HVAC is an abbreviation for heating, ventilation, and air conditioning. A qualified HVAC technician is a technician who installs, maintains, and repairs heating, ventilation, air conditioning, and refrigeration systems that control the temperature and air quality in buildings. HVAC/R is an alternative abbreviation.
HVAC technicians install and maintain heating, ventilation and air conditioning systems. They are hired by maintenance companies where their services are hired out. Many HVAC technicians also work in large companies that have high maintenance needs.