I didn't do the purge procedure on our residential fridge because we are leaving for FL this Friday. With a full tank of LP gas I left the heater on at 60 degrees. I went out today to put some stuff in the coach and it was colder in the coach than it was outside. The temperature inside the refrigerator was 32. I went through an entire tank of LP gas in a couple of weeks. I went out and bought one of the oil filled heaters to bring the temps up, but I can only hope the water lines did not bust in the refrigerator as it was the only thing that was not winterized.