Lennox ML193UHE Series Unit Information page 26

TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN UPFLOW
EXHAUST
2"
Exhaust
DO NOT transition
from larger to smaller
pipe in horizontal runs
of exhaust pipe.
* When transitioning up in pipe size, use the shortest length of 2" PVC pipe possible.
TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT OR
NON-DIRECT VENT APPLICATIONS
EXHAUST
DIRECT OR NON-DIRECT VENT APPLICATIONS
EXHAUST
INTAKE
2"
3"
3"
NOTE − Exhaust pipe and intake pipe must be the same diameter.
FIGURE 25
12" max.
2"
2"
or
2"
2"
2"
2"
INTAKE
3"
*2"
EXHAUST
*2"
INTAKE
*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 26
Page 26
INTAKE
2"
Exhaust
DO NOT transition
from smaller to larger
pipe in horizontal runs
of exhaust pipe.
(RIGHT HAND DISCHARGE SHOWN)
Exhaust
2"
DO NOT transition
or 2"
from smaller to larger
pipe in horizontal runs
of exhaust pipe.
2"
2"
Exhaust
3"
DO NOT transition
from larger to smaller
pipe in horizontal runs
*2" of exhaust pipe.
Exhaust
2"
2"
2"
or
030/045/070 Only
1−1/2"
TRANSITION
2" 6" Min
Exhaust
45° 45°
MAX MAX
SIDE VIEW
030/045/070 Only
1−1/2"
TRANSITION
*2"
*2"