ESOS Audit

The Energy Saving Opportunity Scheme Audit

An ESOS audit is a review of how energy is used in your organisation with an on-site survey of how things look on the ground. It includes all energy used, whether in buildings, transport or industrial processes.

The audit includes charting ‘energy trends’ (whether your energy use has gone up or down over time) and calculating your energy intensity ratio (e.g. energy use per employee). Using this information, together with the site survey findings, recommendations for energy savings opportunities are compiled. 

An ESOS Audit must:

  • Be based on 12 months verifiable data, which must in turn:
  • be for a continuous period
  • begin no earlier than 6 December 2010 for the first compliance period (and no more than 12 months before the start of future compliance periods)
  • begin no more than 24 months before the start of the energy audit
  • not have been used as the basis for an energy audit in a previous compliance period
  • Contain energy consumption and energy efficiency analysis
  • Recommend cost effective energy saving opportunities (including estimated costs and benefits)

There is no regulatory requirement for participants to implement the energy saving opportunities identified, although clearly there are likely to be net financial gains for businesses in undertaking work on the most significant areas identified

What happens during a site visit?

Site visits will need to be undertaken as part of an ESOS audit. Organisations with multiple sites or assets that are identical, or very similar, can take a proportionate approach and apply the energy saving opportunities identified to their wider portfolio to reflect the energy consumption patterns of their assets and activities.