A mini-split system is a type of heating and cooling system that consists of an outdoor compressor unit and one or more indoor air-handling units. These systems are known for their energy efficiency and flexibility, allowing homeowners to control the temperature in individual rooms or zones. They do not require ductwork, making them a popular choice for homes without existing ducts. Mini-split systems use refrigerant to transfer heat between the indoor and outdoor units. During the summer, they remove heat from the indoor air, cooling the space, while in winter, they can reverse the process to provide heating. This versatility makes them suitable for various climates and building types.