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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" (30.5cm) above grade.
The maximum allowable vent length is 10' (3.1m).
12"
MINIMUM
MINIMUM
3.3.2 CORNER TERMINATION
MAXIMUM 10FT VENT LENGTH
The maximum vent length for a corner installation is 20" (50.8cm) of horizontal run, in addition to the 45°
offset. In this case zero rise is acceptable. When using rigid venting, it is required to maintain a 6" (152mm)
IT INSTALLATION
rise. When using flexible venting, see illustrations below.
(50.8cm)
XIMUM
(50.8cm)
AXIMUM
30" (76.2CM)
MINIMUM
12"
MINIMUM
30"
REAR EXIT INSTALLATION
6" (152mm)
RISE MINIMUM
FLEXIBLE VENTING
12" (30.5CM)
MINIMUM
TO GRADE
30" (76.2CM)
MINIMUM
34 5/8"
(87.9CM)
12" (30.5CM)
MINIMUM
TO GRADE
30"
MINIMUM
9.4B
MAXIMUM 10FT VENT LENG
TOP EXIT INSTALLATION
20" (50.8cm)
MAXIMUM
RIGID VENTING
20" (50.8cm)
MAXIMUM
W415-1398 / C / 06.15.17
13
EN
12"
MINIMUM
30"
MINIMUM
REAR EXI
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