Direct Expansion (DX) Type of Central Air Conditioning Plant or System

In the direct expansion or DX types of air central conditioning plants the air used for cooling space is directly chilled by the refrigerant in the cooling coil of the air handling unit. The direct expansion or the DX type of central air conditioning system is usually used for cooling the small buildings or the rooms on the single floor. There are three main compartments of the DX type of central conditioning systems