Ductless air-conditioners have many potential applications in residential, commercial, and institutional buildings. The most common applications are in multifamily housing or as retrofit add-ons to houses with “non-ducted” heating systems such as hydronic heat or baseboard heaters. They are an excellent choice for room additions and small apartments, where extending or installing ductwork (for a central air-conditioner or heating systems) is not feasible.
Like central systems, mini splits have two main components: an outdoor compressor/condenser, and an indoor air-handling unit. A conduit, which houses the power cable, refrigerant tubing, suction tubing, and a condensate drain, links the outdoor and indoor units.