Can water heater run while towing? Here's why . . .

Thanks for the link -- I am hoping to get info from the manufacturers on the decibel ratings of the smaller units and could then replace my existing pump.

Yes, we seldom use the furnace, but if we are camping in zero degree weather, we will have to have some heat inside the trailer -- probably a Wave 3.

You mention a low pressure circulating pump -- do you mean in addition to the main pump?? Not sure how that would be set up.