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1. Modern Low-Energy-Home in the southern Eifel
2. Remodeling of a 70s home in Kaiserslautern
3. Detached Low Energy House, Ludwigshafen, Germany
4. Membrane structure, Beijing, China

Photos from the site

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No lightweight construction underground:
Concrete foundations for the cables 1,40m * 1,40m (4.6 ft)