1 
  
 
مشروع  نهائي  
مواصفة قياسية عمانية  
 
 
 
الثلاجات والثلاجات مع مجمد والمجمدات –   
متطلبات أداء الطاقة و الاختبار والبطاقات  
Refrigerators, Refrigerator - Freezers and Freezers  - 
 Energy Performance, Testing and Labeling Requirements  
 
 
المديرية العامة للمواصفات والمقاييس  
وزارة التجارة والصناعة   
 
 
 
 
هذه الوثيقة مشروع لمواصفة قياسية عمانية تم توزيعها لإبداء الرأي والملاحظات بشأنها، لذلك فإنها عرضة للتغيير 
والتبديل، ولايجوز الرجوع إليها كمواصفة قياسية عمانية معتمدة إلا بعد اعتمادها.  
 
 
 2 
  
تقديم 
المديرية العامة للمواصفات والمقاييس جهاز التقييس الوطني بالسلطنة أنشئت بموجب المرسوم السلطاني رقم  39/1976، ومن
مهامها إعداد المواصفات القياسية العمانية واللوائح الفنية استنادا للمرسوم السلطاني رقم   1/87 . 
وقد قامت دائرة المواصفات بالمديرية بإعداد هذه المواصفة القياسية العمانية الثلاجات والثلاجات مع مجمد والمجمدات  –  
متطلبات أداء الطاقة والاختبار والبطاقات" وقد تم إعداد المشروع باللغة الإنجليزية استنادا على المواصفة القياسية السعودية  
SASO 2892/2018 ( Refrige rators, Refrigerator - Freezers and Freezers   -  Energy 
Performance, Testing And Labeling Requirements )  
 واستعراض المواصفات القياسية الدولية والأجنبية والمؤلفات المرجعية  
وقد اعتمدت هذه المواصفة كمواصفة قياسية عمانية ملزمة، بتاريخ   /  /     ه، الموافق  /  /     م  
 
Forward  
General Directorate of Standardization and Metrology (DGSM) is the National 
standard body in Sultanate of Oman. It was established according to Royal   Decree 
No. 39/1976. DGSM is responsible of issuing Omani standards and technical 
regulations.  
Director of standards, in the DGSM has prepared this standard “ Refrigerators, 
Refrigerator - Freezers and Freezers   -  Energy Performance, Testing and Labeling 
Requirements ”. The draft standard has been prepared in English language base d on 
SASO 2892/2018 ( Refrigerators, Refrigerator - Freezers and Freezers   -  Energy 
Performance, Testing And Labeling Requirements ) , and relevant international and 
National foreign standard and references,  
This standards was approved as an Omani Technical Re gulation on /  /  /  H,    /     /    
 
 
 
  3 
  
Forward  ................................ ................................ ................................ ................................ ......................  2 
1. SCOPE  ................................ ................................ ................................ ................................ ..................  4 
2. NORMATIVE REFERENCES  ................................ ................................ ................................ ...............  5 
3 Terms, definitions and symbols  ................................ ................................ ................................  5 
5. CRITERIA FOR APPLYING THE MINIMUM ENERGY PERFORMANCE STANDARD (MEPS)  .... 16 
5.1 Declaration of rated values  ................................ ................................ ................................ .............  16 
5.2 Determining the Minimum Energy Performance  ................................ ................................ .............  16 
5.3 Acceptance criteria for labeling and market surveillance  ................................ ...............................  17 
5.3.1 Accepted climate class  ................................ ................................ ................................ .................  17 
6. LABEL AND CLASSIFICATION  ................................ ................................ ................................ .........  17 
6.1 De termining the energy efficiency class  ................................ ................................ .........................  17 
6.2 Design and placement of the label  ................................ ................................ ................................ .. 17 
6.3 Information and values contained on the label  ................................ ................................ ...............  18 
7. MARKING AND INSTRUCTIONS  ................................ ................................ ................................ ...... 21 
7.1 Ge neral information  ................................ ................................ ................................ .........................  21 
7.2 Nameplate information  ................................ ................................ ................................ ....................  21 
7.3 Instruction sheet  ................................ ................................ ................................ ..............................  21 
8. REGISTRATION REQUIREMENTS  ................................ ................................ ................................ .. 22 
ANNE X A – Application for registration or renewal of registration of refrigerators, refrigerators -freezers 
and freezers for energy efficiency (informative)  ................................ ................................ .....................  23 
ANNEX B – Calculation of the energy efficiency index (EEI)  ................................ ................................  26 
 
