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W415-0434 / G / 08.08.11
3.3 SPECIAL VENT INSTALLATION
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
(including both rise and run) is 10’.
9.3A
12”
MIN TO
GRADE
30” MIN
36”