This tight control unit technology utilises two distinct mediums to dissipate heat created in the datacenter. It is a mix of a Direct Expansion (DX) unit and a precision air conditioner with chilled water. The system is comprised of a single interior unit that holds the cooling coil, the filter, the humidifier, the heater, and the blower fan. Indoor units are equipped with two cooling circuits: DX and chilled water. Chilled water circuit connected to chilled water supply, which transfers heat via chilled water. While the DX circuit is connected via copper refrigerant piping to the external air-cooled condenser. With the aid of refrigerant, heat is transmitted to the outside. Any one of the cooling circuits may be used as the default, while the others may be used as a standby. Or We can programme the dual fluid server room air conditioner's cooling circuits to operate on a timetable.