Humidity can be a problem, especially in facilities below ground level, and often in old buildings with porous masonry. Ventilating such rooms is very important to remove humidity. However, ventilation should only be used when the weather is dry so as not to bring more humidity into the rooms.
The temperature and humidity sensors from Müller-Elektronik AG are ideally suited for this application. At least two sensors are used, one in the room to be dehumidified, the other outside, where the supply air comes from.
By using a gas control panel, the measured values of these sensors are evaluated and the ventilation is controlled using a special dehumidification program. Periodic ventilation should be reduced or suppressed if the humidity outside is too high. If the air outside is dry, ventilation should be particularly large and frequent in order to counteract the humidity problem.