16
Combustion Air Intake may also be snorkeled to obtain 12” min ground clearance.
90°
ELBOWS
3”-24” BETWEEN PIPES
Alternate vent termination above anticipated
snow level (dual pipe)
Figure 19
Vent/Flue and Combustion Air Pipe Terminations
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.
Concentric Vent Termination
Refer to the directions provided with the Concentric Vent
Kit (DCVK) for installation specifications.
STRAIGHT
ELBOWS
Figure 16 Direct Vent (Dual Pipe) Piping
90°
ELBOWS
3” - 24”
Alternate Horizontal Vent Termination (Dual Pipe)
Figure 17
VENT/FLUE
TEE
COMBUSTION
AIR INTAKE.
DISTANCE BETWEEN
COMBUSTION AIR
INTAKE AND GRADE
DISTANCE BETWEEN
VENT AND GRADE
Figure 18
