The office building ENERGYbase has been erected 2007 by the WWFF Business and Service Center GmbH. The building has 10,690 m² of gross floor area and hosts besides offices also laboratories and a university of applied sciences. Due to the exceptional shape of the facade and a wide range of other measures the heating demand of the building (3.87 kWh/m³y) is 72% below the Austrian Building code.
The following measures did contribute to reaching this figure:
- External walls - 26 cm insulation, 0.22 W/m²K
- Roof - 0.13 W/m²K
- Basement - 0.18 W/m²K
- Passive house windows - 0.75 W/m²K
- Optimisation of the building envelope (insulation, airthightness, windows, cold bridges)
- Partly wood construction
- Geothermal energy: for heating and cooling
- Mechanical ventilation with heat recovery and integration of plants for humidification
- Cooling: free cooling, solar cooling (innovative solar sorption system, which is being applied in Austria to this extent for the first time)
- Active and passive use of solar energy: solar thermal system (300 m²), PV system (400 m²), the shape of the south facade allows the passive use of solar energy (direct solar radiation into the building during the winter)
- Energy efficient lighting: the layout and the south facade concept make it possible to supply the entire building with daylight. Additionally special light directing blinds also channel daylight into the depths of the rooms.
- Use of sustainable building material
- Humidification with the so-called green buffer zones: four-storey high buffer rooms contain 500 Cyperus Grass type plants specially bred for humidification purposes. They function as closed moisture generating system which can be integrated as adjustable, precisely controlled and calculabel units into building engineering systems.
- Detailed monitoring of energy consumption, etc. within scientific projects
- Integrated planning process and use of simulation tools