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- The world’s first Passive House, Darmstadt-Kranichstein, Germany
- as well as by a minimal heating of incoming fresh air((We show at another place that this is possible i... * ventilation controls were developed based on air quality guidelines, * new specially insulated ... a subsoil heat exchanger for preheating the fresh air were used. The house has a very good thermal ins... **Heat\\ recovery\\ ventilation** | Counterflow air-to-air heat exchanger;\\ Located in the cellar (a