Heating and Cooling Technicians

Many industries today depend on carefully controlled temperature and humidity conditions while manufacturing, transporting, or storing their products. Many common foods are readily available only because of extensive refrigeration. Less obviously, numerous chemicals, drugs, explosives, oil, and other products our society uses must be produced using refrigeration processes. For example, some room-sized computer systems need to be kept at a certain temperature and humidity; spacecraft must be able to withstand great heat while exposed to the rays of the sun and great cold when the moon or earth blocks the sun, and at the same time maintain a steady internal environment; the air in tractor trailer cabs must be regulated so that truck drivers can spend long hours behind the wheel in maximum comfort and safety. Each of these applications represents a different segment of a large and very diverse industry.

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