Talonewo
Senior Member
On a chilled water air conditioning system with reverse cycle heat… why would not run the water loop through the a heat exchanger in the hot water heater? You could put valves and an expansion tank to close the loop when you wanted to cool. I could do the math to see how much energy could be added to the system but I’m confident it would not be enough to completely heat the boat but I’m sure it would reduce the load on the compressors. If the boat is moving or the generator is on it would be free heat… what am I missing?