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B. Wall Penetration Framing/Firestops
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must
frame a hole for the wall shield firestop(s). The 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.
• SLP pipe - A wall shield firestop must be placed on each
side of an interior wall. A minimum 1-1/2 in. (38 mm)
overlap of attached heat shields must be maintained.
• DVP pipe - A wall shield firestop is required on one side
only on interior walls. If your local inspector requires a
wall shield firestop on both sides, then both wall shield
firestops must have a heat shield (refer to Section
12.A.) attached to them.
• See Section 7.F. for information for regarding the instal-
lation of a horizontal termination cap.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by non-com-
bustible 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.
Heatilator • CRAVE4836-C/ST-C, CRAVE6048-C/ST-C, CRAVE7260-C/ST-C, CRAVE8472-C/ST-C Installation Manual • 2601-980 Rev. N • 11/21
DO NOT PACK VENT FRAMING HOLE WITH INSULATION
OR OTHER MATERIAL.
12 in.
10 in.
A
MODEL
CRAVE4836-C
CRAVE4836ST-C
CRAVE6048-C
CRAVE6048ST-C
CRAVE7260-C
CRAVE7260ST-C
CRAVE8472-C
CRAVE8472ST-C
* Shows center of vent framing hole for top venting. The
center of the hole is one (1) in. (25.4 mm) above the
center of the horizontal vent pipe.
Note: Measurements for CRAVE4836-C/CRAVE6048-C and
CRAVE7260-C were taken with an 18 inch vertical
section of pipe directly off the top of appliance.
Measurements for CRAVE8472-C were taken with an
30 inch vertical section of pipe directly off the top of
appliance.
Note: Center of the horizontal vent pipe to the vertical
measuring surface of a trap cap is 5 inches (127 mm).
Figure 5.2 Wall Penetration
B
A*
B
64 in.
63 in.
1.63 m
1.60 m
76 in.
75 in.
1.93 m
1.90 m
43
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