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.
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.
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.
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.
With 45 kWh/m2, its annual energy consumption is reduced to one-third.
Source / Benchmark: comparison SIA 2024 vs. measured values 2226
The construction costs of a 2226 building are one quarter lower.
Source/Benchmark: Comparison of construction cost index for actually billed costs of 2226 Lustenau without deductibles, billed costs for 2226 incl. deductibles of 1,240 €/m2 of gross floor area, per m2 of gross floor area, without planning costs
Building services require just a few square metres of space.
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 (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 incl. 1.5 % interest and 5 % increase in energy prices.
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