# The Energy Information (Household Refrigerators and Freezers) Regulations 2004, Paragraph 1

Extent: E+W+S+NI

(1) An appliance shall be classified as A+ or A++ where the energy efficiency index alpha (I) is within the ranges specified in Table 1.
Table 1
Energy efficiency index α(Iα)
“Energy efficiency class”
30 > Iα
A++
42 > Iα ≥ 30
A+
Iα ≥ 42
A to G (see below)
(2) The energy efficiency index alpha shall be calculated using the formula:
Iα=ACSCα×100 where—
“AC” means the annual energy consumption of the appliance (in accordance with the harmonised standards); and
“SCα” means the standard annual energy consumption α of the appliance.
“SCα” is calculated as:
MαX∑Compartments(Vc×(25−Tc)20×FF×CC×BI)+Nα+CH where—
“Vc” means the net volume (in litres) of the compartment (in accordance with the harmonised standards);
“Tc” is the design temperature (in °C) of the compartment;
the values of M and N are given in Table 2; and
the values of FF, CC, BI and CH are given in Table 3.
Table 2
Type of appliance
Temperature of coldest compartment
Mα
Nα
(1) For these appliances, the temperature and star rating of the compartment with the lowest temperature will determine the values of M and N. Appliances with –18°C *(***) compartments shall be considered as fridge-freezers *(***).
1. Larder Fridge
>-6°C
0.233
245
2. Refrigerator/chillers
>-6°C
0.233
245
3. Refrigerator no star
>-6°C
0.233
245
4. Refrigerator*
≤-6°C *
0.643
191
5. Refrigerator**
≤-12°C **
0.450
245
6. Refrigerator***/
≤-18°C ***/*(***)
0.777
303
7. Fridge/freezer *(***)
≤-18°C ***/*(***)
0.777
303
8. Upright freezer
≤-18°C *(***)
0.539
315
9. Chest freezer
≤-18°C *(***)
0.472
286
10. Multi-door or other appliance
Table 3
Correction factor
Value
Conditions
(1) An appliance is “built-in” only if it is designed exclusively for installation within a kitchen cavity with a need of furniture finishings, and tested as such.
FF (frost free)
1.2
1
For “frost free” (ventilated) frozen food compartments;
Otherwise
CC (climate class)
1.2
1.1
1
For “tropical” appliances;
For “subtropical” appliances;
Otherwise
BI (built-in)
1.2
1
For built-in appliances of under 58cm in width;
Otherwise
CH (chill compartment)
50 Kwh/y
0
For appliances with a chill compartment of at least 15 litres;
Otherwise
(3) If an appliance is not A+ or A++, it shall be classified in accordance with Part 2.

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Source: https://www.legislation.gov.uk/uksi/2004/1468/schedule/5/paragraph/1 (the official version)
Page: https://openlegislation.uk/energy-information-household-refrigerators-and-freezers-regulations-2004/schedule-5/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.