Which code governs the construction of galvanized steel ducts used for combustion?

The International Mechanical Code is the governing code for the construction of galvanized steel ducts used for combustion. This code provides guidelines and standards specifically related to the design, installation, maintenance, and inspection of mechanical systems, which include heating, ventilation, and air conditioning (HVAC) systems, as well as associated ductwork.

In the context of combustion air requirements and flue gas venting, the International Mechanical Code outlines the necessary specifications to ensure safe and effective airflow in relation to combustion appliances. This includes regulations concerning the materials that can be used, such as galvanized steel for ducts, and the proper methods to ensure they are fitted and sealed correctly to prevent any gas leaks or safety hazards.

While other codes, such as the International Building Code or the National Electrical Code, cover different aspects of building construction and electrical installations respectively, they do not specifically address the technical requirements surrounding mechanical systems and their components as comprehensively as the International Mechanical Code does. The Uniform Plumbing Code governs plumbing systems and is not applicable in this context, further establishing the International Mechanical Code as the most relevant authority for this situation.