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W415-0788 / A / 09.22.09
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’.
9.4
24” MAXIMUM
0” RISE
CORNER INSTALLATION
3.3.2 CORNER TERMINATION
3.3 SPECIAL VENT INSTALLATIONS
29" MINIMUM
12" MIN. TO
GRADE
12" MIN.
TO GRADE
The maximum vent length for a corner installation is 24".
24" MINIMUM
30 1/2"
3.3.1 PERISCOPE TERMINATION
FIGURE 3.3.1a FIGURE 3.3.1b
FIGURE 3.3.2