House-keeping

Good house-keeping is of utmost importance so as to ensure the best energy performance of the equipment/system. Simple measures can be undertaken by the occupants to minimize the energy consumption. A number of house-keeping measures can be found in the following sources. These measures usually involve no cost investment and without any disruption to building operation.

In addition to the measures described in the above webpages, further energy saving opportunities for enhancing energy saving are listed below. These measures require no addition cost and can be practiced by anyone in any organization:

Air conditioning (AC) and Ventilation

1. AC temperature set-point should not be below 25.5°C in Summer months if most occupants consider it acceptable.
 
2. Set room coolers or packaged air conditioners at "low cool". Where possible, use fans to improve airflow to achieve thermal comfort.
 
3. Dress lightly in hot days to minimize use of AC.
   
4. Avoid pre-cooling. Switch on centralized AC system not more than 30 minutes in advance in the morning. For units serving smaller areas, such as room coolers, switch them on only when you upon arrival.

 

 

5. Set fan coil unit at "low" fan speed as usual setting. Use higher fan speed rather than decreasing the temperature setting to cater for increased cooling demand when necessary.
   
6. Turn off some AC units when the occupancy is low (e.g. on Saturdays or after normal office-hours).

Lighting

1. Turn off lighting if it is not needed.
 
2. Turn off some lighting when the occupancy is low (e.g. on Saturdays).
 
3. Cut down number of lamps/luminaires in perimeter area sufficiently lit by natural daylight.

Computers

1. Set PCs to hibernation mode or standby mode where applicable.
 
2. Turn off the monitor during lunch and after office hours, or when you are away form the workplace and after office hours.
 
3. Turn off the monitor the time you leave your office even for a short meeting. Using "screen saver" does no save much energy (less than 10%).
   
4. Turn off the master switch of printers connected PCs when not in use.

Servers

1. For good heat dissipation, maintain adequate air flow around computer equipment rather than reducing the room temperature. Monitor indoor temperature of server rooms (e.g. by installing thermometers) to avoid excessive cooling.
 
2. During period of low power demand from servers, consider switching off some AC units in server rooms.
 
   
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