Along the same line of thinking, tankless water heating [1] seems like a no-brainer. It surprises me that places like the US have not used it as the default fro

Along the same line of thinking, tankless water heating [1] seems like a no-brainer. It surprises me that places like the US have not used it as the default from the start. [1]: https://en.wikipedia.org/wiki/Tankless_water_heating https://en.wikipedia.org/wiki/Tankless_water_heating