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13
W415-1401 / C / 03.18.15
EN
3.3 SPECIAL VENT INSTALLATIONS
3.3.1 PERISCOPE TERMINATION
12" (305MM)
MINIMUM
TO GRADE
U
se the periscope kit to locate the air termination above grade. The periscope must be installed so that
w
hen fi nal grading is completed, the bottom air slot is located a minimum 12” (304.8mm) above grade. The
m
aximum allowable vent length is 10’ (3.1m) for a fi replace and 8’ (2.4m) for a stove.
9.4A
12" (305MM)
MINIMUM
TO GRADE
30" (762MM)
MINIMUM
30" (762MM)
MINIMUM
34 1/16"
(865MM)
20” (508mm)
MAXIMUM
6” (152.4mm)
RISE
3.3.2 CORNER TERMINATION
The maximum vent length for a corner installation is 20" (508mm) of horizontal run, in addition to the 45°
offset. In this case zero rise is acceptable. However, it is recommended a 6" (152mm) rise be included. See
illustrations below:
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