Which is most efficient for washing mc hot water from combo boiler(on demand) or heat it's own with electric ?
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I know that it can be done. I have seen plans for them. all you need is some pipe, three elements and three thermostats. I need the sizes and tech info. Any help would be apreciated. Thanks
The small, on-demand gas water heaters are great for saving on energy if you don't need lots of hot water, and the Europeans have been using them at least since the 1960's. They haven't really caught on here, and some plumbers I've talked with don't have a lot of experience with them.
I you have such a water heater, is it reliable? If something goes wrong how difficult is it to find someone to fix it? And are you saving a lot of energy?