76 Installing a Common Vent System
9.6.3 Direct Vent Application – Horizontal
Installation
12" (300 mm) min.
Exhaust Gas
Intake Air
In cases where a 12” horizontal clearance is not possible, provide a
vertical clearance of at least 36” with the exhaust above the intake
but do not exceed 20’.
Intake
Maximum
length 20’
(6 m)
Minimum
(91 cm)
Exhaust
Note
●
The illustration is intended for reference purposes
only.
●
Direct the exhaust away from any building
openings.
●
During cold weather situations, the temperature of
the exhaust will be much warmer than the ambient
air. Therefore, you will see water vapor being
produced at the termination.
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