# The Energy Information (Refrigerators and Freezers) Regulations 1994, Paragraph 1


(1) The energy efficiency class of an appliance shall be determined in accordance with Table 1 where—
“energy efficiency index” (expressed as a percentage) = annual energy consumption of appliance in accordance with note V to Figure 1 in Schedule 1 (the label)/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; and
the values of M, N and Ω are taken from Table 2.
TABLE 1
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
TABLE 2
Category of appliance
Ω
M
N
Notes to Table 2
(1) For refrigerator/cellars the adjusted volume = net volume of fresh food compartment + Ω × net volume of cellar (10°C) compartment (expressed in litres).
(2) For “no frost” appliances as defined in paragraph 1(12) of Schedule 2 (the information notice), 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:
AV=Σ(25-Tc)20×Vc×Fc all compartments
where Tc is design temperature (in °C) of each compartment, Vc is the net volume (in litres) of each compartment, and Fc 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 3:
1 Larder fridge
—
0.233
245
2 Refrigerator/cellar
0.75(1)
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*(***)
(3):
0.777
303
8 Upright freezer
2.15(2):
0.472
286
9 Chest freezer
2.15(2):
0.446
181
10 Multi-door or other appliances
(3):
(4):
(4):
TABLE 3
Temperature of coldest compartment
Equivalent category
M
N
> − 6 °C
1 Larder fridge; 2 refrigerator/cellar; 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

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Source: https://www.legislation.gov.uk/uksi/1994/3076/schedule/5/paragraph/1 (the official version)
Page: https://openlegislation.uk/energy-information-refrigerators-and-freezers-regulations-1994/schedule-5/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.