Anergienetz BWB Altenrhein

BWB heats Altenrhein village centre


BWB-Altenrhein cools its anodising plants with water from Lake Constance. Now the heated lake water is used to heat the neighbouring residential quarter. Currently, 55 flats are heated with the waste heat from the anodising plant and their own heat pump. The next step will be to connect the Altenrhein school building to the "Altenrhein Anergie network", as the potential of the project has not yet been exhausted.

The heated lake water flows under the newly designed cycle path on Dorfstrasse into the neighbouring residential area.

The connection to the water network during construction in summer 2022

«For this project, all parties involved had to break new ground and accept a certain risk. Now it has turned into a win-win situation,» says Beat Bosshart, local councillor for the communities of Thal, Altenrhein and Staad.

View of the closed water circuit of the anergy network in the basement of BWB-Altenrhein AG.

An anergy network is a network of pipes for transporting heat at a low temperature level. Smaller temperature differences can thus already be used sustainably.

«Using the waste heat from our production processes makes great sense in the current climate debate,» says Norbert Gächter, Managing Director of BWB-Altenrhein AG.