What is an ECM motor?

[drewski11]

You obviously didn't read anything I posted. Both are ECM controlled motors. I stated that. I am not confused about anything. I have designed control boards (not for HVAC) for both for crying out loud.

Are you unfamiliar with "layman's" terms?

you said "The X-13 is not an "ECM" motor." which is what got this started. are you saying x13 is a layman's term?

see the link i posted where Carrier refers to their X13 based furnace as ECM confusing the guy reading their website who posed the question on this forum.

i doubt the average layman knows Variable Speed, ECM, or X13. i think we should agree to disagree on this. peace.

[japinner]

Question for everyone. I just installed a 2ton gibson heatpump with aux heat. The temp is average of 35 to 45 degrees outside. My customer is keeping it at 70 degrees in the home. Is it sound normal to have a run time of 30 to 40minutes

[garya505]

I think you misplaced your question here, but ...

Whether this is "normal" depends on the heat loss of the house. But more importantly, if it's maintaining the setpoint at the design low temperature or below then it is sized right. Long runs times are fine and can result in better comfort.

[TwincamDave]

The biggest problem with oversizing your furnace is temp. spikes get exaggerated. Very hot then cool back and forth. size it right and walk away from it.