Whereas traditional heat pumps and central air conditioning systems force cooled and heated air through ducts, mini-ductless systems deliver air directly to specific areas of a house. These systems combine a small outdoor unit and one or more indoor units. These units require nothing more than mounting capabilities and an electrical connection. Sometimes referred to as split systems, multi-split systems, or split-ductless systems, mini-ductless cooling and heating offers home and business owners a cost-effective way to replace inefficient window units, space heaters, and electric baseboard heaters. They can be installed in home additions, new construction, condominiums, and apartments, or to improve temperature control in specific rooms. Ductless systems can be added to buildings that currently use ducted forced-air systems.