Boarding School Föhrenbühl, Germany

Föhrenbühl - home, school and place of residence for about 130 children and young people has redefined the use of water. The new construction and renovation measures there changed previous habits.

A cistern for the entire construction project was built in advance. It collects the continuously accumulating Drainage which is coming down the hill. This way, Föhrenbühl saves about 50 % of the mains water in the connected houses. The drainage water can be used directly for garden, toilet and washing machine without treatment. Each new house was given its own Maxima rainwater unit from WISY AG, free standing installed in the basement. It contains an submersible pump in a 100 Liter intermediate tank. This puimp delivers water with pressure to the Service water taps in the house.

The water level in the Intermediate tank is automatically controlled. If needed it is refilled with water from the central cistern. Each house has its own connection pipe to the cistern and its own submersible pump standing inside the cistern. That second submersible pumps refill the Intermediate tanks in the houses. If, for an exceptional reason, the cistern does not provide enough water, the Maxima Rainwater unit switches automatically over to the use of mains water, until the cistern is filled again.