A split unit system is a type of air conditioning system that is composed of two separate units. The first unit is located outside the building and is responsible for cooling the air and then sending it inside. The second unit is located inside the building and is responsible for distributing the cooled air throughout the space. This type of system is often used in commercial buildings and larger homes, as it is more efficient than a single unit system. The split unit system is beneficial because it allows for better temperature control and more efficient cooling. Additionally, it is more energy efficient than a single unit system, as it does not require as much energy to cool the air. The split unit system is also more cost effective, as it requires less maintenance and is easier to install.