Heating and air-conditioning systems control the temperature, humidity, and the total air quality in residential, commercial, industrial, and other buildings. Heating and air-conditioning mechanics and installers—also called technicians—install, maintain, and repair such systems. Employment is projected to grow faster than average for heating, ventilation, and air conditioning service technicians, according to the U.S. Department of Labor.* Job prospects are expected to be excellent, particularly for those with training from an accredited technical school or with formal apprenticeship training. You could get the vocational education and training you need at TESST College of Technology to enter this promising field.