Commission Regulation (EC) No 643/2009 of 22 July 2009 implementing Directive 2005/32/EC of the European Parliament and of the Council with regard to ecodesign requirements for household refrigerating appliances (Text with EEA relevance) (c. 643)

ANNEX IV U.K. Method for calculating the Energy Efficiency Index

2. CALCULATION OF THE EQUIVALENT VOLUME U.K.

The equivalent volume of a household refrigerating appliance is the sum of the equivalent volumes of all compartments. It is calculated in litres and rounded to the nearest integer as:

where:

• n is the number of compartments

• V_c is the storage volume of the compartment(s)

• T_c is the nominal temperature of the compartment(s) as set out in Table 2

• is the thermodynamic factor as set in Table 5

• FF_c , CC and BI are volume correction factors as set out in Table 6.

The thermodynamic correction factor is the temperature difference between the nominal temperature of a compartment T_c (defined in Table 2) and the ambient temperature under standard test conditions at + 25 °C, expressed as a ratio of the same difference for a fresh-food compartment at + 5 °C.

The thermodynamic factors for the compartments described in Annex I, points (i) to (p), are set out in Table 5.

Table 5

Thermodynamic factors for refrigerating appliance compartments

Compartment	Nominal temperature	(25 – Tc )/20
Other compartment	Design temperature
Cellar compartment/Wine storage compartment	+ 12 °C	0,65
Fresh-food storage compartment	+ 5 °C	1,0
Chill compartment	0 °C	1,25
Ice-making compartment and 0-star compartment	0 °C	1,25
One-star compartment	– 6 °C	1,55
Two-star compartment	– 12 °C	1,85
Three-star compartment	– 18 °C	2,15
Food freezer compartment (four-star compartment)	– 18 °C	2,15

Notes: U.K.

(i) for multi-use compartments, the thermodynamic factor is determined by the nominal temperature as given in Table 2 of the coldest compartment type capable of being set by the end-user and maintained continuously according to the manufacturer’s instructions; U.K.

(ii) for any two-star section (within a freezer) the thermodynamic factor is determined at T_c = – 12 °C; U.K.

(iii) for other compartments the thermodynamic factor is determined by the coldest design temperature capable of being set by the end-user and maintained continuously according to the manufacturer’s instructions. U.K.

Table 6

Value of the correction factors

Correction factor	Value	Conditions
FF (Frost-free)	1,2	For frost-free frozen-food storage compartments
	1	Otherwise
CC (climate class)	1,2	For T class (tropical) appliances
	1,1	For ST class (subtropical) appliances
	1	Otherwise
BI (built-in)	1,2	For built-in appliances under 58 cm in width
	1	Otherwise

Notes: U.K.

(i) FF is the volume correction factor for frost-free compartments. U.K.

(ii) CC is the volume correction factor for a given climate class. If a refrigerating appliance is classified in more than one climate class, the climate class with the highest correction factor is used for the calculation of the equivalent volume. U.K.

(iii) BI is the volume correction factor for built-in appliances. U.K.