Austria, Vienna, Uniqa Tower One third of the building's energy consumption is provided for by a heat pump and geothermal heating The building received the European Union GreenBuilding label It is the first building in Austria and one of the first buil. Austria, Vienna, Uniqa Tower One third of the building's energy consumption is provided for by a heat pump and geothermal heating The building received the European Union GreenBuilding label It is the first building in Austria and one of the first buildings in Europe to bear the label