A ductless mini-split consists of an outdoor compressor/condenser and one or more indoor air-handling units connected by a small conduit (refrigerant lines, power, and drain). No ductwork required.
They're ideal for additions, garages, finished basements, older homes without existing ductwork, and rooms that are always too hot or too cold. Each indoor unit is independently controlled, so you only condition the spaces you're using.
Installation typically takes one to two days per zone. The outdoor unit sits on a pad or wall bracket; the indoor unit mounts high on a wall or ceiling. The conduit runs through a 3-inch hole in the exterior wall.
Brands like Mitsubishi, Daikin, and Fujitsu offer cold-climate models that heat efficiently even when outdoor temperatures drop below 0°F. DMES LLC installs and services all major brands.
Information provided is general guidance for homeowners. Every home is different — contact DMES LLC for advice specific to your situation.