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The project ‘Hauffgasse 37-47’, completed in 1987, is a large housing block with 485 flats. It is supplied by a micro-district-heating-grid and currently fired with natural gas. The objectives were mainly focusing on the reduction of energy demand and the integration of renewable energy sources.
The project ‘Hauffgasse 37-47’ is a large housing block with 485 flats, completed in 1980 and owned by BWSG a ‘Limited Profit Housing Association’ (LPHA). With more than 53,000 m², it is the main refurbishment project undertaken in Vienna within SMARTER TOGETHER. The objectives were mainly focusing on the reduction of energy demand and the integration of renewable energy sources.
Main Measures implemented for the reduction of energy demand
▪ Refurbishment of the building envelope from 126kWh/m²a to 45kWh/m²a of final energy demand for heating and warm water
▪ Installation of highly efficient building equipment: lighting system (indoor and outdoor), elevator, HVAC components as well as new monitoring equipment
▪ Redesign and refurbishment of common open spaces, in particular the community centre by increasing its attractiveness and opening it up for inhabitants of the neighbourhood
▪ Redensification by construction of additional flats on top of the buildings (75 flats, 5.000 m², not included in the BEST table)
The project Hauffgasse 37-47 is supplied by a micro-district-heating-grid currently served from a gas-based heat plant, operated by the KWG
▪ Redesign and refurbishment of the heat transfer station and the hot water generation for the three separate heat sub-stations
▪ Hydraulic balancing of the heating system using a systematic approach to reduce energy consumption and system temperatures
▪ Installation of about 350m² of solar thermal energy on the roof of the buildings
▪ Feed-in of the solar thermal energy into the heat sub-stations in combination with buffer…
The preparation phase already started in 2013 with a tenants information and participation process. From that time, many activities were organised by wohnbund:consult, an enterprise specialised on communication and participation activities in housing estates, together with the building owner BWSG. Furthermore, an information box ‘on site’ and a website for all questions and needs concerning the planned refurbishment were implemented, so that all information and results were documented and accessible for everyone. On this basis – of a trustful communication on eye-level – the further participation of the tenants within Smarter Together was possible.
