Like central A/C, these units have a split design but without an elaborate system of ducts. The split system (also called a mini-split, ductless split, or duct-free system) has at least one unit inside the home (this is the evaporator) and one outdoor unit (the condenser). Small tubes of refrigerant run from the outdoor unit to the indoor units – these are also known as line sets. Indoor units can be wall or ceiling mounted. Ductless splits can be used to cool one zone or multiple zones applying two to four indoor units to one condenser – the indoor units can all be used independently of each other.
Ductless split systems are available in a variety of configurations through the utilization of different components. When assembling a complete system, it is important to understand the various equipment options as identified in the table below.
|Wall Unit||Indoor fan coil unit that hangs on a wall|
|Ceiling Cassette||Indoor fan coil unit-recessed in ceiling with exposed grille|
|Single Zone Condenser||Outdoor condenser paired with single zone indoor unit|
|Multi-Zone Condenser||Outdoor condenser that can serve up to four indoor units|
|Heat Pump||Includes a reversing valve to provide heat|
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