Most efficient way to use a heat pump?

[iamlucky13]

Definitely look into that. You may want to look up the installer manual for your thermostat, too, to help make sure it's configured correctly.

If you've got a two-stage heat pump and the thermostat is never calling on the second stage, you definitely won't be getting maximum benefit from it.

 

[nola mike]

Turns out that it is a 2 stage unit. I reconfigured the T-stat. Comparing some stats from last year to this year, looks like in the 20's the difference is pretty significant. I'm getting about 0.1 hours/degree day runtime this year, compared to > 0.2 hours/degree last year. I also insulated the attic, so I'm hoping that's contributing more. Stupid confounding variables.