# Commission Regulation (EU) No 66/2014 of 14 January 2014 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for domestic ovens, hobs and range hoods (Text with EEA relevance), Division 3.3.1: Domestic range hoods with a maximum air flow in any of the available setting higher than 650 m3/h shall automatically revert to an air flow lower than or equal to 650 m3/h in a time tlimit. This is the time limit to extract a volume of air of 100 m3 by the domestic range hood operating with an airflow higher than 650 m3/h, before automatically switching to an airflow of 650 m3/h or lower. It is calculated, expressed in minutes and rounded to the nearest integer as:

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

tlimit=6000 m3Qmax
Where:
Qmax is the maximum air flow of the domestic range hood, including intensive/boost mode if present, in m3/h and rounded to the first decimal place.
The mere presence of a manual switch or setting decreasing the air flow of the appliance to a value lower than or equal to 650 m3/h is not considered fulfilling this requirement.

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Source: https://www.legislation.gov.uk/eur/2014/66/annex/II/division/3/division/3.3/division/3.3.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2014-66/annex-II/division-3/division-3.3/division-3.3.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.