What is the minimum thickness of 16-inch duct made of aluminum in a residential system?

In residential systems, the minimum thickness for ductwork is determined by the mechanical code, which specifies requirements based on duct diameter and material. For a 16-inch aluminum duct, the minimum thickness to ensure proper structural integrity, prevent sagging, and maintain effective airflow is set to 24 gauge.

Using aluminum as a duct material takes advantage of its lightweight properties, which can allow for thinner gauges compared to heavier materials. However, even though aluminum is lighter, it still requires a specific thickness to withstand the pressures and wear associated with HVAC systems. A 24-gauge thickness meets these needs while ensuring compliance with construction practices and efficiency requirements.

Therefore, 24 gauge is the appropriate choice, satisfying the code and maintaining the required performance standards in a residential setting.