01-14-2026, 03:51 PM
Mark,
You might want to look into the double walled flat plate heat exchanger that many solar installs use for hot water. The way this would work is the hot water loop goes through the exchanger and you take one of the heater loops from the AH through the other side. The disadvantage is that you have to engineer how to activated one of the circ pumps when you need hot water. The advantage is that you retain the AH for coach heating, engine preheating, and coach heat while under way. Also it will be way easier to execute that pulling out the AH and replacing with a marine style hot water heater.
You might want to look into the double walled flat plate heat exchanger that many solar installs use for hot water. The way this would work is the hot water loop goes through the exchanger and you take one of the heater loops from the AH through the other side. The disadvantage is that you have to engineer how to activated one of the circ pumps when you need hot water. The advantage is that you retain the AH for coach heating, engine preheating, and coach heat while under way. Also it will be way easier to execute that pulling out the AH and replacing with a marine style hot water heater.
Richard and Rhonda Entrekin
95 Newell, 390 Ex caretaker
99 Newell, 512 Ex caretaker
07 Prevost Marathon, 1025
Maverick Hybrid Toad
Inverness, FL (when we're home
)