The HVAC Master exam in Maryland primarily covers which three code families?

• A. International Plumbing Code (IPC), International Residential Code (IRC), and International Fuel Gas Code (IFGC)
• B. International Mechanical Code (IMC), International Fuel Gas Code (IFGC), and National Electrical Code (NEC)
• C. International Energy Conservation Code (IECC), International Fire Code (IFC), and National Electrical Code (NEC)
• D. International Mechanical Code (IMC) alone

Answer: (B)

The gist of this question is recognizing which code families cover the main areas you deal with in HVAC: mechanical systems, fuel gas installations, and electrical safety. The best answer names the International Mechanical Code, the International Fuel Gas Code, and the National Electrical Code. Together, these codes guide how to design and install HVAC equipment and ductwork, how to properly pipe and vent gas appliances, and how to safely wire and protect the electrical systems that power and control HVAC. Other options mix in plumbing codes or energy/fire codes that aren’t the primary focus for typical Maryland HVAC master work, or they omit one of the essential areas.