Article: Air Conditioning

AIR CONDITIONING

AIR CONDITIONING. Mechanical air conditioning made its first appearance at the turn of the twentieth century. Defined as the control of temperature, humidity, cleanliness, and distribution of air, it largely grew out of successful efforts to control humidity levels indoors. Systems were custom designed for each installation and were used to either add moisture to the air or remove the excess depending upon the application. Two basic types of air conditioning were marketed: comfort air conditioning for establishing the optimum conditions for human comfort, and process air conditioning for setting the most favorable atmospheric conditions for industrial processing.

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