As the world try to reduce their use of HFCs, with even USA and China finally signing up to the Kyoto agreement HFCs, widely used as refrigerants, do not damage stratospheric ozone but, like CFCs and HCFCs, they are powerful greenhouse gases. This has lead to some innovative steps being taken by early adopters to upgrade commercial refrigeration equipment in order to benefit the environment, enjoy energy savings and help towards the sustainability goals of large organizations. There’s a large element of "going green” too. In an attempt to bring advanced technology, environmental stewardship and cost savings to their water cooling and air handling systems, large organisations are upgrading thier chillers and installing new, advanced, energy efficient components, controls and non-ozone depleting refrigerants.