16
12" MIN. TO GRADE OR
HIGHEST ANTICIPATED
SNOW LEVEL
6” MAX
10”- 24”
4” MIN
Standard Horizontal Terminations (Dual Pipe)
Figure 17
90°
ELBOWS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3” - 24”
Alternate Horizontal Vent Termination (Dual Pipe)
Figure 18
90°
ELBOWS
Combustion Air Intake may also be snorkeled
to obtain 12” min ground clearance.
Alternate Vent Termination Above Anticipated Snow Level
(Dual Pipe)
Figure 19
3” MIN
12” MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL
3”MIN
24”MAX
12” MIN SEPARATION
Termination of Multiple Direct Vent Furnaces
Figure 20
Vent/Intake Terminations For Installation of
Multiple Direct Vent Furnaces
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 following figure. Always terminate all
exhaust vent outlets at the same elevation and always
terminate all air intakes at the same elevation.
3” MIN
12” MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL
10”MIN
24”MAX
12” MIN SEPARATION
Termination of Multiple Direct Vent Furnaces
Figure 21
Concentric Vent Termination
Refer to the directions provided with the Concentric Vent
Kit or IO-619 for installation specifications.
