How the 2226 concept works

The 3 components

  1. The 2226 building itself – clever architecture with a solid structure and the high thermal storage capacity that goes with it, coupled with temperature-compensating materials and surfaces
  2. The 2226 building use – the people for whose well-being the building was designed and who, together with electrical devices and lighting, also serve as a source of heat
  3. The 2226 Operating System –  the intelligent building control system automatically regulates building temperature, CO2 content and air humidity via ventilation panels

The 2226 building - empty

Temperature behaviour

Temperatures inside the building run several weeks behind those outside and fluctuate much less, even with extreme changes in outdoor temperature. This slow reaction owes to the massive structure’s high thermal storage capacity.

The 2226 building in use - without a building control system

Temperature behaviour
While indoor temperatures are significantly higher – a consequence of heat generated by people, equipment and lighting – they are still periodically lower than 22ºC or higher than 26ºC.

The 2226 in use - with 2226 Operating System

Temperature behaviour
​​​​​​​Temperatures here are a constant 22 to 26 ºC; the 2226 operating system regulates climate and CO2 content via sensor-controlled ventilation panels. Even extreme conditions are compensated automatically: a building that is very cold or temporarily not in use will turn lights on as a back-up, while night cooling is switched on in cases of extreme heat. Excessive CO2 is expelled with automatic rapid ventilation.

With efficiency in every respect

Our pioneer project

The 2226 Lustenau, an officebuilding completed in 2013 – quantifies the concept’s efficiency benefits in concrete terms. 2226 Lustenau is highly energy efficient, but it also sets new standards in cost- and space efficiency as compared to a standard building.

Energy efficiency

With 45 kWh/m2, its annual energy consumption is reduced to one-third.

Source / Benchmark: comparison SIA 2024 vs. measured values 2226

Space efficiency

Building services require just a few square metres of space.

Source/Benchmark: Experience

For a stable investment


Further criteria for a stable, sustainable investment include more than just traditional construction methods and materials that have been tried and tested for generations; a building also needs a certain neutrality of use. Open floor plans between the façade and the service core at the structure’s centre enable easy adaptation for any number of scenarios.

Life Cycle Costs (LCC)

Life Cycle Costs (50 years) of a 2226 building are half those of a standard building.

Source / Benchmark: DIN Lebenszyklus-Management, A. Pelzeter

Computational model per m2 for 50 years.

Type of cost 300: building excavation, foundation, exterior walls, interior walls, floor slabs, roofs, structural installations.

Type of cost 400: technical systems, heating systems, ventilation systems, heavy current, telecommunication systems, water, sewage, gas, conveyor systems, specific installations, automation