Energy Saving Charter & 4Ts Charter

In Hong Kong, buildings account for about 90% of our electricity consumption, representing over 60% of greenhouse gas emissions. Launched by the Environment Bureau and the Electrical and Mechanical Services Department, the “Energy Saving Charter” encourages the participating organizations to maintain an average indoor temperature between 24-26°C during the months of June to September. Also, the Government has established a partnership with major stakeholders in the built environment under the 4Ts framework, namely target, timeline, transparency and together, under which the 4Ts partners are encouraged to set their energy saving targets and timelines and to share their existing and planned energy saving measures.


PolyU has signed the Energy Saving Charter and 4Ts Charter in 2019

PolyU has supported this Energy Saving Charter since 2013. Energy conservation has long been a commitment and being a key indicator in the context of PolyU campus sustainability. Thus, keeping the indoor air-conditioning temperature within an efficient range could assist in reducing greenhouse gas emissions and promote energy conservation on campus. 

This year, PolyU has pledged to support the Energy Saving Charter and also 4Ts Charter with the scope:-

Energy Saving Charter scheme (for offices)

  • To maintain average indoor air temperature at 24-26oC during the summer months of June to September in 2019;
  • To switch off appliances and systems when not in use from June 2019 to May 2020;
  • To procure energy efficient appliances (such as with Grade 1 energy labels) and systems from June 2019 to May 2020;
  • To engage staff / students / tenants to adopt the above energy saving practices together.

4Ts Charter scheme

  • To set energy saving target with a timeline;
  • To ensure transparency on energy saving result and building energy data;
  • To encourage inhabitants (including staff/students/occupants/tenants) to work together on the above energy saving target.


Energy Saving Charter 2019


You can find more information about the Charter from Environment Bureau's website at


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