 
 
 
 
 
 
 
 
 
 4 
 Refrige rators, Refrigerator - Freezers a nd Freezers - 
Energy Performance, Testing a nd Labeling Requirements   
1. SCOPE 
This standard specifies the Minimum Energy Performance Standard (MEPS) , energy efficiency 
labelling and testing requirements of  electric powered  refrigerators, refrigerator -freezers and 
freezers  being manufactured, imported and sold in Oman .  
This standard applies to:  
(a)  Refrigerators, refrigerator -freezers, and freezers that are electrically operated on a 50 Hz 
alternating current, wi th a nomi nal supply voltage of 240 V, including built -in appliances  
(b)  Refrigerators and refrigerator -freezers with a capacity up to 1 500 liters (53 𝑓𝑡3)    
(c)  Freezers with a capacity up to 850 liters (30 𝑓𝑡3) 
The requirements in this standard are not applicable to refrigerators employing an absorption 
refrigeration system and for commercial refrigerators, refrigerators -freezers and freezers.  
The values in the standard are in SI (metric) units. Any values given in parentheses are for 
information only.  
 This Standard shall not apply to:  
(a) Refrigerating appliances primarily powered by energy sources other than electricity, such as 
liquefied petroleum gas (LPG),  kerosene and bio -diesel fuels  
(b) B attery -operated refrigerating appliances  that can be connected to the mains through an 
AC/DC converter, purchased separately  
(c) Custom -made refrigerating appliances, made on a one -off basis and not equivalent to other 
refrigerating appliance models  
(d) Refrigerating appliances for tertiary sect or application  where the removal of refrigerated 
foodstuffs is electronically sensed and that information can be automatically transmitted through 
a network connection to a remote  control system for accounting  
(e) A ppliances where the primary function is n ot the storage of foodstuffs through refrigeration, 
such as stand -alone ice - makers or chilled drinks dispenser  
 
 
 
 
 
 5 
 2. NORMATIVE REFERENCES 
The following  normative  reference standards apply. However, this standard supersedes the 
below reference standards in case of conflicting requirements.  
• GSO 1899: 2016 "GCC Standard Voltages and Frequencies for Alternating Current 
Distribution  Systems"  
• IEC 62552 -1:201 5 
• IEC 62552 -2:201 5 
• IEC 62552 -3:201 5 
• EU Directive 2019/2016   
In case of update of the IEC s tandards mentioned as adoption hereinabove, the updated version 
shall be effective after 2 years of the last international update.  
If the adopted IEC standard is withdrawn, then the updated version / replacing standard shall be 
effective immediately.  
3  Terms, definitions and symbols  
 
For the purposes of this document, the following terms, definitions and symbols apply.  
3.1 General terms and definitions  
3.1.1  
refrigerating appliance  
insulated cabinet with one or more compartments that are controlled at specific temperatures and are of 
suitable size and equipped for household use, cooled by natural convection or a forced convection 
system whereby the cooling is obtained by one or more energy -consuming means  
 
Note 1 to entry: From the point of view of installation, there are various  types  of  household  refrigerating  appliances 
(free -standing, portable, wall -mounted, built -in, etc.).  
 
