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When was air conditioning invented?

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Quick Answer

Modern electro-mechanical air conditioners were first created in 1902 by Willis Carrier. He created the device to improve manufacturing process control in a printing plant.

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Full Answer

The concept of air conditioning has existed since the second century in China. An inventor named Ding Huan created a rotary fan with seven wheels, each almost 10 feet in diameter. The fan had to be powered by hand. This fan inspired later imitators that were turned by water wheels. In the modern era, fans were frequently used with blocks of ice for cooling. Benjamin Franklin and Michael Faraday both discovered that volatile liquids like alcohol and ammonia produce a cooling effect when they melt. These discoveries made it possible for Carrier to create a machine that cooled without adding humidity.

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