# 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 1.1: Energy Efficiency Index (EEIW) of household washing machines and the washing cycle of household washer-dryers

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

For the calculation of the EEIW, the weighted energy consumption of the eco 40-60 programme at the rated washing capacity, half of the rated washing capacity and a quarter of the rated washing capacity is compared to its standard cycle energy consumption.
(a)The EEIW is calculated as follows, and is rounded to one decimal place:
EEIW = (EW/SCEW) × 100
where:
EW is the weighted energy consumption of the household washing machine or of the washing cycle of the household washer-dryer;
SCEW is the standard cycle energy consumption of the household washing machine or the washing cycle of the household washer-dryer.
(b)The SCEW is calculated in kWh per cycle as follows, and is rounded to three decimal places:
SCEW = -0,0025 × c2 + 0,0846 × c + 0,392
where c is the rated capacity of the household washing machine or the rated washing capacity of the household washer-dryer for the eco 40-60 programme.
(c)The EW is calculated in kWh per cycle as follows, and is rounded to three decimal places:
where:
EW,full is the energy consumption of the household washing machine or of the washing cycle of the household washer-dryer for the eco 40-60 programme at the rated washing capacity and rounded to three decimal places;
EW,½ is the energy consumption of the household washing machine or of the washing cycle of the household washer-dryer for the eco 40-60 programme at half of the rated washing capacity and rounded to three decimal places;
EW,1/4 is the energy consumption of the household washing machine or of the washing cycle of the household washer-dryer for the eco 40-60 programme at a quarter of the rated washing capacity and rounded to three decimal places;
A is the weighting factor for the rated washing capacity and rounded to three decimal places;
B is the weighting factor for half of the rated washing capacity and rounded to three decimal places;
C is the weighting factor for a quarter of the rated washing capacity and rounded to three decimal places;
for household washing machines with a rated capacity lower than or equal to 3 kg and for household washer-dryers with a rated washing capacity lower than or equal to 3 kg, A shall be equal to 1; B and C shall be equal to 0;
for other household washing machines and household washer-dryers, the values of the weighting factors depend on the rated capacity according to the following equations:
A = -0,0391 × c + 0,6918
B = -0,0109 × c + 0,3582
C = 1 - (A + B)
where c is the rated capacity of the household washing machine or the rated washing capacity of the household washer dryer.

---
Source: https://www.legislation.gov.uk/eur/2019/2023/annex/III/division/1/division/1.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2019-2023/annex-III/division-1/division-1.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.