At the moment I arrived the window was open, the heater was warm although the thermostat was turned to an off position. It had -7 degrees outside and in the room it was ice cold, too. I shut the window and turned on the heater, but it needed several hours to get warm. Even the blanket was not adequate for that kind of cold room. The blanket given would have been suitable for a warm country, but not for Munich in Winter.