# 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 3: CONDITIONS FOR TESTING THE SMART CONTROL COMPLIANCE (SMART) OF WATER HEATERS

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

Where the manufacturer deems it appropriate to declare the value of smart as being ‘1’, measurements of the weekly electricity and/or fuel consumption with or without smart controls shall be carried out using a two-week measurement cycle as follows:
days 1 to 5: random sequence of load profiles chosen from the declared load profile and the load profile one below the declared load profile, and smart control disabled,
days 6 and 7: no water draw-offs, and smart control disabled,
days 8 to 12: repetition of the same sequence applied for days 1 to 5, and smart control enabled,
days 13 and 14: no water draw-offs, and smart control enabled,
the difference between the useful energy content measured during days 1 to 7 and the useful energy content measured during days 8 to 14 shall not exceed 2 % of Qref of the declared load profile.

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Source: https://www.legislation.gov.uk/eur/2013/814/annex/III/division/3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2013-814/annex-III/division-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.