HVAC technicians install and maintain heating, ventilation, and air-conditioning equipment including chillers, split units, ducts, compressors, and air-handling systems. Their work involves interpreting schematics, performing leak tests, charging refrigerants, and diagnosing airflow or electrical issues. As global energy efficiency standards tighten, technicians increasingly handle smart HVAC controls, variable-speed drives, and eco-friendly refrigerants. They work across construction, facilities management, industrial plants, and service centers. Strong safety compliance, precision, and environmental awareness are essential due to refrigerant handling regulations. Global demand remains strong due to urbanization, rising cooling needs, and retrofitting of energy-efficient systems.