Rinnai EX38DT Installation And Operation Manual page 22

Incorrect Configurations
NOT CORRECT
 Too many bends (limit is 3)
 Air intake hose is above
exhaust pipe.
Figure 21
NOT CORRECT
Exhaust
Intake
Figure 23
22
Figure 22
90° Elbow Up
Configuration
NOT CORRECT
Back of Furnace
Do not allow any low points in the exhaust line.
CORRECT
Exhaust
Intake
EX38DT Installation and Operation Manual
Slope horizontal
sections 3°
downward
3°