"Some Guy" wrote in message ...
ransley wrote:

Just wondering if anyone has replaced their conventional
furnace / HVAC fan motor (PSC, single phase, etc) with one
of the new ECM motors to realize a reduction in your
electricity bill.

you need the electronics to run it, you cant just replace it my
Lennox guy said

I'm pretty sure that's not correct.

From what I can tell, all the electronics are inside the motor. You
hook up the main AC supply directly to the motor, just like a
conventional AC motor.

I don't think he was talking about the electronics of the motor.
Conventional motors were either ON or OFF and coincided with heat or cooling
on or off with a thermostatic delay. The newer ECM motors have a control
panel that changes the speed of the blower but at the same time controlling
the furnace heat output or the A/C compressor speed. Usually it is just a
two stage where there is a low and a high heat or A/C. I don't think you'd
get the full benefit by just switching motors if it didn't match the control
panel, burner and compressor.

-al sung
Rapid Realm Technology, Inc.
Hopkinton, MA