You can use the control unit of a Combi heater to adjust a suitable air humidity level and temperature. However, the air humidity setting will determine the maximum temperature – high humidity in an extremely hot sauna can be a dangerous combination. Therefore, the system has a set limit that ensures safe and pleasant baths. The maximum value is the temperature and humidity percentage sum of 140.
Blue arrow in the chart: humid and soft steam.
Red arrow in the chart: hot and sharp steam.