It's the middle of winter and you're ready to go on vacation. You pack your swimsuit, check your flight info, and get ready to turn down the thermostat. After all, you don't want to waste money or energy warming up a house that won't have anybody in it. But how low is too low? And will you really save that much money? Or does it take just as much energy as you saved to warm your house back up after turning it down?
Here's what we know: