Site area 4037 m2
Building floor area 543 m2
Usable floor space 2421 m2
Mixed use

22·26 Lustenau

Lustenau I Austria


Though modern buildings tend to use less and less energy, the cost of servicing and maintaining them is growing ever higher.

An international landmark project, the new headquarter of Baumschlager Eberle Architekten sought to break new ground both in defining the firm’s signature style and in its association with a technical revolution that saw it dispense to a large extent with technology.

Die Aussenfassade vom Bürogebaeude Lustenau am Abend
Aussenansicht des Bürogebäudes in Lustenau bei Nacht
Fenster Detail der Aussenfassade in Lustenau hinter grünen Bäumen
Innenraum Bürogebäude Lustenau mit Holztreppe
Weißer Innenraum des Bürogebäudes in Lustenau


Visionary thinking for the future. Part universal prototype, part example to the world, 22·26 asks the question: What is the role for human intervention in an office building that has dispensed with all its heating, ventilation and cooling technology? The answer lies at 22·26, an HQ building set in Lustenau’s Millennium Park.

In a building that is a functioning part of its environment rather than just “architecture”, the choice of name is no accident: the ambient temperature inside is a constant 22°C to 26°C. The only heat sources it contains are there for other purposes, from the users themselves – every individual gives off an average of 80 watts of heat – to lights, computers and photocopiers, even coffee machines.

Living in harmony with the elements. 22·26’s perfect interior climate generates a perceptible feeling of wellbeing by harnessing the angle of the sun and the flow of the wind, just as its high-ceilinged rooms and clean, simple lines create a generous, light-filled atmosphere. Behind the space lies a technical vision based on the insights gained over more than 35 years of architectural practice at Baumschlager Eberle Architekten. 22·26 impresses on several fronts – its minimalist approach, its low construction and energy costs and a natural climate that produces a pleasant working environment.

Die Aussenfassade des Gebäudes in Lustenau, Österreich

22·26 was not designed with any particular target group in mind or in response to a particular brief; it is simply the expression of our architectural approach.


One building, four seasons, a host of ideas. In winter, the warmth generated by the building’s various heat sources is used to maintain an agreeable room temperature. Internally hinged, sensor-controlled ventilation panels in the windows open automatically as soon as the CO2 content or the temperature in the room starts to rise. During the heat of summer, the panels open at night to cool 22·26 with natural draughts. The air conditioning system’s sensors can also be overridden, enabling the ventilation panels to be operated manually.

Innenraum des Bürogebäudes in Lustenau mit Tischen und Stühlen

Innovation and revolution

The necessary level of temperature stability in the building is achieved by its own thermal mass thanks to exterior walls that consist of 38 cm of load-bearing and 38 cm of insulating brickwork. The walls are covered in a smooth lime-render inside and out, natural sunlight making the exterior finish harder and more dirt-repellent over time. 22·26 represents a first glance into the future of a new method, and with its high-quality materials and estimated lifetime of 200 years it will be around for some time to come. In the shorter term, however, 22·26 will no doubt continue to be seen as an exemplar of a new way of building.

Photo credits © Eduard Hueber



Wienerberger Brick Award: Grand Prize “Special Solution” | Wienerberger, Vienna, AT


Shortlist: The European Union Prize for Contemporary Architecture
Mies van der Rohe Award | Foundation Mies van der Rohe, Barcelona, ESP


Energy Globe Austria – Award for Sustainability
Energy Globe Foundation, Neukirchen / Altmünster, AT


German Design Award
Gold | Rat der Formgebung

Learn more about the method 22·26 and its applicability.
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