A heating and cooling split system is a type of HVAC system that is used to regulate the temperature in a home or business. It consists of two main components: an outdoor unit and an indoor unit. The outdoor unit is responsible for providing the heating and cooling power, while the indoor unit is responsible for distributing the conditioned air throughout the building. The two units are connected by refrigerant lines, which transfer the heat or cool air from one unit to the other. The outdoor unit is typically located outside the building, while the indoor unit is usually installed in the attic or basement. Split systems are often used in larger buildings, as they are more efficient than single-unit systems. They are also easier to install and maintain, as the components are separated. Split systems are great for regulating the temperature in a building, as they are able to provide both heating and cooling, depending on the season.