Heating and air-conditioning systems (HVAC) regulate the temperature, humidity, and the total air quality in residential, commercial, industrial, and other buildings. As a technician, you must be able to maintain, diagnose, and correct problems throughout the entire system. Diversity of skills and tasks is also significant to this field. You must know how to follow blueprints or other specifications to install any system. You may also need working knowledge of sheet metal practices for the installation of ducts, welding, basic pipefitting, and electrical practices. NCCER's program has been…
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