A small note on temperature regulation: as your room is well insulated and a modern, smart heat pump is used here, the room temperature only changes noticeably after a few hours. So for the sake of the environment, please be patient 🙂
In some TIN INNs we have installed ventilation systems that you can adjust yourself. This switch allows you to decide how strongly your room is ventilated.
If the switch lights up RED, the ventilation system is giving its all. If you switch it down to GREEN, it works particularly energy-efficiently and silently.