Hearth and Home Technologies BE-36-C Vent Clearances and Framing, Combustible Wall Penetration

6 Vent Clearances and Framing

A. Pipe Clearances to Combustibles B. Wall Penetration Framing

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: Slope	3 in. TOP
not required.	CLEARANCE
1 in. CLEARANCE
AROUND VERTICAL
SECTIONS
	1 in. SIDE AND
	BOTTOM CLEARANCE
Figure 6.1 Pipe Clearances

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

The heat shield is designed to be used on a wall 4 in. to 7-1/4 in. (102

mmto 184 mm) thick. If wall thickness is less than 4 in. (102 mm) the existing heat shields must be field trimmed. If wall thickness is greater than 7-1/4 in. (184 mm) a DVP-HSM-B will be required.

HEAT

SHIELD3 in. TOP

CLEARANCE

HEAT SHIELD

7 in.

	1 in. CLEARANCE
WALL
	BOTTOM & SIDES
SHIELD
FIRESTOP

C

D

A*

B*

		A	B	C	D
BE-36-C	in.	36 1/2	24 3/8	35 1/2	23 3/8
	mm	927	619	902	594

*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 6.3 Exterior Wall Hole

Combustible Wall Penetration

Frame a hole in a combustible wall for an interior wall shield firestop, (Figure 6.2) whenever a wall is penetrated. Use same size framing materials as those used in the wall construction. The wall shield firestop maintains minimum clearances and prevents cold air infiltration.

Non-Combustible Wall Penetration

If the hole being penetrated is surrounded by noncombus- tible materials such as concrete, a hole with diameter one inch greater than the pipe is acceptable.

WALL

Figure 6.2 Horizontal Venting Clearances to Combustible Materials

22 Hearth & Home Technologies • BE-36-C, BE-36-CIPI • 397-981 Rev. V 1/07