It is not for comfort, it is to keep it dry inside. All plumbing is dry,=20 so freezing is not the problem. With wide temperature swings mold &=20 mildew is a problem. It was 70 degrees here today in North Carolina and=20 probably less than 30 degrees in the next 48 hours. I will monitor=20 conditions and try to save the electric bill! On 12/22/2013 7:55 PM, IVP wrote: >> turns on at 35F and off at 45F > Brrrrr, chilly. Did you buy your heater on Opposite Day ? I think > you got fobbed off with an ice-maker > > Joe --=20 John Ferrell W8CCW "It does not matter How many resources you have, If you don't know how to use them, They will not be enough" --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .