[Jack Houpe]

Thanks for that description I knew one of the pumps would have to come on in order for the heat exchanger to work. Not trying to reinvent the wheel but why didn't they duck air down low in the water bay where the pumps are located, hot air rises so that would seem to be better than the electric unit over the top of the tank. If you had your water tank topped off and had a way to heat the water tank to 60-65 degrees you wouldn't any heat at all.

Gordon how did your Lithiums hold out in that cold weather?