Hearth and Home Technologies Cyclone-BN Vent Clearances and Framing, Wall Penetration Framing

6 Vent Clearances and Framing

A. Pipe Clearances to Combustibles

WARNING

Fire Risk. Explosion Risk.

Maintain vent clearance to combustibles as specified.

•Do not pack air space with insulation or other materials.

Failure to keep insulation or other materials away from vent pipe may cause 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).

•If wall thickness is less than 4-3/8 the existing heat shields must be field trimmed. If wall thickness is greater than 7-5/8 in. a DVP- HSM-B will be required.

Heat

2-1/2 in. (64 mm)Shields top clearance at

wall shield firestops

3 in. (76 mm) top clearance

B. Wall Penetration Framing

Combustible Wall Penetration

Whenever a combustible wall is penetrated, you must frame a hole for the wall shield firestop. 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.

•See Section 8.L. for information for regarding the instal- lation of a horizontal termination cap.

Non-Combustible Wall Penetration

If the hole being penetrated is surrounded by noncombus- tible 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.

1 in. (25 mm) clearance around vertical sections

Wall

Shield

Firestop

1 in. (25 mm) clearance bottom and sides

1/2 in. (13 mm) bottom clearance at wall shield firestops

WALL

A Do NOT pack with insulation or other materials.

B

Figure 6.1 Horizontal venting clearances to combustible materials

C*

*TO CENTER OF FRAMING HOLE

SL Pipe Clearances to Combustibles

	A	B	C
Inches	10	10	66-1/2
mm	254	254	1689

Figure 6.2 Exterior Wall Hole

Heat & Glo • Cyclone-BN, Cyclone-BC • 2073-900 Rev. N • 10/08 17