Generally, Ductless HVAC systems are best described as indoor, wall-mounted units with a compressor component that's outside. Ductless HVAC systems are mostly used in older homes that lack vents - these types of cooling systems don't have security concerns or leak air. For those looking to cut energy costs a ductless system is a great alternative.
Most HVAC experts agree that the most home lose 25% of its energy to ductwork. Eliminating ducts and using a ductless system can minimize the effort it takes to cool your home and save you on energy costs.