79100 Freiburg-Vauban (project no. 3): zero wastewater house, passive house standard, 20 WEs, energy saving concept, biogas CHP, solar power system, alternative sanitation concept, completion: 1999
halogen-free plumbing
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79100 Freiburg-Vauban (project no. 3): zero wastewater house, passive house standard, 20 WEs, energy saving concept, biogas CHP, solar power system, alternative sanitation concept, completion: 1999
