What aspect of a central vacuum system is critical for an inspector to evaluate?

Evaluating all outlets for functionality is critical as it directly impacts the efficiency and usability of the central vacuum system. Each outlet is designed to provide suction to various areas within the home, and if any outlet fails to operate correctly, it can lead to inadequate cleaning performance. Inspectors should assess each outlet to ensure that they are functioning properly, as this is essential for the overall effectiveness of the system.

While suction power is important, it is often determined by the main unit and may not be representative of the outlet's performance itself. The appearance of the main unit and the accessibility of the maintenance manual may provide helpful information, but they don't directly affect how well the system operates in different areas of the home. Evaluating the functionality of all outlets ensures that the entire system is operational, which is the primary concern for homeowners relying on a central vacuum for effective cleaning.