Energy efficiency is becoming increasingly important in the age of climate change, and is one of the primary pillars of the energy transition. It can be defined as the optimal utilisation of the available primary energy. The less energy is required to power the compressors during refrigeration or heating, the more energy-efficient a process becomes. To accelerate the transition to climate neutrality, ENGIE Refrigeration has made energy efficiency in its refrigeration and heating systems a top priority. Both our chillers and our heat pumps have excellent efficiency values.