
Heat & Glo • SOHO-N-AU • 2197-900 Rev. C • 9/09
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 254 mm
greater than the pipe is acceptable.
B. Wall Penetration Framing
Figure 6.2 Exterior Wall Hole
A
B
254 mm
* Shows center of fl ue framing hole. The center of the hole is one 254 mm
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
762 mm TOP
CLEARANCE
254 mm CLEARANCE
AROUND VERTICAL
SECTIONS
254 mm SIDE AND
BOTTOM CLEARANCE
WARNING
A*
B
965 mm
934 mm
A. Pipe Clearances to Combustibles
6
6
Flue Clearances and Framing