Re: Hot water?
I have the Espar and love it. Never had a problem. However one option not presented above is to install just a flat plate heat exchanger and an inline aux coolant pump. If the engine is still warm, there is a ton of BTUs there for showers etc. without the engine or Espar running. Also, with the Espar, or just when using the flat plate heat exchanger as you are driving down the road, the coolant temperature can be 180 to 200 degrees so scalding is a threat. I'm in the process of installing a mixing valve to greatly lessen that problem. Also be advised that different mixing valves have different temperature ranges for the outflow. I picked one with a low-low end of the range.
2006 EB 6.0 Diesel, custom gaucho,
Espar hydronic and heat, 2 Solara panels,
Trojan F&R, ARB lockers, Warn winch.