If we get to low single digits, the third stage (heat strips) kick in for about an hour. The difference is with the new thermostat, we KNOW is it on...previously we never could tell without going downstairs.
That is amazing, that you haven't hit third stage; when we thought that, we ended up with quite an eletric bill when we first installed the geo (and after some fine-tuning the problem went away).
I'd be curious what others have experienced with when their heat strips do kick in.
We are definitely still pleased with the geo system inplace.
