Heat & Glo LifeStyle PIER-36TR-IPI Vent Clearances and Framing, B. Wall Penetration Framing

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).

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

‡,f wall thickness is less than 4 in. the e[isting heat shields must be field trimmed. ,f wall thickness is greater than 7-1/4 in. a DVP-HSM-B will be required.

‡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).

‡,f wall thickness is less than 4-3/8 the e[isting heat shields must be field trimmed. ,f wall thickness is greater than 7-5/8 in. 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 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 (refer to Section 16.B.)
	attached to them.
•	See Section 10.M. for information for regarding the in-

3 in. (76 mm) top clearance

1 in. (25 mm) clearance around vertical sections

(DVP-SLP Pipe Shown)
Heat	3 in. (76 mm)
Shield	top clearance *
	Heat
	Shield
	1 in. (25 mm)
Wall	clearance
Shield	bottom & sides
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 in. 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.

Heat

Shield

Wall

Shield

Firestop

WALL

3 in. (76 mm) top clearance *

Heat

Shield

1 in. (25 mm) clearance bottom & sides

10 in. 12 in.

C D

10 in. 12 in.

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

als at wall shield 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

A* B*

A*	B*	C	D
43-3/4 in.	28 in.	42-3/4 in.	27 in.

*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

Note: When venting off the top of the unit and terminating horizontally, using SLP pipe, a 10 in. x 10 in. framing hole is required.

Heat & Glo • ST-36TR-IPI, PIER-36TR-IPI • 2176-900 Rev. F • 8/11 37