12
3.3
SPECIAL VENT INSTALLATIONS
3.3.1 PERISCOPE TERMINATION
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' for a fi replace
and 8' for a stove.
3.3.2 CORNER TERMINATION
The maximum vent length for a corner installation is 20" of horizontal run, in addition to the 45° offset. In this
case zero rise is acceptable when using rigid. Flexible venting must maintain a 6" rise. See illustration below.
W415-0662 / D / 08.10.12
24" MINIMUM
6" RISE
MINIMUM
20 1/4"
9.6A
20" MAXIMUM
12"
MINIMUM
TO GRADE