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Green Building Worldwide |
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Case Study: Schlierberg Estate |
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Summary Location: Freiburg Owner/Developer: Rolf Disch Architect: Rolf Disch Contact: Year of Completion: 2002 Type of Building: Passive House Solar Townhouses Type of Construction: New Construction Size of Project: 60 townhouse units Location Description: Located at the top of the Vauban District Project Description: A group of plus energy houses that save energy through passive house design and produce a surplus of energy from their solar PV roofs. § Energy Production § High efficiency ventilation § Natural lighting § Non-toxic, natural finish materials § Pedestrian designed neighborhood |
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Financial Information Cost of Development: Financing: Rolf Disch Townhouse Cost/m²: €3,000-3,200 Hard costs for the materials and green installations: Expected utilities cost savings over average buildings each month: |
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These plus energy houses produce more energy than they use |
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Large windows in front let in lots of natural light and solar energy |
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Energy Considerations These plus energy buildings use a number of techniques to keep energy consumption low and energy production high. They are oriented to take advantage of passive solar gains as well as light gain. The overhanging PV roof supplies enough shade to keep the hot overhead summer sun from warming up the building. Additional heat/cooling loss is slowed by heavily insulated walls with penetrated only by small fenestrations in the east, west, and north facing exterior walls. Heat recovery is a standard piece of the ventilation system which keeps the house ventilated at all times. |
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Close-up of the inverters located at the base of the PV roof |
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Windows are high performance double glazed for their insulating qualities. The doors are also extra thick so energy loss is minimal through the biggest energy loss culprits. |
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Interior pictures of a plus energy townhouse |
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A pedestrian friendly neighborhood, any car owners must park their car in an underground parking garage nearby. |
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Air intake for the ventilation system |
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A view of the PV roof |