8 Vent Clearances and Framing

A. Pipe Clearances to Combustibles

WARNING! Risk of Fire! Maintain air space clearance to vent. DO NOT pack insulation or other combustibles:

•Between ceiling firestops

•Between wall shield firestops

•Around vent system

Failure to keep insulation or other material away from vent pipe may cause over heating and fire.

B. Wall Penetration Framing

Combustible Wall Penetration

Whenever a combustible wall is penetrated, you must frame a hole for the wall shield firestop(s). The wall shield firestop maintains minimum clearances and prevents cold air infiltration.

• The opening must be framed on all four sides using the

same size framing materials as those used in the wall

construction.

3 in.

(76 mm)

Sheetrock

2 x 4 or 2 x 6 header

WALL

Air space clearance to bottom and sides of horizontal pipe must be at least 1 in. (25 mm)

No combustible framing to be located within shaded area.

1-1/2 in.

(38 mm)

• SLP pipe - A wall shield firestop must be placed on each

side of an interior wall. A minimum 1 1/2 in. (38 mm)

overlap of attached heat shields must be maintained.

• DVP pipe - A wall shield firestop is required on one side

only on interior walls. If your local inspector requires a

wall shield firestop on both sides, then both wall shield

firestops must have a heat shield attached to them.

• See Section 10.I. & 10.J. for information for regarding

the installation of a horizontal termination cap.

Non-Combustible Wall Penetration

If the hole being penetrated is surrounded by non-combus- tible materials such as concrete, a hole with diameter one inch greater than the pipe is acceptable.

Whenever a non-combustible wall is penetrated, the wall shield firestop is only required on one side and no heat shield is necessary.

Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38 mm). The heat shield is designed to be used on a wall 4 in. to 7-1/4 in. (102 mm to 184 mm) thick. If wall thickness is less than 4 in. (102 mm) the existing heat shields must be field trimmed. If wall thickness is greater than 7-1/4 in. (184 mm) a DVP-HSM-B will be required.

 

10 in.

Vent framing hole.

 

 

 

 

DO NOT PACK WITH

12 in.

 

INSULATION OR

 

OTHER MATERIAL.

 

 

3 in. (76 mm)

Heat

top clearance

 

 

Shield

1 in. (25 mm)

1 in. (25 mm)clearance

 

bottom & sides

clearance

 

 

 

around vertical

 

 

sections

 

Wall

 

 

Shield

 

 

Firestop

3 in. (76 mm) top clearance

Heat

Shield

1 in. (25 mm) clearance bottom & sides

The center of the

 

framing hole is

 

1 in. (25mm) above

 

the center of the

A*

horizontal vent pipe.

 

Framing should be constructed of 2 X 4 lumber or heavier.

WALL

Figure 8.1 Vent Pipe and Horizontal Venting Clearances To Com- bustible Materials

 

* To center of pipe.

 

 

 

Appliance

 

A

IDV4833

 

64-1/8 in./1629 mm

IDV6247

 

68-5/8 in./1743 mm

Figure 8.2 Wall Penetration

28

Heatilator • ICON DV-IDV Series • 4042-575 • Rev. S • 5/11

Page 27 Page 29
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Image 28
Heatiator IDV4833IT owner manual Vent Clearances and Framing, Pipe Clearances to Combustibles, Wall Penetration Framing
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IDV4833IT specifications

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