Lennox MERIT Series Installation Instructions Manual page 20

045/070 Only
1−1/2"
TRANSITION
Exhaust
DO NOT transition
from larger to smaller
pipe in horizontal runs
of exhaust pipe.
045/070 Only
1−1/2"
TRANSITION
2"
TYPICAL EXHAUST PIPE CONNECTIONS
2"
2"
2"
3"
TRANSITION
* 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 23
TYPICAL INTAKE PIPE CONNECTIONS
2"
2"
3"
TRANSITION
*2"
* When transitioning up in pipe size, use the shortest length of 2" PVC pipe possible.
NOTE − Intake pipe and exhaust pipe must be the same diameter.
Figure 24
2"
2"
or
Exhaust
DO NOT transition from smaller
*2"
to larger pipe size in horizontal
runs of exhaust pipe.
2"
2"
or
TRANSITION
*2"
3"
*2"
Page 20
2"
INTAKE
TOP VIEW
2"
INTAKE
EXHAUST
TOP VIEW
EXHAUST