# Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks (Text with EEA relevance), Division (a): The smart control factor is calculated as follows:

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

SCF = 1 − Q fuel,week,smart + CC × Q elec,week,smart Q fuel,week + CC × Q elec,week

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Source: https://www.legislation.gov.uk/eur/2013/814/annex/IV/division/4/division/a (the official version)
Page: https://openlegislation.uk/eu-regulation-2013-814/annex-IV/division-4/division-a
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.