Originally Posted by toshu
so, you have a small heater in the wet bay on a thermostat (presumably from the factory) and you added a small fan to circulate the air in the winter??
It's a little more complicated. So now they come from the factory with a thermostat that controls one of the aqua hot heat sinks. I was before this and added my own, so my thermostat controls the heat sink that heats the wet bay as well as the bathroom. Too much external heat in the wet bay and I get no aqua hot heat in my bathroom. I have a 110v heater that has a fan mode so most of the time (above 0F) I just run it in fan mode and it seems to balance perfectly between keeping the water hose on the opposite side of the bay from freezing while still calling for enough heat to heat my bathroom. A separate space heater may be just as simple if you aren't limited like me, but still I think the circulation to keep from getting cold spots in the bay was what I'm getting at.