HVAC engineers are professionals who specialize in the design, installation, and maintenance of heating, ventilation, and air conditioning systems. They are also known as HVAC technicians, HVAC installers, HVAC designers, and HVAC contractors. HVAC engineers are responsible for ensuring that HVAC systems are installed and maintained according to industry standards and regulations. They must also be knowledgeable about the latest technologies and trends in the HVAC industry. HVAC engineers must have a strong understanding of the principles of thermodynamics, fluid mechanics, and heat transfer in order to design and install efficient and effective HVAC systems.