The Ecodesign for Energy-Related Products and Energy Information Regulations 2021

Energy efficiency index

2.—(1) For the calculation of the EEI_W, the weighted energy consumption of the eco 40-60 programme at—

(a) the rated washing capacity;

(b) half of the rated washing capacity; and

(c) one quarter of the rated washing capacity;

must be compared to its standard cycle energy consumption.

(2) The EEI_W must be rounded to one decimal place and calculated as follows—

• EEI_W = (E_W/SCE_W) × 100.

(3) For the purposes of sub-paragraph (2)—

(a) E_W is the weighted energy consumption of the household washing machine or of the washing cycle of the household washer-dryer;

(b) SCE_W is the standard cycle energy consumption of the household washing machine or the washing cycle of the household washer-dryer.

(4) The SCE_W must be rounded to three decimal places and calculated in kWh per cycle as follows—

• SCE_W = -0.0025 × c² + 0.0846 × c + 0.3920.

(5) For the purposes of sub-paragraph (4), c is—

(a) the rated capacity of the washing machine; or

(b) the rated washing capacity of the washer-dryer;

for the eco 40-60 programme.

(6) The E_W must be rounded to three decimal places and calculated in kWh per cycle as follows—

(7) For the purposes of sub-paragraph (6)—

(a) E_W,full is the energy consumption of—

(i) the washing machine; or

(ii) the washing cycle of the household washer-dryer;

for the eco 40-60 programme at the rated washing capacity, rounded to three decimal places;

(b) E_W,½ is the energy consumption of—

(i) household washing machine; or

(ii) the washing cycle of the household washer-dryer;

for the eco 40-60 programme at half of the rated washing capacity, rounded to three decimal places;

(c) E_W,1/4 is the energy consumption of—

(i) the washing machine; or

(ii) the washing cycle of the household washer-dryer;

for the eco 40-60 programme at a quarter of the rated washing capacity, rounded to three decimal places;

(d) A is the weighting factor for the rated washing capacity and rounded to three decimal places;

(e) B is the weighting factor for half of the rated washing capacity and rounded to three decimal places;

(f) C is the weighting factor for a quarter of the rated washing capacity and rounded to three decimal places;

(g) for washing machines with a rated capacity lower than or equal to 3 kg and washer-dryers with a rated washing capacity lower than or equal to 3 kg—

(i) A is equal to 1;

(ii) B and C are be equal to 0;

(h) for other washing machines and washer-dryers, the values of the weighting factors depend on the rated capacity according to the following equations—

(i) A = -0.0391 × c + 0.6918;

(ii) B = -0.0109 × c + 0.3582;

(iii) C = 1 - (A + B);

where c is the rated capacity of the washing machine or the rated washing capacity of the washer dryer.