The LEED® certification was developed in 1998 by the US Green Building Council®. The USGBC® is an international, independent organization based in Washington DC, USA.
The evaluation is carried out by the following criteria:
1. Sustainable Sites
The central location of Stafa Tower Vienna in the heart of Vienna and the excellent access to public transport contribute positive to sustainable (CO2-reducing) mobility.
For the roof surfaces, bright and reflective materials are used in combination with a green roof, in order to reduce the urban heat island effect.
2. Water Efficiency
By using water-saving fixtures and toilets, the water consumption of the entire building is reduced by about 40%. This saving has a positive impact on our natural water resources and helps reduce operating costs.
3. Energy and Atmosphere
The thermal rehabilitation of the building envelope and the modernization of the building engineering systems reduce the energy consumption by 26% in accordance with the LEED® requirements. The energy consumption acc. to energy certificate is even reduced by 46%.
4. Materials & Resources
Attention to the selection of materials was paid, so that they are on the one hand regional and on the other hand have a high recycled content. As a result, on the one hand CO2 can be saved due to shorter transport routes to the construction site and on the other hand degradation of natural resources can be reduced.
In addition great importance has been attached to the use of FSC certified wood (Forest Stewardship Council, certifying wood from sustainable forestry) in order not to support the eradication of tropical forests.
5. Indoor Environmental Quality
When selecting adhesives, wall- and ceiling-coatings attention was paid to a low VOC content (Volatile Organic Compounds can cause allergies, irritations, fatigue, headaches and impaired mental performance).
Also the supply of fresh air in the building is higher than average.
6. Innovation in Design
The buildings LEED® score also benefits from other innovative measures. These include for example the excellent access to public transport, reuse of the historical building, green education and the avoidance of pesticides.