HVAC technicians are responsible for comfortable, clean air. It’s an unwritten expectation in their job descriptions. How technicians achieve this mandate is left up to their interpretation of each heating and cooling situation. There is one component, however, that every installation must have — electricity. This silent force behind a majority of standard living in North America, electricity is a powerful tool when harnessed correctly but a lethal danger when handled improperly. To wield this power correctly, HVAC technicians have a responsibility to gain training and experience.