What is the difference between spot coolers, portable air conditioners (“portables”) and mini-split or ductless air conditioners?

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What is the difference between spot coolers, portable air conditioners (“portables”) and mini-split or ductless air conditioners?

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Air-cooled spot cooling units, spot coolers and portable air conditioners are the same. These units appeared on the market in the early 1980’s to provide cooling for factory workers, hospitals, data rooms, high rise buildings and anywhere extra cooling is needed. Portable air conditioners or spot coolers are practical, self-contained units on wheels for cooling a spot, room or area where IT equipment, people or other assets need cooling or humidity removal. Portables are available in many capacities and voltages from about 1 Ton to about 10 Tons. If it is impossible or impracticable to exhaust the hot air created by the a/c unit to the outdoors, spot coolers typically include a duct kit for directing the warm air into the ceiling space in a commercial building. These units are unsuitable for residential applications. If larger units are needed for the job, exterior units are required because doors create capacity limitations. A “mini split air conditioner” is a ductless split unit. The

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