On Fri, 21 Dec 2007 09:09:25 -0500, Some Guy 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'll never recoup the cost. Wait for the unit to wear out and then replace
it with something more efficient. If the entire unit is hopelessly inefficient,
then retrofitting makes no sense; replace the entire unit.


Does anyone know what the "over-the-counter" cost is of these motors?
Does anybody know how to use a web search tool?


Also, do ECM motors generate electrical or RF noise that is either
radiated by the motor or fed back into the household wiring, thereby
messing up AM radio reception?
Probably not; the motor is likely to be inside a metal housing.