Add Yahoo as a preferred source to see more of our stories on Google. Smart thermostats cost an average of $235, with an average range of costs between $105 and $365. The best smart thermostats ...

I would like to buy a Nest or Ecobee for my home, but not if I have to buy 6 separate $250 dollar thermostats. One smart unit to manage them all would be amazing, but I'd settle for 2 if needed. My ...