3.1.2  
refrigerator  
refrigerating appliance intended for the storage of foodstuff , with at least one fresh food 
compartment  
 
3.1.3  
refrigerator -freezer  
refrigerating appliance having at least one fresh food compartment and at least one  
freezer compartment  
 
3.1.4  
frost -free refrigerating appliance  
refrigerating appliance in which  all compartments are automatically defrosted  with automatic 
disposal of the defrosted water and at least one compartment is cooled by a frost - free system  
 
 
3.1.5  
freezer  
refrigerating appliance with only frozen compartments , at least one of which is a freezer 6 
 compartment  
 
3.1.6  
Special beverages storage appliance : refrigerating appliance that has no compartment other than 
one or more special beverages  compartment (s) 
Note 1 to entry: An appliance containing any compartments which do not fulfil all requirements as specified for  
special beverages compartments under Annex G cannot be categorised as a special beverages storage.  
 
3.1.7  
built -in appliance  
refrigerating appli ance intended to be used whilst fastened in an enclosure or secured in a prepared 
recess in a wall or similar location  
 
3.1.8  
 
foodstuff  
food and beverages intended for consumption  
 
3.1.9  
rated  
value declared by the manufacturer (e.g. volume, energy consumption , usage)  
 
3.1.10  
normal use  
operation when the refrigerating appliance is subjected to a range  of  different conditions  that 
could  occur  during  use including  operation  in a range  of: 
 
– indoor temperatures  (including  those  defined  in  the  Storage  Test,  see  Clause 6  of  IEC 
62552 -2:2015),  
– different humidity levels  and 
– user-related actions, such as door openings (which may be regular,  infrequent  or  a  mixture  
thereof)  and the addition  and removal  of foodstuff  or other  stored  items  
 
3.2 Terms and definitions related to refrigerating system  
 
3.2.1  
refrigerant  
fluid used for heat transfer in a refrigerating system, which absorbs heat at a low temperature and 
at a low pressure of the fluid and rejects heat at a higher temperature and at a higher pressure of 
the fluid, usually involving changes of phase of the fluid 
 
3.2.2  
condenser  
heat exchanger from which heat in the refrigerant is rejected to an external cooling medium (usually the 
air surrounding the appliance)  
 
3.2.3  
evaporator  
heat exchanger which absorbs heat from the compartment to be refrigerated and transfers  this to 
the refrigerant  
 
3.3 Compartments and sections  
 3.3.1 compartment  7 
 enclosed space within a refrigerating appliance , which is directly accessible through one or more 
external doors, which may itself be divided into sub-compartments  
 
Note 1  to  entry:   The   requirements   for   the   following   compartment   types   are   specified   in   Table   2   of IEC 
62552 -2:2015 and Table 1 of IEC 62552 -3:2015  
 
Note 2 to entry: Throughout this standard, unless specified otherwise, " compartment " shall be taken to mean  
compartment and/or sub-compartment as appropriate for the context.  
 
3.3.2  sub-compartment  
permanent  enclosed space  within  a compartment which  has a different  operating temperature 
range from the compartment within which it is located  
 
3.3.3convenience feature  
enclosure, or a container (either fixed or removable by the user), in which suitable storage conditions are 
provided for designated types of foodstuff  
 
Note 1 to entry: These conditions may be different from those of the compartment in which it is located.  
 
3.3.4  
variable temperature compartment  
compartment intended for use as two (or more) alternative compartment types (e.g. a 
compartment that can be either a fresh food compartment or freezer compartment ) and which 
is capable of being set by a user to continuously maintain the operating temperature range 
applicable for each compartment type claimed  
 
Note 1 to entry: A compartment intended for use as a single type but that can also meet additional types (e.g. a  
chill compartment that may also fulfil zero-star requirements) is not a variable temperature compartment.  
 
 
3.3.5  
freezer compartment  
compartment that meets three -star or four -star requirements  
 
Note 1 to entry: In certain instances, two-star sections and/or sub-compartments are permitted within the  
compartment.  
 
3.3.6  
fresh food compartment  
compartment for the storage and preservation of unfrozen foodstuff  
 
3.3.7  
cellar compartment  
compartment for the storage of foodstuff at a temperature that is warmer than that of a 
fresh food compartment  
 
3.3.8  
pantry compartment  
compartment for the storage of foodstuff at a temperature that is warmer than that of a 
cellar compartment  
 
3.3.9  
chill compartment  
compartment for the storage of highly perishable foodstuff  
 
 
3.3.10  
ice-making compartment  
compartment specifically for the making and storage of ice  
 8 
 Note 1 to entry: an ice-making compartment is classified as a  zero -star  compartment  or  a  frozen  compartment . 
 
