Heat & Glo • Soho-CE • 2111-900 Rev. D • 6/07
15
Combustible Wall Penetration
Frame a hole in a combustible wall for an interior wall
shield fi restop, (Figure 6.2) whenever a wall is penetrated.
Use same size framing materials as those used in the wall
construction. The wall shield fi restop maintains minimum
clearances and prevents cold air infi ltration.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by noncombustible
materials such as concrete, a hole with diameter 2.54 cm
greater than the pipe is acceptable.
B. Wall Penetration Framing
Figure 6.2 Exterior Wall Hole
A
B
25.4 cm
* Shows center of fl ue framing hole. The center of the
hole is one 2.54 cm above the center of the horizontal
fl ue pipe.
Fire Risk.
Explosion Risk.
Maintain fl ue clearance to combustibles as
specifi ed.
• Do not pack air space with insulation or other
materials.
Failure to keep insulation or other materials
away from fl ue pipe may cause fi re.
Figure 6.1 Pipe Clearances
7.62 cm TOP
CLEARANCE
2.54 cm CLEARANCE
AROUND VERTICAL
SECTIONS
2.54 cm SIDE AND
BOTTOM CLEARANCE
WARNING
A*
B
96.5 cm
93.4 cm
A. Pipe Clearances to Combustibles
6
6
Flue Clearances and Framing
