Doesn't the nest system give you all your data? I thought you could input cost of power and gas into it and have it tell you what you are using/saving? Just run it for a week her way and a week your way, hopefully the outside temp is close, and see who does better?
I'd be interested in the results as I never won that arguement. haha.
Also, happy wife, happy life, sometimes a little extra $ on a bill is worth it.
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