We are in a climate area that is very cold most of the year. I'm trying to get prepared for winter (even though it's 90 degrees today) & am wondering what others do/use to keep their water unthawed when it's 20 below. If you make a recommendation of a product could you tell me where you bought it from? I am concerned about anything that would be a fire hazard because I plan to use the deep litter method during the winter & to me wood chips look like really good kindling. Others thoughts?