A ductless split unit is a type of air conditioning system that is designed to provide efficient cooling and heating without the need for ductwork. This type of system is often used in homes and businesses that do not have existing ductwork or where installing ductwork would be too expensive or impractical. The ductless split unit consists of two main components: an outdoor condenser and an indoor air handler. The outdoor condenser is responsible for transferring heat from the outside air to the inside air, while the indoor air handler is responsible for distributing the cooled or heated air throughout the space. The indoor air handler is typically mounted on the wall or ceiling and is connected to the outdoor condenser with a set of refrigerant lines. This type of system is ideal for areas where zoning is desired, as each indoor air handler can be controlled independently. Ductless split units are also energy efficient, as they do not require the use of ducts to distribute air, which can reduce energy costs.