Common Types of Mini Split Ductless Systems?

All mini split ductless systems feature an external compressor and evaporator, with the cooling coil or coils and air handler mounted inside, on a wall or ceiling, with the two components connected with insulated refrigerant tubing. This is why they are called “split” systems. There are two basic ways that mini split ductless systems are differentiated.

The first characteristic is the number of zones the unit will cool. Single zone units feature an outdoor compressor and one cooling coil and air handler, along with an installation kit that includes 12-20 feet of tubing. Dual kits feature two internal coils, tri-zone units have three, and quad-zones offer four cooling coil/air handlers. The more zones are served by the unit, the more tubing, since the second, third and fourth coils may be placed further from the compressor. Additional tubing may need to be purchased for installation at considerable distance from the condenser/compressor.
The second common way mini-split ductless systems are categorized is the by the size, or capacity, of the compressor. Most single zone mini split ductless air conditioners use a ¾ ton, one ton, 1.5 ton or 2 ton compressor, which translates into 9,000, 12,000, 18,000, and 24,000 and BTU’s respectively. Dual zone models usually have at least a 1.5 ton compressor, while tri-zone and quad units use at least a 2 ton compressor.

Finally, some mini-split ductless air conditioning systems double as heat pumps, offering the ability to provide zone heating in cold weather.

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