[Googam]

Well that didn't work. Look here?
https://www.qbicheating.co.uk/blog/what-is-an-under-sink-water-heater.html#:~:text=Under%2Dsink%20water%20heaters %20are%20more%20energy%2Defficient%20than%20the,la rge%20amount%20of%20water%20hot.