He probably actually read that info off the wiring diagram.

"Stretch" wrote in message
oups.com...
Tom,

1) What is your temperature rise? Should be 40 to 60 degrees. If you
increase air flow, your gas efficiency will go up a little as you
remove more heat from the heat exchanger. Your flue temperature will
go down slightly, increasing combustion efficiency slightly. The
electric efficiency will go down a little as you will use more
electricity to move a little more heat. With a lower temperature rise,
your supply air temperature will go down, which may reduce your
comfort. Now your furnace supply air will feel like that from a heat
pump.

2) How did you measure the air flow? What instruments did you use?


There are tradeoffs to everything you do.

Stretch