Most of the thermostats cannot measure the room temperature in the bathroom, as a remote thermostat is required e.g. the Wifi version. This was not explained.
Although the marketing makes it sound very simple for a DIY'er, there is NO WARRANTY unless a registered qualified electrician does the work. A plumber or fitter is not qualified.
Heater is not installed yet, but expect it to be a useful addition to our new bathroom.