11
W415-0663 / C / 03.17.11
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’.
9.1
3.3 SPECIAL VENT INSTALLATIONS
3.3.1 PERISCOPE TERMINATION
12"
MINIMUM
TO GRADE
30" MINIMUM
20 1/4"