Heatilator • Novus NDV Series • 4055-187 Rev J • 08/09
34
* When using SLP pipe, minimum clearances from the vent pipe to combus-
tible materials at inside wall firestops are: Top: 2-1/2 in. (64 mm)
Bottom: 1/2 in. (13 mm)
Sides: 1 in. (25 mm)
Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38 mm).
•
DVP heat shield
- 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. the existing heat shields must be field trimmed.
If wall thickness is greater than 7-1/4 in. a DVP-HSM-B will be required.
•
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. a DVP-HSM-B will be
required.
(DVP-SLP Pipe Shown)
3 in. (76 mm)
top clearance *
1 in. (25 mm)
clearance
bottom & sides
Heat
Shield
Wall
Shield
Firestop
Heat
Shield
WALL
3 in. (76 mm)
top clearance *
1 in. (25 mm)
clearance
bottom & sides
Heat
Shield
Wall
Shield
Firestop
Heat
Shield
WALL
3 in. (76 mm)
top clearance
1 in. (25 mm)
clearance around
vertical sections
B*
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.
A*
Vent framing hole.
DO NOT PACK WITH
INSULATION OR
OTHER MATERIAL.
* To center of pipe.
10 in.
12 in.
A
Top Vent
B
Rear Vent
Model
mm
in.
NDV3630
NDV3933
NDV4236
NDV4842
1003
597
23-1/2
39-1/2
A. Pipe Clearances to Combustibles
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Maintain air space clearance to
vent.
'2127
pack insulation or other combustibles:
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• Around vent system
Failure to keep insulation or other material away from
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8
Vent Clearances and Framing
B. Wall Penetration Framing
Combustible Wall Penetration
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7KHZDOOVKLHOG¿UHVWRSPDLQWDLQVPLQLPXPFOHDUDQFHVDQG
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Non-Combustible Wall Penetration
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-
WLEOHPDWHULDOVVXFKDVFRQFUHWHDKROHZLWKGLDPHWHULQ
JUHDWHUWKDQWKHSLSHLVDFFHSWDEOH
:KHQHYHUDQRQFRPEXVWLEOHZDOOLVSHQHWUDWHGWKHZDOO
VKLHOG ¿UHVWRS LV RQO\ UHTXLUHG RQ RQH VLGH DQG QR KHDW
VKLHOGLVQHFHVVDU\
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ERWKVLGHVWKHQERWKZDOOVKLHOG¿UHVWRSVPXVWKDYHDKHDW
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Figure 8.2 Wall Penetration DVP only
Figure 8.1 Pipe Clearances
