If you must cut a section of duct, what should be firmly in place?

When cutting a section of duct, it is essential to ensure that the cover is firmly in place. This is because the cover provides integrity to the duct system, helping to maintain the intended airflow while minimizing the risk of debris entering the ducts during maintenance work. Securing the cover helps to prevent any potential contaminants from compromising the system's performance and safety.

Additionally, having the cover in place can assist in minimizing noise and ensuring that the duct remains sealed properly, which is critical for both efficiency and safety. When the cover is secure, it also indicates that the surrounding areas of the ductwork are not at risk of being exposed to environmental factors that could lead to damage or reduced performance.

While support brackets, insulation, and access doors are important components of ductwork, they do not provide the same level of immediate protection during the cutting process as a properly secured cover. Thus, ensuring the cover is in place is a key step in maintaining both the functionality and safety of the duct system during maintenance activities.