A fresh water station is a device for the preparation of domestic hot water (c.w.u.) in a flow-through manner - that is, heating water on demand without storing it in a large tank. In practice, this means that the water is heated when the tap is turned on, passing through a heat exchanger supplied with water from the heating system. This design ensures that you get fresh water every time, without prolonged storage at temperatures that promote microbial growth. As a result, the standard of hygiene c is significantly raised.w.u. - flow-through water preparation effectively protects against the proliferation of bacteria such as Legionella. It is therefore a hygienic alternative to the traditional boiler or hot water cylinder.