Air conditioning engineers are mechanical engineers who specialize in designing and creating HVAC systems to heat and cool interior areas, manage humidity and maintain good air quality. Air conditioning engineers develop climate control tools and systems for various environments and purposes. Air conditioning engineers have to consider the type of structure they’re designing for, what kind of temperature control they need and the amount of power output necessary for each project. They use their understanding of thermodynamics and electricity to create mechanical designs and develop prototypes.