September 2021
- What does zero mean?
Article for CIBSE Journal
Having a set of commonly agreed, clear and comprehensive definitions for ‘net zero’ buildings is necessary for investment, specifications, trusted and consistent reporting, certification and, ultimately, regulations.
There has been great progress on this in the past few years – first with the UK Green Building Council (UKGBC) framework, and then the London Energy Transformation Initiative (LETI) one-pager on operational carbon (energy use), which is supported by CIBSE. As a next step, LETI and the Whole Life Carbon Network (WLCN) recently produced a full set of definitions, including operational, embodied and whole-life carbon.
The LETI-WLCN definitions provide principles, but it is difficult to cover, in a succinct and clear way, the range of situations that a building and its energy supplies may face in practice. CIBSE will now be working with LETI to produce a set of FAQs on these definitions, to support clients and project teams, and bring consistency in how definitions are applied. Clarifications will be provided, along with illustrations of a range of situations.
In addition, CIBSE could decide to adopt the LETI-WLCN definitions.
Engagement with industry is essential on such an important topic, to create the best possible set of definitions for us all to work from.
Please send your thoughts on the definitions, what you think the FAQs should cover, and what position you think CIBSE should adopt, at JGodefroy@cibse.org
Also, look out for events and a survey in the next few weeks, when we will be collating views.
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