HVAC professionals need to be well versed in mechanical systems and the science behind them. Which one of the following subjects should they have the most in-depth understanding of and why? plumbing, because cooling systems rely on pipes to carry coolant throughout the building
cement masonry, because many HVAC systems must be wired through the foundation
electrical wiring, because many HVAC systems are electrical in nature
geotechnical engineering, because HVAC technicians need to know how soil and rock will affect the building environment