# Commission Regulation (EU) 2019/2023 of 1 October 2019 laying down ecodesign requirements for household washing machines and household washer-dryers pursuant to Directive 2009/125/EC of the European Parliament and of the Council, amending Commission Regulation (EC) No 1275/2008 and repealing Commission Regulation (EU) No 1015/2010 (Text with EEA relevance), Division (1): The weighted water consumption (WW) of a household washing machine or of the washing cycle of a household washer-dryer is calculated in litres as follows, and is rounded to the nearest integer:

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

Wt = (A × WW,full + B × WW,1/2 + C × WW,1/4)
where:
WW,full is the water consumption of the household washing machine or of the washing cycle of a household washer-dryer for the eco 40-60 programme at rated washing capacity, in litres and rounded to one decimal place;
WW,½ is the water consumption of the household washing machine or of the washing cycle of a household washer-dryer for the eco 40-60 programme at half of the rated washing capacity, in litres and rounded to one decimal place;
WW,1/4 is the water consumption of the household washing machine or of the washing cycle of a household washer-dryer for the eco 40-60 programme at a quarter of the rated washing capacity, in litres and rounded to one decimal place;
A, B and C are the weighting factors as described in point 1.1(c).

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Source: https://www.legislation.gov.uk/eur/2019/2023/annex/III/division/5/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2019-2023/annex-III/division-5/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.