In water works and pumpstations, there will often occur problems with condensation on cold surfaces.
A DST dehumidifier will reduce the humidty in the air and the result will be a humidity problems in water works and pumpstations often occur during the months with highest humidity.
With a controlled level of humidty, there will be no condensation, and therefor no problems with corrosion or a poor indoor climate. A lower humidity also improves general safety of electrical equipment.
Moisture will not condense on a surface if the air in contact with it has a dew point lower than the surface temperature.