It seems more sensible to heat the water at the tap That would be luxurious, yes, but it's the more technically challenging/expensive option. You need a heater

It seems more sensible to heat the water at the tap That would be luxurious, yes, but it's the more technically challenging/expensive option. You need a heater in every tap, and you have to run 10AWG or a gas hardline to every tap. (I happen to have been contemplating the feasibility of this on my own)