Energie-Modell Zürich is a grouping of large companies that have undertaken to the Canton of Zurich and the Swiss federal government to improve their energy efficiency by a total of 43% by 2020, at the same time as reducing their CO2 emissions. SIX has been an active member of this group for 12 years, alongside firms such as UBS, Swiss Re and Zürcher Kantonalbank.
Energy efficiency is an important issue for a technology company like SIX, in the interests of environmental protection, but also on simple cost grounds. The members of SIX Real Estate Management unit therefore constantly evaluate how and where they can optimise the technical infrastructure in order to cut energy use.
For example, SIX has in the last few years upgraded the entire cooling system in its office buildings and data centres. The outdated wet coolers have been replaced by efficient new hybrid coolers. As a result, SIX is today able to produce around half of its annual cooling energy without the use of power-hungry chillers. At the same time, SIX is now using chillers with the natural coolant ammonia.