.8.

•Roll the shield (around the chimney if 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.

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.

•Maintain specified air spaces around chimney.

•Check instructions and local codes for further details.

 

 

 

 

Bend remaining tabs

 

 

 

 

to rest against pipe to

Bend

 

inward

prevent insulation

90°

 

from falling in.

 

 

 

 

 

Insert three

 

 

 

 

screws

3 in. (76 mm) overlap

Figure 8.6 Prepare Attic Insulation Shield

 

 

Tabs bent in to

 

Pipe

rest against pipe

 

 

 

 

Attic Insulation Shield

 

 

14-1/2 in. (368 mm)

 

6 Tabs bent

diameter

 

in 90°

Ceiling Firestop

 

 

Insulation

Pipe

Insulation

10-1/2 in.

(267 mm)

Figure 8.7 Install Attic Insulation Shield (firestop above ceiling)

 

 

Tabs bent in to

 

 

rest against pipe

 

Pipe

 

 

 

Attic Insulation Shield

 

 

14-1/2 in. (368 mm)

 

 

diameter

 

6 Tabs bent

 

 

in 90°

 

Insulation

 

Insulation

10-1/2 in.

Pipe

Ceiling Firestop

(267 mm)

 

 

Figure 8.8 Install Attic Insulation Shield (firestop below ceiling)

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Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

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Hearth and Home Technologies A36RH, A42RH Installing Attic Insulation Shield, Prepare Attic Insulation Shield
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A36RH, A42RH, A36R, A42R specifications

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