Randen how many btu is your heat pump? I've been thinking about getting a one ton window ac and hacking it for this project. I'm not sure when it will actually happen but in the near future I hope.
Another question. Lets say you had the ability to cut the tank open and insert a better heat exchanger of sorts. Would there be a different style of heat exchanger used then or still just the coiled up copper tube? I ask because I'm a certified tig welder and I have an extra water heater.
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