What are low-cost commissioning measures that can be implemented without major hardware changes?

• A. Re-tuning schedules, occupancy-based operation, setpoint optimization, and turning off unneeded equipment.
• B. Replacing chillers.
• C. Installing new sensors.
• D. Upgrading controls.

Answer: (A)

Low-cost commissioning measures focus on how the existing equipment is operated and controlled rather than on adding or replacing hardware. By adjusting control logic and schedules within the current system, you can achieve meaningful energy savings with little to no investment.

Re-tuning schedules involves aligning when and how equipment runs with actual occupancy and weather patterns, so you’re not cooling or heating spaces that aren’t in use. Occupancy-based operation uses inputs from sensors or known occupancy patterns to modulate cooling, heating, and ventilation, ensuring spaces are conditioned only when needed. Setpoint optimization means nudging temperature targets to find the right balance between comfort and energy use, such as fine-tuning comfort ranges or how aggressively the system responds to conditions. Turning off unneeded equipment means identifying fans, pumps, or coils that can be safely shut down during unoccupied periods or low-load conditions.

These actions leverage the existing building automation system and require no major hardware changes, making them quick-win improvements. In contrast, options like replacing chillers, installing new sensors, or upgrading controls involve hardware replacements or additions and higher costs.