Siemens Smart Infrastructure has installed its fluorine gas-free, medium-voltage switchgear NXPLUS C 24 blue GIS at Iberdrola. The climate-friendly insulating gas Clean Air with a global warming potential <1 replaces harmful fluorine gases and consists exclusively of natural components of ambient air. The power distribution solution enhances sustainability and climate protection for Spanish utility Iberdrola.The Merindades substation, which supplies power to the industrial area of Villarcayo in Burgos, is equipped with fluorine gas-free Siemens NXPLUS C 24 medium-voltage switchgear. The 24 kV, 25 kA, 1250 A switchgear with Clean Air technology is part of the new climate-friendly blue GIS portfolio from Siemens Smart Infrastructure. This innovation not only eliminates SF6 as an insulation medium, but any gas mixture based on fluorine. Instead, Siemens uses the insulation gas Clean Air, which consists exclusively of natural elements from the ambient air and has a global warming potential of less than one. NXPLUS C 24 retains the proven benefits of gas-insulated switchgear, such as simple and safe handling during operation and a compact size. In addition, the environmentally-friendly systems offer straightforward end-of-life recycling.