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11
W415-1345 / C / 02.14.17
EN
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).
9.4B
12" (30.5cm)
MIN TO
GRADE
12" (30.5cm)
MIN TO
GRADE
3.3.2 CORNER TERMINATION
30" (76.2cm)
MIN
30"
(76.2cm)
MIN
34"
(86.4cm)
24 1/4"
(61.6cm)
20” (50.8cm)
MAXIMUM
6” (152.4mm)
RISE MINIMUM
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"(15.2cm) rise
when using fl exible venting. See illustrations below.
FLEXIBLE VENTING RIGID VENTING
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