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W415-0327 / B / 12.07.07
8
FIGURE 5
SPECIAL VENT INSTALLATIONS
NOTE:
When terminating vertically, the restrictor plate W500-
0205 must be installed. Refer to Restricting Vertical
Vents.
PERISCOPE TERMINATION
TYPICAL MINIMUM AND MAXIMUM VENT LENGTHS
FIGURES 4 a-b
Use only GD401 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 of 12" above
grade.