Air conditioners and air conditioning units (AC) are devices that improve thermal comfort and indoor air quality through the distribution of conditioned air, often through a fan. A refrigeration cycle is most commonly employed to cool an occupied space. With the variation of size in AC units, air conditioning can improve the comfort of occupants in both domestic and commercial environments. However, air conditioners can also be used to regulate temperatures in spaces that subsume heat-producing electronics, as well as spaces with delicate products. When choosing an air conditioning unit for installation, users often choose between a traditional central AC unit and a more customizable ductless mini-split unit.
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