# Commission Decision of 19 November 2008 establishing detailed guidelines for the implementation and application of Annex II to Directive 2004/8/EC of the European Parliament and of the Council (notified under document number C(2008) 7294) (Text with EEA relevance) (2008/952/EC), Division 5.2: The overall efficiency of a cogeneration unit is determined in the following way: the energy output of the CHP plant (electricity, mechanical energy and useful heat) over a defined reporting period shall be divided by the fuel input to the cogeneration unit over the same reporting period, i.e.

Extent: E+W+S+N.I.

Overall efficiency = (energy output)/(fuel input)

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Source: https://www.legislation.gov.uk/eudn/2008/952/annex/division/I/division/5/division/5.2 (the official version)
Page: https://openlegislation.uk/eu-decision-2008-952/annex/division-I/division-5/division-5.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.