Page 25
FIGURE 24
TYPICAL AIR INTAKE
PIPE CONNECTIONS IN UPFLOW DIRECT VENT
APPLICATIONS
*2”
TRANSITION
2”
3”
Pipe size determined in table 14
2”
2”
2”
2”
or
AIR INTAKE
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE − Intake and exhaust pipe must be the same diameter.
or
FIGURE 25
TYPICAL AIR INTAKE
PIPE CONNECTIONS IN HORIZONTAL DIRECT VENT APPLICATIONS
(RIGHT HAND DISCHARGE SHOWN)
2”
2”
2”
2”
or
TRANSITION
3”
2”
AIR
INTAKE
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE − Intake and exhaust pipe must be the same diameter.
*2”
*2”
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