You posted about heating up your water tanks in order to heat your boat.
I have been thinking about that, seems like a great idea, but I have a couple of questions:

1/ I have always thought that nasty things would multiply faster in warm water; I don't consider water from a hot water tank potable. Is this not a concern ?

2/ What is the flow rate through your water heater when you do this ? Is the fresh water pump cycling all the time ? Annoying ?

Cheers,
JM.