The rest worked for various industries, showing just how far a reach these types of systems have on the nation. Approximately 15% of technicians are self-employed. Close to 50% of them were employed by cooling and heating contractors. More than 249,000 positions were held by heating, air-conditioning, and refrigeration technicians in 2002. Climate controls makes the simply impossible, possible. We rely on cooling and heating devices help regulate the temperature, humidity, and air quality in residential homes, commercial locations, and industrial facilities. Without technicians the residents of the Imperial County would suffer from heat exhaustion in the summer, while those in Alaska would freeze without heating food and medicine would spoil without refrigeration. Technicians repair, maintain, and install heating, air-conditioning, and refrigeration systems. Someone has to know how to put them in and keep them going. The need for refrigeration and air-conditioning exists worldwide.
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