TYPICAL EXHAUST PIPE CONNECTIONS

Pipe size determined in table 7.

2”

2”

3”

2”

2”

2”

or

TRANSITION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DO NOT transition from smaller

INTAKE EXHAUST

 

 

 

 

 

 

 

 

 

 

 

 

*2”

 

 

 

 

 

 

 

 

to larger pipe size in horizontal

 

 

 

 

 

 

 

 

 

 

 

runs of exhaust pipe.

 

TOP VIEW

*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 20

TYPICAL INTAKE PIPE CONNECTIONS

Pipe size determined in table 7.

2”2”

2” 2”

2” or

TRANSITION

3”

*2”

TRANSITION

*2”

*2”

3”

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 21

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Lennox International Inc MERIT SERIES GAS FURNACE DOWNFLOW AIR DISCHARGE Typical Exhaust Pipe Connections, Intake Exhaust