508183-01
Issue 2114
Page 22 of 52
Figure 17.
Typical Air Intake Pipe Connections in Upflow Direct Vent Applications
TYPICAL INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT OR
NON-DIRECT VENT APPLICATIONS
2”
2”
2”
2”
or
AIR
INTAKE
2”
TRANSITION
3”
*2”
Pipe size determined in Table 5
or
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE
: Exhaust pipe and intake pipe must be the same diameter.
TYPICAL INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NON-DIRECT VENT
APPLICATION (RIGHT-HAND DISCHARGE SHOWN)
2”
2”
2”
2”
or
2”
AIR
INTAKE
TRANSITION
3”
*2”
*2”
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE
: Exhaust pipe and intake pipe must be the same diameter.
Figure 18.
Typical Air Intake Pipe Connections in Horizontal Direct Vent Applications
(Right Hand Discharge Shown)
