Also called a data center chiller, it's a cooling infrastructure used in a data centers and industrial facilities. A chiller cooling system removes heat from one element and deposits into another element. In large data centers the chiller is used to cool the water used in their heating, ventilation and air-conditioning units. Due to the amount of heat produced by many servers and systems in a data center, the chiller cooling system would be operational around-the-clock. As such, a large percentage of the electricity consumed in a data center is used by the chiller.