Optimise controls to ensure user comfort and minimise electricity costs.

These are a few checkpoints:

• Set internal temperature to the maximum acceptable point.
• Evaluate night setback control against dynamic control.
• Relate chilled water temperature to building load.
• Reduce warm fresh air intake to an acceptable limit and recycle colder inside air. Consult international standards on the amount of fresh air that has to be supplied to a conditioned building.
• Use the cold outside air during the night to cool the building (free cooling). This is usually done in places with low humidity.
• Switch off non-essential electrical loads or enable power save mode, if available, during the night. This reduces non-essential electrical load energy, electricity consumption and reduces temperature build up in the building. Electricity is also wasted by the HVAC system in overcoming this temperature build up.