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Energy Saving Tips

(1) Maintain average indoor air temperature between 24-26°C

• For air temperature measurement, please refer to General Guidelines on Air Temperature Measurement.
• Keep all the windows and doors close when air-conditioner is running.
• Keep doors between air-conditioned and non-air-conditioned areas such as those connecting the outside of the building, lift lobbies, toilets and stores shut so as to minimize air infiltration when the air-conditioner is operating. Please keep door of fridge closed.
• Dress light to minimize the use of AC.
• Consider using an electric fan in conjunction with AC to spread cooled air more effectively.
• Set an indoor AC unit to low fan speed as the normal setting. Use a high fan speed first rather than lowering the temperature setting to cater for an increased cooling demand.
• Carry out regular maintenance on office equipment for optimal energy efficiency performance.

(2) Switch off appliances and systems when not in use

• Lights, air-conditioners should be switched off in areas that are unoccupied. With few people working in the office, switch off the non-essential lighting and use task lighting to directly illuminate work areas.
• Part of lift and escalator can be idled during non-peak hour.
• Use appliances with timer control or automatically switch-off control functions to avoid leaving appliances in standby mode for a long period. Unplug all equipment chargers and adapters when they are not in use. Please read leaflet on Reducing Standby Power Consumption.
• Switch off the computer screen can save more energy instead of letting the "screen saver" run.
• When leaving office, arrange for the last-man-out to check and switch off the power source to all air-coniditioner, lighting and office equipment that are not in use.

(3) Procure energy efficient appliances and systems

• Upon replacement of old appliances/ systems, please purchase
  • appliances with Grade 1 energy labels covered by the Mandatory Energy Efficiency Labelling Scheme (MEELS) as far as practicable. The scheme currently covers eleven types of prescribed products, namely room air conditioners, refrigerating appliances, compact fluorescent lamps (CFLs), washing machines, dehumidifiers, televisions, storage type electric water heaters, induction cookers, gas cookers, gas instantaneous water heaters and LED lamps. An appliance with Grade 1 energy label is the most energy efficient. Please click here for more about MEELS; or
  • appliances with Grade 1 energy labels or "Recognition Type" energy label covered by Voluntary Energy Efficiency Labelling Scheme (VEELS) as far as practicable. The scheme has two labelling systems, namely the “Grading Type” and the "Recognition Type" energy labels. It currently covers twenty two types of household appliances, office equipment and gas appliance. They are:-

    Grading Type
    Household Appliances	Refrigerating Appliances (Voluntary Scheme), Room Air Conditioners (Voluntary Scheme), Household Electric Storage Water Heaters, Television and Electric Clothes Dryers

    Recognition Type
    Household Appliances	Non-integrated Type Compact Fluorescent Lamps, Electric Rice-Cookers, Dehumidifiers (Voluntary Scheme), Microwave Ovens and Electronic Ballasts
    Office Equipment	Computers, Hot/ Cold Bottled Water Dispensers, LCD Monitors, Photocopiers, Fax Machines, Multifunction Devices and Printers

    Please click here for more about VEELS.
  • systems with energy efficient standards stated in the latest version of the Code of Practice of Energy Efficiency of Building Services Installation. Please click here for more about Code of Practice of Energy Efficiency of Building Services Installation.
  • Besides, when purchasing appliances, you are encouraged to make good use of "Energy Saver" in the EMSD's mobile application "E&M Connect" to check and compare the energy efficiency and the estimated annual electricity charges of different models of appliances. Please click here for more about “E&M Connect”.
    
• Upon replacement of old fridge, please procure fridge with door.
• Other energy efficient technologies are recommended and they are listed below:
  • Timer controls
  • Occupancy/ motion sensors
  • Intelligent power bars
  • High Efficiency Chillers
  • Physical Scale Prevention Technologies for Chiller Condenser
  • Total Hydronic Balancing in Chilled Water System
  • Solar Thermal Collectors for Water Heating
  • Solar Control Window Film Information Leaflet
  • VAV System Static Pressure Reset Control
  • High Efficiency Motor
  • Lift Regenerative Power
  • Service On Demand Escalator
  • Light Emitting Capacitor (LEC) Exit Sign
  • LED General Lighting
  • Variable Speed Room Air Conditioner
  • Variable Speed Drives (VSD) for air-conditioning equipment
  • Heat Pump Water Heaters
  Publications on above technologies are available here.

(4) Engage staff / students to adopt the above energy saving practices together

• Involve staff / students in planning and implementation of energy saving practices.
• Set goals and provide feedback to staff / students on progress / results of energy saving practices
• Provide briefing / seminar / workshops to staff / students to introduce the Charter and the benefits of energy saving
• Communicate regularly with staff / students on energy saving practices.
• Create opportunities for sharing of goals and accomplishments.

(5) Energy saving tips for office

• Also, there are energy saving tips for office:
  • Energy Saving Tips for Office

(6) Carbon reduction measures

• In addition, there are carbon reduction measures by referring to relevant guides by Environmental Protection Department:
  • Guide To Low Carbon Offices
  • Guide To Low Carbon Schools