What is the minimum thickness required for a 14" round sheet metal duct used in a residence?

The minimum thickness required for a 14" round sheet metal duct used in residential applications is 0.013 inches. This thickness is specified because it provides the necessary structural integrity for the duct while also accommodating the pressure and airflow requirements typical in residential heating, ventilation, and air conditioning systems.

Using a thinner material could compromise the duct’s durability, leading to issues such as dents or deformation, which could ultimately affect airflow efficiency and performance. In contrast, using a thicker material than required could unnecessarily increase costs and weight without adding significant benefits in standard residential applications. Understanding the standards set forth in the relevant building codes and regulations is essential for ensuring that installations are safe, efficient, and compliant.