I winterize each winter as you all do. BUT I also run a single, small, electric cube heater to keep things above 40F. I open all the under counter cabinet doirs to expse all plumbing possible. I am fortunate my coach s right outside my hone. So my wireless thermometer works great as I moitor the temp as well as the recorded high and low inside. I also keep a simple drop light directly beneath the water hoses in the utility/sanitation bay. In 11 years I've never had freeze damage. For the momentary quick chill, the cube heater does a great job.