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3.3SPECIAL VENT INSTALLATIONS 3.3.1 PERISCOPE TERMINATION
Use the periscope kit to locate the air termination above grade. The periscope must be installed so that when final grading is completed, the bottom air slot is located a minimum 12” above grade. The maximum allowable vent length is 10’.
29" MINIMUM
12"
MIN. TO
GRADE
57" MINIMUM
20FT MAX
12"
MIN. TO
GRADE
26 3/4"
26 3/4"
9.7
