Principal Group Sub-Group(Note 1) Annual Energy Consumption per Saleable Floor Area(Note 2)
C1. Private Office C11. Grade A Office 463
C12. Grade B Office 529
C13. Grade C Office 592
C14. Office in Industrial-Office Building 550
C15. Office in Flatted Factory Building 559
C2. Restaurant C21. Chinese Restaurant 8,134
C22. Non-Chinese Restaurant 8,383
C23. Fast Food Shops 7,586
C24. Bars 3,114
C25. Other Eating and Drinking Places 8,149
C3. Retail C31. Food and Drinks Which Involve Cooking, Refrigeration and/or Plumbing Services 4,321
C32. Fuel 1,011
C33. Information, Communication, Electrical and Electronic Equipment 1,467
C34. Other Products 1,061
C4. Accommodations C41. Hotels 1,732
C42. Guest Houses 872
C43. Home for the Aged 1,082
C44. Residential Care 768
C5. Hospitals and Clinics C51. Hospitals 2,095
C52. Government Clinics 1,052
C53. Private Clinics, Medical Practitioner’s Offices 812
C54. Private Dental Clinics 956
C55. Chinese Medicine Practitioners 856
C56. Medical and X-Ray Laboratories 1,112
C6. Educational Services C61. Universities/ Colleges 950
C62. Adult Education/ Tutorial/ Vocational Schools 535
C63. Secondary Schools 406
C64. Primary Schools 319
C65. Kindergarten 548
C66. Special Education School 322
C7. Warehouse C71. Refrigerated Warehouse 2,039
C72. Non-Refrigerated Warehouse 213
C8. Personal Services C81. Tele-communications Network Operation and Other Tele-communications Activities 957
C82. Real Estate Brokerage and Agency 1,636
C83. Veterinary, Pets and Animal Services 996
C84. Laundry and Dry-cleaning Services 5,349
C85. Repairing of Electrical/Electronic Goods, Household Items 1,030
C86. Repairing of Motor Vehicles and Motorcycles 393
C87. Beauty and Body Prettifying Services 1,005
C88. Travel Agency 750
C89. Fitness Centre and Sports Activities 597
C810. Domestic Banking 1,313
C811. Photographic Activities (Studios) 1,267
C812. Motion Picture Projection Activities 1,282
C813. Creative and Performing Art Activities (Studios) 437
C814. Pawnshops, Money Changers and Foreign Exchange Brokers 1,706
C815. Courier Services 500
C816. Renting of Books, Dressing and Other Personal and Household Items 401
C817. Internet, Game and Other Entertainment Centres 1,895
C818. Design Services 646
C9. Premises – Common Area C91. Common Areas of Grade A Office Premises 2,668
C92. Common Areas of Grade B Office Premises 2,850
C93. Common Areas of Grade C Office Premises 1,178
C94. Common Areas of Industrial-Office Premises 945
C95. Common Areas of Flatted Factory Premises 410
C96. Common Areas of Commercial Complex/ Shopping Arcades 2,958
C97-98. Common Areas of Residential Premises 544



  1. Definition of each subgroup is shown in the glossary.
  2. Stakeholders are encouraged to consider these energy utilization indexes as one way, but not the only way, of improving their energy performance with respect to the past. Comparisons of indicators between business operations within the same sector should be made with caution. Businesses in the same subgroup may be operating under different economic, environmental and operational constraints, causing different energy performance. The business processes in different business subgroups are inherently varied resulting in different achievable energy performance levels. The energy utilization indexes are derived from studies on a limited size of samples within the population of respective energy-consuming groups. These indicators should not be construed as representative energy consumption levels of the population, nor as territory-wide standards which businesses in the respective energy-consuming groups should comply with.