Yes, the VRF (Variable Refrigerant Flow) air conditioning system is a direct expansion type of system.
In a VRF system, refrigerant is used as the cooling and heating medium, and it directly flows between the outdoor condensing unit and multiple indoor fan coil units or air handling units. The system adjusts the flow rate of refrigerant to match the heating or cooling demands of different zones or rooms within a building. This allows for precise temperature control and energy efficiency.
Direct expansion refers to the process in which the refrigerant directly evaporates and condenses within the indoor units without the need for any intermediate cooling medium, such as water or air. This direct transfer of heat between the refrigerant and the indoor space is what makes it a direct expansion system.
VRF systems are popular in commercial buildings and large residences due to their flexibility, zoning capabilities, and energy-saving potential.