The definition of a mini ductless split is a type of air conditioning system that uses a single outdoor unit to provide cooling and heating to multiple indoor units. This type of system is becoming increasingly popular due to its energy efficiency and flexibility. Mini ductless splits are ideal for areas where traditional ductwork is not possible or not desired, such as in apartments, condos, or older homes. The outdoor unit contains the compressor, condenser, and evaporator, while the indoor units are connected to the outdoor unit via refrigerant lines. The indoor units are typically wall-mounted and can be used to control the temperature in individual rooms or zones. Mini ductless splits are also relatively easy to install and maintain, making them a great choice for homeowners looking for an efficient and cost-effective cooling and heating solution.