This is one of many building that we look after in West Perth, with regard to Service and Maintenance . Four storey building. It has two Carrier air cooled DX Chillers on the roof. These are used as lead and lag in summer and then generally the main Chiller does not start during winter. The system has a 10,000 litre insulated chilled water tank that is pre cooled so that it takes considerable load off the chillers on start up each morning. VAV units on all floors, full BMS control, VSD drives on all of the Fan Coil Units.