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10"- 24"
6" MAX
4" MIN
90º OR 45°
ELBOW
Standard Horizontal Terminations (Dual Pipe)
Figure 17
Alternate Horizontal Vent Termination (Dual Pipe)
Figure 18
Combustion Air Intake may also be snorkeled
to obtain 12" min ground clearance.
Alternate Vent Termination Above Anticipated Snow
(Dual Pipe)
Figure 19
12" MIN. TO GRADE OR
HIGHEST ANTICIPATED
SNOW LEVEL
90°
ELBOWS
3" - 24"
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
90°
ELBOWS
3"-24" BETWEEN PIPES
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Level
Vent & Combustion Air Intake Measurements for
Standard Horizontal Terminations (Dual Pipe)
Center to center = 10" min / 24" max.
Vertical separation: 0" - 24"
Vent termination from wall = 8" min / 12" max.
Combustion air intake from wall = 6" max.
Vent and intake clearance to ground or anticipated snow
level = 12" min.
3" MIN
Termination of Multiple Direct Vent Furnaces
VENT/INTAKE TERMINATIONS FOR
INSTALLATION OF MULTIPLE DIRECT VENT
If more than one direct vent furnace is to be installed
vertically through a common roof top, maintain the same
minimum clearances between the exhaust vent and air
intake terminations of adjacent units as with the exhaust
vent and air intake terminations of a single unit.
If more than one direct vent furnace is to be installed
horizontally through a common side wall, maintain the
clearances as in the Figure 20. Always terminate all
exhaust vent outlets at the same elevation and always
terminate all air intakes at the same elevation.
H oriz ontal Ins tallation
Ve rtica l Ins tallation
Side Wall Vent Kit
Concentric Vent Termination
Refer to the directions provided with the Concentric Vent Kit or
IO-619 for installation specifications.
19
3"MIN
24"MAX
12" MIN SEPARATION
12" MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL
Figure 20
FURNACES
Figure 21
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