The power usage effectiveness (PUE) value represents the total power consumed by a data centre relative to the power consumed by the IT infrastructure used there. In the year under review, our data centres had an average PUE value of 1.34 (see graphic). We strive to improve this figure all the time. Our most innovative data centre is located in Berne Wankdorf. This is cooled with recirculated air and rainwater and achieved a PUE value of 1.31 in 2022. Its waste heat of 3.4 GWh flows into the heating network of the city of Berne.
In order to further boost the efficiency of our data centres, we are focusing primarily on server virtualisation. This means that less IT infrastructure and therefore less energy are required for the same performance.