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. to 7-5/8 in. (111 mm to 194 mm thick).

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B. Wall Penetration Framing

Combustible Wall Penetration

Whenever a combustible wall is penetrated, you must frame a hole for the wall shield fi restop(s). The wall shield

restop maintains minimum clearances and prevents cold air infi ltration.

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 fi restop 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.

See Section 10.K. for information for regarding the in- stallation of a horizontal termination cap.

Non-Combustible Wall Penetration

3 in. (76 mm) top clearance

1 in. (25 mm) clearance around vertical sections

(SLP Pipe Shown)

 

Heat

3 in. (76 mm)

Shield

top clearance *

 

Heat

 

Shield

 

1 in. (25 mm)

Wall

clearance

Shield

bottom & sides

Firestop

 

WALL

 

If the hole being penetrated is surrounded by noncom- bustible materials such as concrete, a hole with diameter one in. greater than the pipe is acceptable.

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

DO NOT PACK WITH

INSULATION OR

OTHER MATERIAL

* When using SLP pipe, minimum clearances from the vent pipe to combustible materi-

als at inside wall firestops are:Top: 2-1/2 in. (64 mm) Bottom: 1/2 in. (13 mm) Sides: 1 in. (25 mm)

Figure 8.1 Horizontal Venting Clearances To Combustible Materials

10 in.

A

10 in.

B

A*

B

48-1/16 in.

47-1/16 in.

*Shows center of vent framing hole for top venting. The center of the hole is one (1) in. (25.4 mm) above the center of the horizontal vent pipe.

Figure 8.2 Wall Penetration

Heat & Glo • SLR-B2195-900 Rev. P • 12/11

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Heat & Glo LifeStyle SLR-B (COSMO) Vent Clearances and Framing, Pipe Clearances to Combustibles, Wall Penetration Framing

SLR-B (COSMO) specifications

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