Papa John
Lifetime Supportive Member
My rough draft idea for preheating water from plastic fresh water tank.
It uses the exhaust heat with a HX.
It takes water from transfer pump- to HX- out HX and into TM water inlet.
im using QCs for flexibility. as it would need to be moved to close the side door; I realize it will be hot.
I would not recommend this modification in hot weather or low flow water use. I like to use higher flow then my 370 is made for.
A future improvement would be to install it under the van with a custom exhaust system for the TM. and have manual diverter valves when hotter water isn't needed.

It uses the exhaust heat with a HX.
It takes water from transfer pump- to HX- out HX and into TM water inlet.
im using QCs for flexibility. as it would need to be moved to close the side door; I realize it will be hot.
I would not recommend this modification in hot weather or low flow water use. I like to use higher flow then my 370 is made for.
A future improvement would be to install it under the van with a custom exhaust system for the TM. and have manual diverter valves when hotter water isn't needed.
