The dew point temperature is that temperature at which condensation develops on a surface.
For example: At an air temperature of 24.0°C and at 60% relative humidity, the dew point is at a temperature of 15.8°C. If there is a surface in this room that is 15.8°C or colder, water droplets will develop on it.
The objective of dew point monitoring is to avoid this.
In buildings, condensation, sometimes also referred to as „dew water“, occurs particularly on cooled pipes and surfaces of air conditioning systems. The moisture of the warm room air can settle here if surface and dew point temperatures approach similar values.
Thanks to the monitoring process, the building automation system can implement timely measures in order to avoid droplet formation. For example, the temperature of the coolant may be raised (reduction of air conditioning), the room temperature may be raised, or the air humidity lowered (ventilation).
However, manual monitoring is very time-consuming and uncomfortable. Therefore, many devices from Elsner Elektronik offer integrated dew point monitoring. Through the smart combination of Elsner Elektronik sensors, room controllers and actuators, the danger is recognised in good time and countermeasures can be taken. Connected windows, fans, heating and air conditioning systems are controlled to prevent the formation of condensation water.