VAC (Heating Ventilation, and Cooling) is a very lucrative career field. People always have a need for heating and air conditioning no matter the season or the location. Onething that many people do not realize is the level ofHvac trainingone must have to become a truly qualified technician. There are many different skill sets that must be mastered before one call himself truly trained in HVAC. Below is a discussion of some of the aspects ofHVAC training.