25
Heat & Glo • SL-550BE, SL-550BE-IPI • 2114-900 Rev. H • 2/08
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 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 fi restop is only required on one side and no heat
shield is necessary.
If your local inspector requires the wall shield fi restop on
both sides, then both wall shield fi restops must have a heat
shield attached to them.
B. Wall Penetration Framing
Figure 6.3 Exterior Wall Hole
* 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.
A*
B*
C
D
SL-550BE
SL-550BE-IPI
in.
36-1/2
24-3/8
35-1/2
23-3/8
mm
927
619
902
593
6
Vent Clearances and Framing
C
D
B*
A*
WALL
HEAT
SHIELD
HEAT
SHIELD
3 in. TOP
CLEARANCE
WALL
SHIELD
FIRESTOP
1 in. CLEARANCE
BOTTOM & SIDES
7 in.
A. Pipe Clearances to Combustibles
Fire Risk.
Explosion Risk.
Maintain vent 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 vent pipe may cause fi re.
Figure 6.1 Pipe Clearances
1 in. CLEARANCE
AROUND VERTICAL
SECTIONS
3 in. TOP
CLEARANCE
1 in. SIDE AND
BOTTOM CLEARANCE
Note:
Slope
not required.
WARNING
Figure 6.2 DVP Horizontal Venting Clearances to Combustible
Materials
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 mm
to 184 mm) thick. If wall thickness is less than 4 in. (102 mm) the existing
heat shields must be fi eld trimmed. If wall thickness is greater than 7-1/4
in. (184 mm) a DVP-HSM-B will be required.
Note:
When using SL pipe, minimum clearances from the vent pipe to
combustible materials at fi restops are:
Top: 2-1/2 inches
Bottom: 1/2 inch
Sides: 1 inch