Climate control systems are a standard feature in most modern vehicles. in addition to fans, many cars and trucks include an on board cooling mechanism. Meanwhile frieght and hauling trucks may go one step further and have a refrigerator system to maintain the proper temperature for cargo.
As with all auto parts, this means that qualified workers are needed to service them. Automotive workers of all kinds have a strong knowledge of all the parts that make up a car, but chemicals involved in refrigeration, like freon, require special handling and certification that varies by province. Without proper handling this can result in environmental damage via ozone depletion.
Meanwhile, part of the day to day work of an air conditioning service technician is cleaning, repairing and installing climate control systems.