There are various types of air conditioning systems used in data centers, including traditional CRAC (Computer Room Air Conditioner) and CCU (Computer Cooling Unit) systems designed with environmental layout considerations, utilizing raised floors and ceilings for airflow management. Advanced InRow systems, featuring hot and cold aisles, optimize the cooling of server exhaust air. These systems can be designed using direct expansion or chilled water.
In advanced data centers, free cooling units and direct (DEC) or indirect evaporative cooling (IEC) systems are increasingly employed. In such facilities, operational continuity and energy efficiency optimization are of utmost importance.