What metric would you monitor to verify energy performance improvement after optimizing BAS?

• A. Energy usage (kWh) and power factor.
• B. Building occupancy count.
• C. Average thermostat setpoint.
• D. Number of alarms.

Answer: (A)

The main idea is to use direct energy performance measures that reflect how efficiently the building is operated after the BAS optimization. Tracking energy usage in kilowatt-hours shows how much energy the building is actually consuming, so you can compare pre- and post-optimization under similar conditions. In addition, monitoring power factor reveals how effectively electrical power is being used; a better (higher) power factor means less wasted energy and fewer inefficiencies in the electrical system.

Together, these metrics give a clear picture of improvement: you should see lower energy consumption for the same conditions and a healthier power factor as the BAS runs equipment more efficiently.

Other indicators aren’t as direct for measuring energy performance. Occupancy count helps explain load changes but doesn’t quantify efficiency. Average thermostat setpoints are control settings, not a performance measurement. The number of alarms reflects reliability or issues, not how well energy is being used.