Other Common Titles: HVAC Service Technician, Commercial Service Technician, Heating and Air Conditioning Technician, Heating and Cooling Technician, Service Technician, Refrigeration Technician, HVAC Mechanic, HVAC Apprentice, Heating, ventilation, air conditioning, and refrigeration, HVAC Specialist, HVAC Refrigeration, HVAC/R, and HVAC-R. Additional certification in one or more of the following: electrical, mechanical, HVAC and refrigeration systems, process controls, mechanical power transmissions, painting, plumbing, carpentry or engine repair.