ANNEX IVMethod for calculating the Energy Efficiency Index

3.CALCULATION OF THE ENERGY EFFICIENCY INDEX

For the calculation of the Energy Efficiency Index (EEI), of a household refrigerating appliance model, the Annual Energy Consumption of the household refrigerating appliance is compared to its Standard Annual Energy Consumption.

  1. 1.

    The Energy Efficiency Index (EEI) is calculated and rounded to the first decimal place, as:

    EEI=AEcSAEc×100math

    where:

    — AEC

    Annual Energy Consumption of the household refrigerating appliance

    — SAEC

    Standard Annual Energy Consumption of the household refrigerating appliance.

  2. 2.

    The Annual Energy Consumption (AEC) is calculated in kWh/year and rounded to two decimal places, as:

    AEc = E24h × 365

    where:

    • E24h is the energy consumption of the household refrigerating appliance in kWh/24h and rounded to three decimal places.

  3. 3.

    The Standard Annual Energy Consumption (SAEC) is calculated in kWh/year and rounded to two decimal places, as:

    SAEc = Veq × M + N + CH

    where:

    • Veq is the equivalent volume of the household refrigerating appliance

    • CH is equal to 50 kWh/year for household refrigerating appliances with a chill compartment with a storage volume of at least 15 litres

    • the M and N values are given in Table 7 for each household refrigerating appliance category.

Table 7M and N values by household refrigerating appliance category

Category

M

N

1

0,233

245

2

0,233

245

3

0,233

245

4

0,643

191

5

0,45

245

6

0,777

303

7

0,777

303

8

0,539

315

9

0,472

286

10

14

14

Note:

for Category 10 household refrigerating appliances the M and N values depend on the temperature and star rating of the compartment with the lowest storage temperature capable of being set by the end-user and maintained continuously according to the manufacturer’s instructions. When only an ‘other compartment’ as defined in Table 2 and Annex I, point (p), is present, the M and N values for Category 1 are used. Appliances with three-star compartments or food-freezer compartments are considered to be refrigerator-freezers.