What is the definition of a mini split? A mini split is a type of air conditioning system that is composed of two parts, an outdoor condenser unit and an indoor air air handler unit. The two parts of the system are connected with two copper refrigerant lines and can provide cooling to a single zone of a home or business. The mini split system is more efficient and cost-effective than traditional air conditioning systems, as it does not require ductwork for installation. This system can be mounted on an interior wall, ceiling, or floor and is an ideal solution for homes with limited space or oddly shaped rooms. Mini split systems also give the user more control over the temperature in individual rooms, as they can be set to different temperatures and operate independently of each other. Additionally, mini split systems are quieter than traditional air conditioning systems, making them a great choice for bedroom or home office spaces. Overall, mini splits are a great option for cooling a single area of a home or business.