The definition of a ductless split air air conditioning system is a type of air conditioning system that does not require the use of ducts to cool a space. Instead, it uses an outdoor condenser unit and one or more indoor air handlers to provide cooling to the desired area. The outdoor condenser unit is connected to the indoor air handlers via refrigerant lines. This type of air conditioning system is ideal for homes or businesses that do not have existing ductwork, as it is a cost-effective and efficient way to cool a space. Additionally, ductless split air air conditioning systems are known for their energy efficiency, as they allow you to control the temperature of individual rooms or areas, so you are not cooling unused space. This can result in significant energy savings over time. Furthermore, ductless split air air conditioning systems are also known for their quiet operation, making them a great choice for those who want to enjoy a peaceful environment.