# Commission Delegated Regulation (EU) No 65/2014 of 1 October 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of domestic ovens and range hoods (Text with EEA relevance), Division 2.4: Calculation of the Grease Filtering Efficiency (GFEhood)

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

The Grease Filtering Efficiency (GFEhood) of a domestic range hood means the relative amount of grease retained within the range hood grease filters. It shall be calculated and rounded to the first decimal place as:
GFEhood=wg∕wr+ wt+ wg× 100 %Where:
— wg the mass of oil in the grease filter, including all detachable coverings, in g and rounded to the first decimal place,
— wr the mass of oil retained in the airways of the range hood, in g and rounded to the first decimal place,
— wt the mass of oil retained in the absolute filter, in g and rounded to the first decimal place.

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Source: https://www.legislation.gov.uk/eur/2014/65/annex/II/division/2/division/2.4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2014-65/annex-II/division-2/division-2.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.