# Commission Delegated Regulation (EU) 2015/1186 of 24 April 2015 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of local space heaters (Text with EEA relevance), Division 3: General conditions for energy efficiency index and consumption of local space heaters:

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

(a) The useful efficiency values ηth,nom , ηth,min and the direct and indirect heat output values for Pnom , Pmin are measured, where applicable.
(b) The energy efficiency index (EEI) shall be calculated as the seasonal space heating energy efficiency in active mode (ηS,on ) corrected for local space heaters using biomass as preferred fuel by a factor taking into account the renewable character of the preferred fuel, and corrected by contributions accounting for temperature controls, auxiliary electricity consumption and permanent pilot flame energy consumption. The energy efficiency index (EEI) is expressed as a figure equivalent to its figure expressed in percentage.

---
Source: https://www.legislation.gov.uk/eur/2015/1186/annex/VIII/division/3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2015-1186/annex-VIII/division-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.