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.

Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38 mm).

SLP heat shield - designed to be used on a wall 4-3/8 in. (111 mm) to 7-1/2 in. (194 mm) thick.

If wall thickness is less than 4-3/8 in. (111 mm) the existing heat shields must be field trimmed. If wall thickness is greater than 7-1/2 in. (194 mm) a DVP-HSM-B will be required.

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.

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

 

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

 

overlap of attached heat shields must be maintained.

See Section 10.G for information for regarding the in-

3 in. (76 mm) top clearance

1 in. (25 mm) clearance around vertical sections

Heat

2-1/2 in. (64 mm)

Shield

top clearance

 

Heat

 

Shield

1 in.

1/2 in. (13 mm)

(25 mm)

bottom

clearance

clearance

bottom & sides

Wall

 

Shield

 

Firestop WALL

 

stallation of a horizontal termination cap.

Non-Combustible Wall Penetration

If the hole being penetrated is surrounded by noncom- bustible 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.

Figure 8.1 Horizontal Venting Clearances To Combustible

Materials

10 in.

(254 mm)

A

10in.

(254 mm)

B

A*

B

38 in (971 mm)

37-1/4 in. (946 mm)

*Shows center of flue framing hole. The center of the hole is 1 in. (25 mm) above the center of the horizontal flue pipe.

Figure 8.2 Wall Penetration

Heat & Glo • SOHO-N-AUB2197-980 Rev. F • 5/12

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Heat & Glo LifeStyle 2197-980 Vent Clearances and Framing, Pipe Clearances to Combustibles, Wall Penetration Framing

2197-980 specifications

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