When can duct installation cover a service opening?

The correct choice indicates that duct installation can cover a service opening when it is identified. This is important because service openings must remain accessible for maintenance and inspection of the duct systems. By identifying the service openings, technicians and users will be aware of where maintenance access is located, ensuring that these crucial points can be easily found and accessed when necessary.

While factors like cleaning, painting, or proper installation may contribute to the overall effectiveness and functionality of the duct system, they do not address the critical aspect of maintenance accessibility. Identifying service openings allows for the responsible and compliant installation of HVAC systems, aligned with industry standards and best practices.