My wet bay has heat from the furnace. I have a wireless temp sensor in it and the receiver in the house. Right now, 10:39 in Pioneer, CA the wet bay is 42 degrees. Outside temp is 33 degrees. I don't have the furnace on at this time, but will fire it up before I go to bed. Is it better to have a full fresh water tank or should I drain it. I would think keeping it full would be better. Your opinion...
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