The subject building was a 386000ft² high-rise building that was occupied in 1990. It was not initially commissioned, but subsequent monitoring revealed some ways in which the building's operation could be improved. The operators made adjustments to improve energy efficiency, in essence 'recommissioning' portions of the heating, ventilation and air-conditioning (HVAC) system. The monitoring also lead to the conclusion that data from commissioning should be used to improve building designs and energy conservation programmes. Focuses on the monitoring of the building, the aspects of monitoring that helped identify potential energy-efficient changes that could be made through commissioning, and the energy savings potential associated with those changes.

KEYWORDS: commissioning, air conditioning, ventilation, multistorey buildings, monitoring, energy conservation.