What is ongoing commissioning and its benefits?

• A. Continuous verification of building system performance to ensure ongoing energy savings.
• B. A one-time commissioning during construction.
• C. It is only for HVAC systems improvement during design.
• D. It measures occupant satisfaction only.

Answer: (A)

Ongoing commissioning is continuous verification and tuning of building systems so they keep operating as intended and continue delivering energy savings over the life of the building. It relies on real-time or regular monitoring of system performance to catch drift, faults, or suboptimal controls and then makes adjustments or triggers corrective actions. This ongoing process ensures that the building continues to meet its design goals for efficiency and comfort, rather than letting performance degrade over time.

That’s why the best choice describes continuous verification of system performance to maintain ongoing energy savings. The other ideas are narrower or inaccurate: a one-time commissioning happens during construction, ongoing commissioning isn’t limited to HVAC or confined to the design phase, and occupant satisfaction is not the sole or primary measure of ongoing commissioning.