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General Information:


  • Project name: Lodenareal
  • Project type: new building
  • Building type: apartment house
  • Building Typology: residential
  • Location: Austria, Region of Tyrol, City of Innsbruck
  • Year of construction: 2007-2009
  • Number of apartments: 361
  • Number of buildings: 6
  • Number of floors: 6


Building Size:
  • Gross building volume: 167.000 m3
  • Gross floor area: 35.000 m2
  • Gross heated floor area: 28.316 m2


Building Envelope:
  • Exterior wall: 1 cm exterior plaster; 24-30 cm ETICS (thermal insulation composite system); 18 cm reinforced concrete wall; 1,5 cm interior plaster; U-value = 0.13 W/(m2K)
  • Roof: 10 cm green roof; 1 cm sealing; 30-36 cm EPS-insulation ; 0,2 cm vapor barrier; 0,3 cm undercoat; 20-31 cm concrete ceiling (incline); U-value = 0.11 W/(m2K)
  • Basement floor / floor slab: Bonded parquet oak 1 cm; Screed 7 cm; Footfall sound insulation 3 cm; Composite fill 7 cm; Reinforced concrete ceiling 20 cm; Rock wool layer 26 cm or Rock wool layer 18cm and 7,5cm 3-layer insulation plate; U-value = 0.13 W/(m2K)
  • Windows and balcony doors: Triple-glazed windows k value = 0,6 W/(m2K); wood/aluminum frame U w-value = 0.72 W/(m2K); Entrance door U d-value = 1.8 W/(m2K)


Building service systems:
  • Ventilation: Heat exchanger with ground for heating/ cooling of the ventilation air. Through the pipe system the fresh air is supplied into bedrooms and living rooms. Outward-opening valves extract the outlet air from the bathroom and kitchen.
  • Heating: Central heating with a pellets and a gas condensing boiler.  Generated heat is transported into substations that heat the water and distributes the heat to the individual flats which have a heat exchanger for water heating and the regulator for the floor heating.
  • Photovoltaic installation: 1050 m2 of solar collectors installed on the roofs (3m2/flat).


Building service systems:
  • Annual heating demand: 14 kWh/(m2a)
  • Heating load: 9 W/m2
  • Primary energy requirement: 117  kWh /(m2a)
  • Air tightness: n50 = 0.18/h
  • CO2 emissions: Reduction of the yearly production of CO2by 680 tons
  • Renewable energy production: 1050 m2 of roof-mounted solar collectors supply 367.500kWh/year


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