Because we were leaving for St. Louis for a week and a half we turned the thermostat down to 50 degrees. When we arrived home on Monday our house was an ice box- way to cold for our little ones! Brian assured me they would be fine but being the paranoid mom I am I bundled them in their hats and snow suits (which are about three sizes too big) until the temp was 72- you can never be too warm, right?!