Lennox MERIT Series Installation Instructions Manual page 18

TYPICAL EXHAUST PIPE CONNECTIONS
045/070 Only
2"
1−1/2"
2"
2"
2"
TRANSITION 2"
or
2"
Exhaust
Exhaust
3"
DO NOT transition
from larger to smaller
pipe in horizontal runs
of exhaust pipe. TRANSITION
INTAKE EXHAUST
DO NOT transition from smaller
*2"
to larger pipe size in horizontal
TOP VIEW
runs of exhaust pipe.
* 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
045/070 Only
1−1/2"
2"
2"
TRANSITION
2"
2"
2"
or
2"
TRANSITION
3"
*2"
3"
*2"
TRANSITION
*2"
INTAKE
EXHAUST
TOP VIEW
* 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
Page 18