Wire Ties

4" Flex

Wire Ties

Figure 8.6 Installing Flex Pipe

F. Install Ceiling Firestops

Caution! Risk of Fire! Ceiling firestops must be used whenever the chimney penetrates a ceiling/floor.

Chase construction requires ceiling firestops at each floor or every 10 ft (3.05 m) of clear space.

The ceiling firestop slows spread of fire and reduces cold air infiltration.

Install a ceiling firestop whenever chimney penetrates ceiling/floor.

Mark and cut an opening in ceiling as shown in Figure 8.7.

Frame the opening with the same size lumber used in the ceiling joists.

Nail the ceiling firestop to the bottom of the ceiling joists when there is a room above.

Use an attic insulation shield if the ceiling is insulated. The ceiling firestop may then be attached above or below the joists.

Warning! Risk of Fire! Do NOT seal area between firestop opening and chimney pipe except where they enter the attic or leave the warm air envelope of the home (use 600° F sealant).

ROOM ABOVE (non-insulated ceiling)

B

A

Ceilng firestop

 

attached to bottom

 

of framing

2 in. (51mm)

 

clearance

ATTIC ABOVE (insulated ceiling)

Ceiling firestop

When attic insulation

attached to top of

shield not used

framing

 

2 in. (51mm)

clearance

Note: Use same dimensional lumber for framing ceiling firestop and joists.

 

 

A

 

B

Catalog #

in.

 

mm

in.

 

mm

FS338

14-1/2

 

368

14-1/2

 

368

FS339

14-1/2

 

368

18-3/8

 

467

FS340

14-1/2

 

368

23

 

584

Figure 8.7 Installing the Ceiling Firestop

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Heatilator • Constitution EPA Fireplace • 480-1091H

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Page 46
Image 46
Heatiator C40 owner manual Install Ceiling Firestops, Installing Flex Pipe

C40 specifications

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