What defines a ductless A/C system?

A ductless A/C system is characterized by its ability to cool spaces without the need for extensive ductwork, which is a defining feature of traditional central air conditioning systems. This design allows ductless A/C units, also known as mini-split systems, to operate efficiently in various settings, especially in homes where duct installation is impractical or too costly.

These systems consist of an outdoor compressor unit and one or more indoor air-handling units, which can be mounted on walls or ceilings. The two components are connected by refrigerant lines, allowing for effective cooling and heating without the air ducts. This feature also contributes to a more straightforward installation process and greater flexibility in terms of where cooling is provided.

In contrast to the other options, while some systems may require different types of refrigerants or be suited for specific environments like commercial spaces, these traits do not fundamentally define what makes a ductless A/C system unique. The absence of ducts is the key attribute that distinguishes these units from traditional air conditioning systems.