Data centres house complex electronic equipment which uses and dissipates large amounts of energy, most of which in the form of sensible heat. International regulatory standards prescribe the strict and precise control of the thermo-hygrometric parameters within such systems: servers operating outside the designated limits can lead to rapid shutdowns and damage to the equipment. These requirements are met by specially-designed units for data centres, which operate continuously, performing all the necessary operations in an efficient, reliable and flexible manner. Aermec offers a variety of differing solutions, in accordance with the specific characteristics of each data centre, the geographical conditions and the user's requirements: these range from chilled water systems, combined with chillers optimised for operation with high water temperatures, to direct expansion systems and indirect evaporative coolers applying adiabatic principles.