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W415-1407 / 11.20.14
11
EN
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” (305m) above grade. The maximum allowable vent length
(including both rise and run) is 10’ (3m).
9.3B
3.3 SPECIAL VENT INSTALLATIONS
3.3.1 PERISCOPE TERMINATION
30" (762mm)
MINIMUM*
12" (305mm)
MINIMUM
ABOVE
GRADE
46"
(1168mm)
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