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Codes & Technical Guidelines

Applicants are reminded that it is an offence under the Prevention of Bribery Ordinance (Chapter 201 of the Laws of Hong Kong) to offer any advantages (e.g. money, gift, etc.) to an employee of the EMSD as an inducement to or reward for facilitating or expediting the processing of applications, and in connection with the compliance with the application/ registration approval terms and conditions as appreciate.

The REAs have the obligation to remind developers / building owners/ responsible person of such probity requirement.

EMSD has established a Technical Taskforce with the relevant trade parties, professional institutions, academics and government departments to formulate the Building Energy Code (BEC) and Energy Audit Code (EAC) for the Buildings Energy Efficiency Ordinance. To provide certain explanations to the Codes against the legislative background, corresponding Technical Guidelines on Energy Audit Code and on Building Energy Code have been issued.

The BEC and EAC are reviewed once every three years. The new BEC 2021 Edition and the EAC 2021 Edition have been developed in tandem with the global development of relevant technology and energy efficiency standards. The building services installations should comply with the BEC 2021 Edition and the energy audit should be carried out in accordance with the EAC 2021 Edition with the effective dates stipulated in BEEO Technical Circular No. 1/2021.

Codes of Practice

The major changes between the BEC 2021 and BEC 2018
Download The major changes between the BEC 2021 and BEC 2018

The major changes between the EAC 2021 and EAC 2018
Download The major changes between the EAC 2021 and EAC 2018

BEC 2021 Edition
Download BEC 2021 Edition

EAC 2021 Edition
Download EAC 2021 Edition


The major changes between the BEC 2018 and BEC 2015
Download The major changes between the BEC 2018 and BEC 2015

The major changes between the EAC 2018 and EAC 2015
Download The major changes between the EAC 2018 and EAC 2015

BEC 2018 Edition
Download BEC 2018 Edition

EAC 2018 Edition
Download EAC 2018 Edition


The major changes between the BEC 2015 and BEC 2012/BEC (Rev. 1)
Download The major changes between the BEC 2015 and BEC 2012/BEC (Rev. 1)

BEC 2015 Edition
Download BEC 2015 Edition

EAC 2015 Edition
Download EAC 2015 Edition


Building Energy Code (BEC) 2012 Edition (Rev. 1)
Download Building Energy Code (BEC) 2012 Edition (Rev. 1)

Energy Audit Code (EAC) 2012 Edition (Rev. 1)
Download Energy Audit Code (EAC) 2012 Edition (Rev. 1)

BEC 2012 Edition – Addendum No. BEC01
Download BEC 2012 Edition – Addendum No. BEC01

EAC 2012 Edition – Addendum No. EAC01
Download EAC 2012 Edition – Addendum No. EAC01

EAC 2012 Edition – Addendum No. EAC02
Download EAC 2012 Edition – Addendum No. EAC02

BEC 2012 Edition
Download BEC 2012 Edition

EAC 2012 Edition
Download EAC 2012 Edition

Technical Guidelines

Technical Guidelines on Building Energy Code 2021 Edition (TG-BEC 2021)
Download Technical Guidelines on Building Energy Code 2021 Edition (TG-BEC 2021)

Technical Guidelines on Energy Audit Code 2021 Edition (TG-EAC 2021)
Download Technical Guidelines on Energy Audit Code 2021 Edition (TG-EAC 2021)


Technical Guidelines on Building Energy Code 2018 Edition (TG-BEC 2018)
Download Technical Guidelines on Building Energy Code 2018 Edition (TG-BEC 2018)

Technical Guidelines on Energy Audit Code 2018 Edition (TG-EAC 2018)
Download Technical Guidelines on Energy Audit Code 2018 Edition (TG-EAC 2018)


TG-BEC 2015 Edition – Addendum No. TG-BEC01
Download TG-BEC 2015 Edition – Addendum No. TG-BEC01

TG-BEC 2012 Edition (Rev.1) – Addendum No. TG-BEC02
Download TG-BEC 2012 Edition (Rev.1) – Addendum No. TG-BEC02

Technical Guidelines on Energy Audit Code 2015 Edition (TG-EAC 2015)
Download Technical Guidelines on Energy Audit Code 2015 Edition (TG-EAC 2015)

Technical Guidelines on Building Energy Code 2015 Edition (TG-BEC 2015)
Download Technical Guidelines on Building Energy Code 2015 Edition (TG-BEC 2015)


Technical Guidelines on Energy Audit Code (TG-EAC) 2012 Edition (Rev. 1)
Download Technical Guidelines on Energy Audit Code (TG-EAC) 2012 Edition (Rev. 1)

Technical Guidelines on Building Energy Code (TG-BEC) 2012 Edition (Rev. 1)
Download Technical Guidelines on Energy Audit Code (TG-EAC) 2012 Edition (Rev. 1)

TG-EAC 2012 Edition – Addendum No. TG-EAC01
Download TG-EAC 2012 Edition – Addendum No. TG-EAC01

TG-EAC 2012 Edition – Addendum No. TG-EAC02
Download TG-EAC 2012 Edition – Addendum No. TG-EAC02

TG-BEC 2012 Edition – Addendum No. TG-BEC01
Download TG-BEC 2012 Edition – Addendum No. TG-BEC01

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