13
W415-0802 / C / 12.15.10
20” MAXIMUM
6” RISE
MINIMUM
3.3 SPECIAL VENT INSTALLATIONS
3.3.1 PERISCOPE TERMINATION (CDV36 AND BCDV36)
12"
MINIMUM
TO GRADE
12"
MINIMUM
TO GRADE
30" MINIMUM
30" MINIMUM
3.3.2 CORNER TERMINATION
CDV36
The maximum vent length for a corner installation is 24", where only 6" of vertical rise is used. All corner
installations require a minimum 6" rise. See illustration below.
BCDV36
The maximum vent length for a corner installation is 20" of horizontal run, in addition to 45° offset. In this case
0" rise is acceptable when using rigid. Flexible venting must maintain a 6" rise. See illustration below.
BCDV36 ONLY
(WITH RIGID ONLY)
Use the periscope kit to locate the air termination above grade. The periscope must be installed so that when
fi nal grading is completed, the bottom air slot is located a minimum 12” above grade. The maximum allowable
vent length is 10’.
9.4
32 3/8"
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