A split AC heat unit is a type of air conditioning system that is composed of two main components – an outdoor unit and an indoor unit. The outdoor unit contains the compressor, condenser, and expansion valve, while the indoor unit contains the evaporator and fan. The outdoor unit is responsible for transferring heat from the outside air to the refrigerant inside the unit, while the indoor unit is responsible for distributing the cooled air throughout the space. The two units are connected by refrigerant lines, which allow the heat exchange to take place. Split AC heat units are ideal for cooling large spaces, as they can provide more efficient cooling than a single unit. Additionally, the two units can be placed in different areas of the space, allowing for more precise temperature control. Split AC heat units are becoming increasingly popular due to their energy efficiency and ability to provide precise cooling.