User Guide

Page 20
FIGURE 26
TYPICAL AIR INTAKE
PIPE CONNECTIONS IN UPFLOW DIRECT VENT
APPLICATIONS
*2”
TRANSITION
2”
3”
Pipe size determined in table 5
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 27
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”