What is the minimum thickness needed for a 14-inch round sheet metal duct used in a residence?

The minimum thickness needed for a 14-inch round sheet metal duct used in a residence is 0.013 inches. This specification ensures the duct can handle the necessary airflow while maintaining structural integrity. Sheet metal ducts must be sufficiently thick to resist deformation and leakage at the seams and joints, especially when under pressure from the HVAC system.

This thickness aligns with the building codes and regulations that dictate standards for residential ductwork. A thickness of 0.013 inches represents a middle ground that balances durability and weight, making it suitable for most residential applications. Ensuring compliance with these standards is essential for the efficiency and safety of the heating and cooling systems.