Heat pumps can be connected to the ductwork of the building to provide conditioned air to the entire home using the vents or ducts. These types of units are known as ducted systems. These are good options for homes with existing ductworks. Additionally ductless heat pumps, typically consist of one or multiple indoor units (heads) connected to an outside unit (compressor). These are great options for homes without existing ductwork or heating and cooling of new additions to a house.