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A mobile air conditioning unit is a portable air conditioning system that can be moved from one location to another. It typically consists of a compressor, a condenser, and an evaporator, as well as a number of other components such as a fan, a thermostat, and a refrigerant.

Mobile air conditioning units are typically used in situations where a permanent air conditioning system is not practical or available, such as in a rented home or office, or in a workshop or garage.

They can also be used as a backup or supplemental cooling system in a home or business. Mobile air conditioning units are available in a range of sizes and capabilities and can be powered by electricity or by a gasoline generator.