Condensation free environment with Munters

The water treatment facility in Glandorf by Osnabruck in Germany supplies drinking water to 120,000 users. Every year consumer households, local industries and farms consume up to 4 million cubic meters of potable water distributed from 19 wells via 19 pumping stations to four smaller waterworks. In Glandorf water passes through an oxidizer and 4 filters and daily checks are carried out to verify the high water quality.

Classic waterworks problems

Condensation on cold surfaces causes corrosion and is a general issue on water works. The condensation occurs on all cold surfaces such as pipes and filters since the air around the cold surfaces cannot contain as much water as the warmer ambient air.

If the formation of condensation is not stopped corrosions will arise immediately. At a relative humidity below 50% RH the corrosion process stops, whereas the corrosion rate is growing vigorously at humidities above 60% RH. The condensation formation on cold pipes and cold surfaces in general, increases the requirement for regular maintenance such as painting and cleaning, and makes it difficult to comply with the required hygiene standards on water works. Humidity levels beyond 70% RH also allows for mildew, mold and fungal and bacterial growth.

Waterworks should be kept free of microbial growth, as the facilities are considered as food supplying companies, and thus controlled by the Food Safety Authorities.

Also the electronic equipment used for control and monitoring of waterworks is sensitive to high humidity, and the high humidity can cause damage to the building structures themselves.

Dehumidification is the solution

The water temperature at the Glandorf facility is about 8°C as it enters the pipes and as the indoor temperature is always higher (min. 13°C), the moisture in the air precipitates as condensation on the cold pipes and filters.

The classical problems that arise in waterworks, was also known in the Glandorf facility, namely algae growth on steel surfaces, mold on building structures and wet pipes with corrosion where the paint peels off.

Facility Manager Frank Kurowski has already for many years prevented these problems by using dehumidifiers from Munters.

Munters dehumidifiers type MK are mobile refrigerant units and a number of dehumidifiers are permanently in use in the halls with oxidizer and filters. In addition, a few extra dehumidifiers are at hand for use during peak periods (e.g. on some summer days when the water content in the air is extraordinary high), and for quick drying after


  • No condensation
  • No mold and mildew growth
  • Reduced maintenance costs
  • Improved hygienic environment
  • Protection of electronic equipment


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