Vienna, Austria

MULTI COMFORT design principles can be applied to any type of building (residential or non-residential, new build or renovation project) in any country or climate around the world.

Project identity card
  • Category: Renovation
  • Climate: Humid Continental Mild Summer, Wet All Year(Dfb)
  • Building type: MULTICOMFORT Multi family residential
  • Surface area: 77m2 m2
  • Architect: Robert Schild
  • Main contractor: Bmst. Christian Eible, Tulln
  • Original construction year: 1960
  • Year of renovation: 2010

This 1960s Vienna apartment was entirely renovated to meet the Passive House standard.

Successful application of MULTI COMFORT principles resulted in improved thermal and acoustic comfort and the delivery of a constant supply of fresh, oxygen-rich air.

As well as saving on energy costs, the apartment – which now sports new windows, as well as a new kitchen and bathroom – has significantly increased in value.

Highlights and challenges

The aim of this project was to renovate a fourth floor apartment, located within a six-storey multi-family residential building, to achieve the Passive House standard – paying particular attention to insulation and acoustic performance.


Energy balance*

  • Energy consumption: 13.9 kWh/m².yr
  • Energy balance: -112.1 kWh/m².yr
  • Energy production: 126 kWh/m².yr
  • Estimated CO2 savings: 7.847 kWh per year Equivalent to 1.883 kg CO2

Daylight Autonomy

  • :
  • Thermal performance

    • Average inside temperature: Winter: 21°C - 24°C
      Summer: 23°C - 25°C

    Airtightness under 50 Pa

    n50: 0.57 h-1

    Air quality

    CO2 concentration at between 600 and 1,000 ppm when the apartment is occupied by two people.

    Saint-Gobain products featured