The exact location of the Austrian pilot project is not yet confirmed. Information will be available soon.

The Austrian pilot project will take place in Liezen, 110km north of Graz, in the region of Styria. The building contains 20 apartments in a climate zone with large temperature differences between winter and summer.

Climatic zone (Köppen): Dfb (Warm-summer humid continental climate)

Weather characteristics: ​

  • Colder winters (average T in January: -5,5 ºC). ​
  • The coldest winters among the three locations, with high temperature difference between winter and summer months.

Building description

Build up between ~1940.
20 dwellings in 5 sections
3 and 4 room apartments
avg. of 56m² per dwelling. ​

Ownership: The building is owned by the non-profit social housing company (GWS)

Space heating system: Varies from apartment to apartment: a) via oil or wood stove on apartment level or b) via gas heaters on apartment. Radiators are used in the apartments with a supply/return temperature of 80/60ºC.​. 

DHW System: on apartment level by electric water heaters or gas boilers​.

Existing control and monitoring System: no monitoring system installed at the moment. Basic control system in each dwelling: water supply controlled by ambient thermostats (on/off control strategy).

Space heating energy consumption: ~44,8 MWh/a​ rwsp. ~40 kWh/m2​

DHW energy consumption: 29,1 MWh/a​ resp. 26 kWh/m2​