Which of the following is the minimum required clearances for duct systems?

The minimum required clearances for duct systems are essential to ensure proper airflow, maintain efficiency, and prevent hazards like fire. A clearance of 6 inches is typically mandated to allow for sufficient space around ductwork, particularly when it runs near combustible materials or other structures. This clearance helps to mitigate heat transfer, reduce the risk of obstructions that could impede airflow, and comply with safety standards outlined in the North Carolina Mechanical Code.

Maintaining this clearance is crucial for both the performance of HVAC systems and the safety of the building occupants. It allows for adequate access for maintenance and inspections, ensuring that any potential issues can be addressed efficiently. Adhering to the 6-inch clearance helps create a balanced system that can operate effectively while minimizing risks associated with duct systems.