Duct Free Systems
As suggested by the name, ductless cooling and heating systems work without any ductwork being involved. These systems consist of two separate units: an outdoor compressor and an indoor evaporator. The indoor unit is responsible for introducing cool and conditioned air into the living space, while the outdoor unit ejects the absorbed heat outside. Both these units are connected through a small hole in the wall. Installation is as simple as mounting the indoor and outdoor units, connecting the refrigerant lines, and making a few electrical connections.