Principal Group Sub-Group(Note 1) Annual Energy Consumption per Internal Floor Area(Note 2)
C1. Private Office C11. Grade A Office 480
C12. Grade B Office 577
C13. Grade C Office 635
C14. Office in Industrial-Office Building 582
C15. Office in Flatted Factory Building 587
C2. Restaurant C21. Chinese Restaurant 8,689
C22. Non-Chinese Restaurant 9,130
C23. Fast Food Shops 7,967
C24. Bars 3,354
C25. Other Eating and Drinking Places 8,718
C3. Retail C31. Food and Drinks Which Involve Cooking, Refrigeration and/or Plumbing Services 4,887
C32. Fuel 1,137
C33. Information, Communication, Electrical and Electronic Equipment 1,673
C34. Other Products 1,207
C4. Accommodations C41. Hotels 1,744
C42. Guest Houses 877
C43. Home for the Aged 1,088
C44. Residential Care 771
C5. Hospitals and Clinics C51. Hospitals 2,110
C52. Government Clinics 1,063
C53. Private Clinics, Medical Practitioner’s Offices 818
C54. Private Dental Clinics 965
C55. Chinese Medicine Practitioners 863
C56. Medical and X-Ray Laboratories 1,116
C6. Educational Services C61. Universities/ Colleges 961
C62. Adult Education/ Tutorial/ Vocational Schools 540
C63. Secondary Schools 411
C64. Primary Schools 322
C65. Kindergarten 553
C66. Special Education School 325
C7. Warehouse C71. Refrigerated Warehouse 2,042
C72. Non-Refrigerated Warehouse 214
C8. Personal Services C81. Tele-communications Network Operation and Other Tele-communications Activities 1,086
C82. Real Estate Brokerage and Agency 1,885
C83. Veterinary, Pets and Animal Services 1,091
C84. Laundry and Dry-cleaning Services 6,089
C85. Repairing of Electrical/Electronic Goods, Household Items 1,180
C86. Repairing of Motor Vehicles and Motorcycles 435
C87. Beauty and Body Prettifying Services 1,139
C88. Travel Agency 844
C89. Fitness Centre and Sports Activities 643
C810. Domestic Banking 1,399
C811. Photographic Activities (Studios) 1,444
C812. Motion Picture Projection Activities 1,301
C813. Creative and Performing Art Activities (Studios) 486
C814. Pawnshops, Money Changers and Foreign Exchange Brokers 1,956
C815. Courier Services 541
C816. Renting of Books, Dressing and Other Personal and Household Items 447
C817. Internet, Game and Other Entertainment Centres 2,061
C818. Design Services 720
C9. Premises – Common Area C91. Common Areas of Grade A Office Premises 2,724
C92. Common Areas of Grade B Office Premises 2,912
C93. Common Areas of Grade C Office Premises 1,194
C94. Common Areas of Industrial-Office Premises 956
C95. Common Areas of Flatted Factory Premises 412
C96. Common Areas of Commercial Complex/ Shopping Arcades 2,983
C97-98. Common Areas of Residential Premises 544
C10. Government Office Building / 657



  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.