I have set the new heat pump reverse cycle A/C unit to 20ºC. According to the temperature sensors in. the stereo pair of HomePods in the same room, the temperature is between 19.6º and 20.5º. The 10-year-old model that was changed over early yesterday morning struggled to get with 4 to 5º of the selected setting.
The new one is maintaining those temperatures on the lowest fan setting with the quiet setting also active; the quiet setting reduces airflow noise.
The old unit needed to have its fan on a higher setting in order to achieve any useful heating effect.