What characterizes a ductless mini-split system?

A ductless mini-split system is characterized by its use of an outdoor compressor unit combined with one or more indoor air-handling units. This configuration allows for efficient temperature control in specific zones or areas of a building without the need for extensive ductwork. The outdoor unit is responsible for the heat exchange process, while the indoor units distribute conditioned air directly into the living space. This design offers flexibility in installation and can efficiently heat or cool individual rooms or designated areas, making it suitable for residential use as well as commercial spaces.

The extensive ductwork mentioned in another choice is a defining feature of traditional central HVAC systems, which contrasts with the ductless mini-split's straightforward installation process. Additionally, the system's capability extends beyond just heating, as it can provide both heating and cooling functions, thereby making it versatile for year-round comfort. Finally, while these systems are used in both residential and commercial settings, they are not limited to commercial use alone. Thus, the choice correctly emphasizes the unique dual-unit system that defines ductless mini-splits.