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City Hall Freiburg

Building Details

Building NameCity Hall Freiburg Construction / refurbishment date01/01/2017 Building Size
Building Typeother Address Fehrenbachallee Freiburg Baden-Württemberg 79106 Germany Region europe

Performance Details

Net Zero Operational Carbon

Buildings or developments that display best practice outcomes in energy efficiency, are powered by renewable energy, and as such have been verified and certified as "net zero energy and/or carbon" projects.

Qualification criteria: DGNB Climate Positive Certificate level: Net EUI: Net RPI: Net Offset Ren Energy Src: Net Offset Details: Net Verification Year:

Additional Details

The university city of Freiburg is home to an innovative city hall that is now the biggest surplus-energy building in Europe. The edifice boasts outstanding thermal insulation that allows for low-temperature heating and high-temperature cooling. To minimise energy demand, the building is fitted with a ventilation system that uses heat recovery. The building is heated and cooled efficiently by using energy in the ground water. A heat pump operates the heating system and a plate heat exchanger is used for cooling. The roof and areas of the facade exposed to direct sunlight are fitted with high-performance solar energy panels, which also shield the building from the sun. The overall result is an energy concept that enables the building to make good use of renewables and thus generate more energy than it requires for heating, cooling, ventilation and lighting. This is because the photovoltaic units produce more electricity than the building needs. The building also reacts to network requirements, so it can feed surplus electricity back into the grid.

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Submitter's Details

OrganisationDeutsche Gesellschaft für Nachhaltiges Bauen - DGNB e.V. Member of GBCGerman Sustainable Building Council

“The university city of Freiburg is home to an innovative city hall that is now the biggest surplus-energy building in Europe.”