A ductless mini-split system is a type of heating and cooling system that does not require ductwork. It consists of an outdoor unit and one or more indoor units, which are mounted on walls or ceilings. This design allows for flexible installation and efficient temperature control in individual rooms or zones. These systems are known for their energy efficiency, as they can heat or cool specific areas without wasting energy on unoccupied spaces. Additionally, ductless mini-split systems often include features like programmable thermostats and air filtration, enhancing comfort and air quality in homes and businesses.