What is a ductless split system?

The term "ductless split system" is used to classify air conditioning systems that do not utilize duct work and also have two distinctive parts, an interior unit and an exterior unit. Conventional heating and cooling systems, as might be found in a common Michigan home utilize duct work. "Window shakers" or window mounted air conditioners do not have two distinctive components, but have only one self contained unit. There a few types and different configurations of ductless split systems, but they all have the common characteristic of not utilizing duct work, and having at least two primary components connected to each other by piping and electrical wiring. Ductless split systems are commonly used where it is not practical or astatically pleasing to install duct work.