8 Vent Clearances and Framing

A. Pipe Clearances to Combustibles

B. Wall Penetration Framing

 

 

WARNING! Risk of Fire! Maintain air space clearance to

Combustible Wall Penetration

 

 

 

vent. DO NOT pack insulation or other combustibles:

Whenever a combustible wall is penetrated, you must

Between ceiling firestops

 

frame a hole for the wall shield firestop(s). The wall shield

Between wall shield firestops

 

firestop maintains minimum clearances and prevents cold

• Around vent system

 

air infiltration.

 

 

 

 

 

 

Failure to keep insulation or other material away from

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

same size framing materials as those used in the wall

vent pipe may cause over heating and fire.

construction.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

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

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

overlap of attached heat shields must be maintained.

DVP heat shield - designed to be used on a wall 4 in. to 7-1/4 in. (102 mm to 184

 

mm) thick.

 

 

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

• If wall thickness is less than 4 in. the existing heat shields must be field trimmed. If

 

wall thickness is greater than 7-1/4 in. a DVP-HSM-B will be required.

only on interior walls. If your local inspector requires a

 

 

 

 

 

 

 

 

SLP heat shield - designed to be used on a wall 4-3/8 in. to 7-5/8 in. (111 mm to

wall shield firestop on both sides, then both wall shield

 

194 mm thick).

 

 

• If wall thickness is less than 4-3/8 the existing heat shields must be field trimmed.

firestops must have a heat shield (refer to Section 16.B.)

 

If wall thickness is greater than 7-5/8 in. a DVP-HSM-B will be required.

attached to them.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• See Section 10.M. for information for regarding the in-

 

 

(DVP-SLP Pipe Shown)

stallation of a horizontal termination cap.

 

 

 

Heat

3 in. (76 mm)

Non-Combustible Wall Penetration

 

 

 

 

If the hole being penetrated is surrounded by noncom-

 

3 in. (76 mm)

Shield

top clearance *

 

top clearance

 

Heat

bustible materials such as concrete, a hole with diameter

 

 

 

Shield

one inch greater than the pipe is acceptable.

 

1 in. (25 mm)

 

 

 

 

 

Whenever a non-combustible wall is penetrated, the wall

clearance around

 

 

vertical sections

 

 

shield firestop is only required on one side and no heat

 

 

 

 

 

 

 

 

 

 

 

 

1 in. (25 mm)

shield is necessary.

 

 

 

 

 

 

 

Wall

clearance

 

 

 

 

 

 

 

Shield

bottom & sides

 

 

 

 

 

 

 

 

 

Firestop

 

 

 

 

 

 

 

 

 

 

WALL

 

 

 

 

 

 

 

 

 

 

Heat

3 in. (76 mm)

 

 

 

 

 

 

 

 

 

Shield

top clearance *

 

 

 

 

 

 

 

 

 

 

Heat

 

 

 

 

 

 

 

 

 

 

Shield

 

 

 

 

 

 

 

 

 

 

 

10 in.

10 in.

C

D

 

 

 

 

 

 

 

 

 

 

 

 

Wall

1 in. (25 mm)

 

 

 

 

 

 

 

 

 

clearance

10 in.

12 in.

 

 

 

 

 

 

Shield

bottom & sides

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Firestop

 

 

 

 

 

 

 

 

 

 

WALL

 

A* B*

 

 

 

 

 

 

* When using SLP or SL-D pipe, minimum clearances from the vent pipe to combus-

 

 

 

 

 

 

 

 

tible materials at inside wall firestops are: Top: 2-1/2 in. (64 mm)

 

 

 

 

 

 

 

 

 

Bottom: 1/2 in. (13 mm)

 

 

 

 

 

 

 

 

 

Sides: 1 in. (25 mm)

 

 

 

A*

B*

C

D

Figure 8.1 Horizontal Venting Clearances To Combustible

SL-750TRS-IPI-E

 

 

Inches

 

41

27-7/8

40

26-7/8

 

 

 

 

 

 

 

 

 

 

 

Materials

 

 

SL-750TRS-E

Millimeters

 

1041

708

1016

683

 

 

 

 

SL-550TRS-IPI-E

Inches

 

37

24-3/8

36

23-3/8

 

 

 

 

SL-550TRS-E Millimeters

 

940

619

914

594

 

 

 

 

SL-350TRS-IPI

Inches

35-1/2

22-3/8

34-1/2

21-3/8

 

 

 

 

Millimeters

 

902

568

876

543

 

 

 

 

 

 

 

 

 

 

* Shows center of vent framing hole for top or rear venting.

 

 

 

 

The center of the hole is one (1) inch (25.4 mm) above the

 

 

 

 

center of the horizontal vent pipe.

 

 

 

 

 

 

 

Figure 8.2 Wall Penetration

 

 

 

 

 

 

 

Heat & Glo • SL-750TRS-IPI-E, SL-550TRS-IPI-E, SL-350TRS-IPI2120-901 Rev. G • 11/08

 

37

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Hearth and Home Technologies SL-550TRS-E, SL-750TRS-E owner manual Vent Clearances and Framing, Combustible Wall Penetration

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