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: Slope

3 in. TOP

not required.

CLEARANCE

 

1 in. CLEARANCE

 

 

AROUND VERTICAL

 

 

SECTIONS

 

 

 

1 in. SIDE AND

 

 

BOTTOM CLEARANCE

Figure 6.1

Pipe Clearances

 

B. Wall Penetration Framing

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.

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

If your local inspector requires the wall shield firestop on both sides, then both wall shield firestops must have a heat shield attached to them.

12 in.

10 in.

39-7/8 in.

40-7/8 in.*

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

Figure 6.2 Exterior Wall Hole

Heat & Glo • Crescent II • 2083-902 Rev. N • 7/09

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Heat & Glo LifeStyle CRESCENT II Vent Clearances and Framing, Pipe Clearances to Combustibles, Wall Penetration Framing

CRESCENT II specifications

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