Paragraph 2

United Kingdom

The energy efficiency class of an appliance shall be determined in accordance with Table 4.

Table 4

Energy efficiency index: I	Energy efficiency class
I < 55	A
55 ≤ I < 75	B
75 ≤ I < 90	C
90 ≤ I < 100	D
100 ≤ I < 110	E
110 ≤ I < 125	F
125 ≤ I	G

where—

“energy efficiency index” (expressed as a percentage) = annual energy consumption of appliance in accordance with the harmonised standards / standard annual energy consumption of appliance;
“standard annual energy consumption of appliance” (expressed in kWh/year) = M × adjusted net volume + N;

“adjusted net volume” (expressed in litres) = net volume of fresh food compartment + Ω × net volume of frozen food compartment; andthe values of M, N and Ω are taken from Table 5.

Table 5

Category of Appliance	Ω	M	N
(1) For refrigerator/chiller the adjusted volume = net volume of fresh food compartment + Ω × net volume of chiller (10°C) compartment (expressed in litres).
(2) For ‘no frost’ appliances as defined in the harmonised standards, this index is increased by a provisional factor of 1.2 giving a value of 2.58 (this allows for the possible bias of the measurement method, which does not allow for the lack of ice build-up on “no frost” appliances. In practice, ice build-up will somewhat increase the consumption of “conventional” appliances).
(3) Adjusted net volume (AV) shall be calculated by the formula: $A V = \sum_{all compartments} \frac{(25 - T_{c})}{20} \times V_{c} \times F_{c}$ where— “T_c” is design temperature (in °C) of each compartment; “V_c” is the net volume (in litres) of each compartment; and “F_c” is a factor which equals 1.2 for “no frost” compartments and 1 for other compartments.
(4) For these appliances, the values of M and N shall be determined by the temperature and star rating of the compartment with the lowest temperature, in accordance with Table 6.
1. Larder fridge	—	0.233	245
2. Refrigerator/chiller	0.75^f1	0.233	245
3. Refrigerator no star	1.25	0.233	245
4. Refrigerator*	1.55	0.643	191
5. Refrigerator**	1.85	0.450	245
6. Refrigerator***	2.15	0.657	235
7. Fridge/freezer(**)	^f2	0.777	303
8. Upright freezer	2.15^f3	0.472	286
9. Chest freezer	2.15	0.446	181
10. Multi-door or other appliances		^f4

Table 6

Temperature of coldest compartment	Equivalent category	M	N
>-6c	1 Larder fridge 2 Refrigerator/chiller 3 No-star refrigerator	0.233	245
≤ -6°C *	4 Refrigerator (*)	0.643	191
≤ -12°C **	5 Refrigerator (**)	0.450	245
≤-18°C ***	6 Refrigerator (***)	0.657	235
≤-18°C (**)with freezing capacity	7 Fridge/freezer (**)	0.777	303

Annotations

Footnotes

f1

(1)

For refrigerator/chiller the adjusted volume = net volume of fresh food compartment + Ω × net volume of chiller (10°C) compartment (expressed in litres).

f2

(3)

Adjusted net volume (AV) shall be calculated by the formula:

A V = \sum_{all compartments} \frac{(25 - T_{c})}{20} \times V_{c} \times F_{c}

where—

“T_c” is design temperature (in °C) of each compartment;
“V_c” is the net volume (in litres) of each compartment; and
“F_c” is a factor which equals 1.2 for “no frost” compartments and 1 for other compartments.

f3

(2)

For ‘no frost’ appliances as defined in the harmonised standards, this index is increased by a provisional factor of 1.2 giving a value of 2.58 (this allows for the possible bias of the measurement method, which does not allow for the lack of ice build-up on “no frost” appliances. In practice, ice build-up will somewhat increase the consumption of “conventional” appliances).

f4

(4)

For these appliances, the values of M and N shall be determined by the temperature and star rating of the compartment with the lowest temperature, in accordance with Table 6.