Jet air air conditioners

Air conditioning (often referred to as AC, A/C, or air con [1] ) is the process of removing heat and moisture from the interior of an occupied space, to improve the comfort of occupants. Air conditioning can be used in both domestic and commercial environments. This process is most commonly used to achieve a more comfortable interior environment, typically for humans or animals; however, air conditioning is also used to cool/dehumidify rooms filled with heat-producing electronic devices, such as computer servers , power amplifiers , and even to display and store artwork.

In the most general sense, air conditioning can refer to any form of technology that modifies the condition of air (heating, cooling, (de-)humidification, cleaning, ventilation, or air movement). In common usage, though, "air conditioning" refers to systems which cool air. In construction , a complete system of heating, ventilation , and air conditioning is referred to as heating, ventilation, and air conditioning ( HVAC – as opposed to AC ). [3]

Since prehistoric times, snow and ice were used for cooling. The business of harvesting ice during winter and storing for use in summer became popular towards the late 17th century . [4] This practice was replaced by mechanical ice-making machines.

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