What is the definition of a mini split? A mini split is a form of a ductless air conditioning system that is designed for cooling and/or heating smaller spaces. It is composed of two parts: an outdoor compressor/condenser and an indoor air-handling unit. The outdoor part is mounted on the exterior wall or roof of the building, while the indoor part is mounted inside. The indoor air-handling unit is sold in a variety of sizes and styles, with most models ranging between 6,000 and 36,000 BTUs. The outdoor unit is typically installed at the same time as the indoor unit, and the two parts are connected by copper tubing and electrical wiring. The mini split’s efficiency is higher than traditional central air conditioning systems because it does not need ducts and is designed to provide zoned temperature control. They are also quieter than traditional air conditioners because the compressor is located outside. Although the mini split offers many benefits, it is not the best