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W415-0895 / C / 03.13.12
3.3 SPECIAL VENT INSTALLATIONS
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’ for a
fi
replace and 8’ for a stove.
9.1A
12”
MIN TO
GRADE
24” MINIMUM
3.3.1 PERISCOPE TERMINATION
3.3.2 CORNER TERMINATION
The maximum vent length for a corner installation is 24” of horizontal run
with a minimum 8” rise.
24”
MAX
NOTE: There MUST be a 25% reduction in total
horizontal length (H
T
) when using fl ex vent.
40 13/16”