Heatilator • Eclipse • 4049-229 Rev I • 08/09
0
W
ALL
No combustible
framing to be
located within
shaded area.
2 x 4 or
2 x 6
header
Drywall
3 in.
(76 mm)
1 in. (25 mm)
3/4 in. (19 mm)
minimum to
perpendicular
wall.
Air space clearance to
bottom and sides of
horizontal pipe must be
at least 1 in. (25 mm)
Note: Heat shields MUST overlap by a minimum of 1 1/2 in. (38 mm).
•
SLP heat shield
- designed to be used on a wall 4-3/8 in. to 7-5/8
in. (111 mm to 194 mm thick).
• If wall thickness is less than 4-3/8 the existing heat shields must
be field trimmed. If wall thickness is greater than 7-5/8 in. an
extended heat shield will be required.
* When using SLP pipe, minimum clearances from the vent pipe to
combustible materials at inside wall firestops are:
Top: 2-1/2 in. (64 mm)
Bottom: 1/2 in. (13 mm)
Sides: 1 in. (25 mm)
Framing should be
constructed of 2 X 4
lumber or heavier.
The center of the
framing hole is
1 in. [25mm] above
the center of the
horizontal vent pipe.
Vent
framing
hole
36 1/2 in. [927 mm]
(Center of pipe)
10 in.
[254mm]
10 in.
[254mm]
A. Pipe Clearances to Combustibles
WARNING! Risk of Fire!
Maintain air space clearance to
vent.
DO NOT
pack insulation or other combustibles:
• Between ceiling firestops
• Between wall shield firestops
• Around vent system
Failure to keep insulation or other material away from vent
pipe may cause over heating and fire.
8
Vent Clearances and Framing
Figure 8.2 Wall Penetration
Figure 8.1 Horizontal Venting Clearances To Combustible Materi
-
als
B. Wall Penetration Framing
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must
frame a hole for the wall shield firestops. A wall shield
firestop maintains minimum clearances and prevents cold
air infiltration.
• The opening must be framed on all four sides using the
same size framing materials as those used in the wall
construction.
• A wall shield firestop must be placed on each side of
an interior wall. A minimum /2 in. (8 mm) overlap of
attached heat shields must be maintained.
• See Section 0.I. for information for regarding the
installation of a horizontal termination cap.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by non-combus-
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.
