A total of over 300,000 residential units have been refurbished since 1984. This has reduced carbon dioxide emissions by over 350,000 tons per year.
Refurbishment involves the reduction of a residential building’s heating demand by about 70%.
Energy consumption for heating, air conditioning and warm water in Vienna was reduced by about 20% between 2010 and 2015.
Distribution of energy sources for heating,
warm water and air conditioning (2015)
„Thewosan is the name of the City of Vienna’s funding scheme for integrated thermal energy renovations of residential buildings. The entire outside of the building is refurbished and innovative heating technology implemented. The City of Vienna relies heavily on the use of photovoltaics and solar thermal energy. This reduces heating demands and use of fossil fuels without reducing comfort. Carbon dioxide emissions from the building are thereby reduced in the long run. At the same time, the measures effect a rise in the apartments’ market value. Apply to wohnfonds_wien for Thewosan funding.“ Werner Auer, Head of Refurbishment, wohnfonds_wien