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139467_03 GF 370 DV II June 2015
Figure 17 . Vent Termination Diagram.
Intake Air - Fully Closed
Full Exhaust Restriction
Half Exhaust Restriction
No Exhaust Restriction
Intake Air - Fully Open
Intake Air - Half Closed
ANY VENTING WITH A VERTICAL RISE MUST
TERMINATE (END) WITHIN THE SHADED AREAS.
A maximum of
two 90° or four 45°
elbows may be used.
Whenever possible,
use 45° elbows instead
of 90° elbows as these
offer less restriction to
the flow of flue gases
and intake air. Use of
elbows may adversely
affect IPI functionality.
In such cases, CPI
mode should be used.
Reduce the overall
horizontal run by 5 feet
for each additional 45°
and 90° elbow.
When two or more
elbows are used in a
horizontal run, a less
restricted setting may
be more effective
than that indicated by
the termination zone
diagram.