3.3.11  
ice mould  
form in an automated icemaker which is automatically filled with water and from which the ice cubes are 
automatically ejected  
 
3.3.12  
ice cube tray  
removable tray which is manually filled with water and from which ice cubes are manually ejected  
 
Note 1  to entry:   Ice cube trays with water are used as load in  order to determine load  processing efficiency .   See 
Annex G of IEC 62552 -3:2015.  
 
3.3.13  
zero-star compartment  
compartment in which the temperature is not warmer than 0 °C that can be used for the  making 
and storage of ice but is not suitable for the preservation  of  highly  perishable foodstuff  
 
3.3.14  
Specific beverage  compartment  
compartment specifically for the storage and maturation of certain beverages  
 
3.3.15  
unfrozen compartment  
any of the following compartment types: zero-star, chill, fresh food, cellar, wine storage or 
pantry  
 
Note 1 to entry: although ice-making compartments and zero star compartments operate below zero, they are configured as 
unfrozen compartments for energy and performance tests in this standard.  
 
3.3.16  
frozen compartment  
any of the following compartment types: one-star, two-star, three -star, four -star 
 
Note 1 to entry: frozen compartments are classified according to temperature, see 3.3.16.1 to 3.3.16.4.  
 
3.3.16.1  
one-star 
compartment where the storage temperature is not warmer than –6 °C 
 
3.3.16.2  
two-star 
compartment where the storage temperature is not warmer than –12 °C  
 
3.3.16.3  
three -star 
compartment where the storage temperature is not warmer than –18 °C  
 
 
3.3.16.4  
four-star 
compartment where the storage temperature meets three -star conditions and where the minimum 
freezing capacity meets the requirements of Clause 8 of IEC 62552 -2:2015  
 
Note 1  to entry:  In certain instances, two-star sections and/or sub-compartments are  permitted within a  four -   star 
compartment.  
 
3.3.17  
two-star section  9 
 part of a three -star or four -star compartment , which is not  self-contained (i.e.,  does  not have  
its own individual  access  door  or lid) and which  meets  two-star requirements  
 
Note 1 to entry: Any two-star section in the compartment shall not exceed  20 %  of  the  total  compartment  volume . 
 
3.3.18  
vegetable drawer or crisper  
convenience feature provided primarily to retard dehydration of fruits and vegetables  
 
Note 1 to entry:  A  vegetable drawer is  usually considered as  a  removable convenience feature but is  normally  left in 
situ for testing  purposes.  
3.4 Physical aspects and dimensions  
3.4.1    
top-opening type  
refrigerating appliance in which the compartment (s) are accessible from the  top  (usually  via a 
lid) 
 
3.4.2  
upright type  
refrigerating appliance in which the compartment (s) are accessible from the front  
 
3.4.3  
overall dimensions  
space taken up by the refrigerating appliance (height, width and depth) with doors or lids closed  
 
3.4.4  
space required in use  
space taken up by the refrigerating appliance (height, width and depth) necessary  for  normal 
use with doors or lids closed, including space necessary for air circulation and any handles .  
 
3.4.5  
overall space required in use 
total space taken up by the refrigerating appliance (height, width and depth) necessary for  
normal use with doors or lids open . 
 
3.4.6  
volume  
space within the inside liner of the refrigerating appliance , or a compartment or sub  
compartment as determined in IEC 62552 -3:2015  
 
3.4.7  
shelf  
horizontal surface on which foodstuff can be placed  
 
Note 1 to entry: A shelf can  be  formed by  one  component or  by  components fitted side by  side,  which can  be  fixed or  
removable.  
 
3.4.8  
load limit  
surface enveloping a storage space and intended for the storage of foodstuff or other items  
 
Note 1 to entry: A load limit may be a natural obvious feature or a marked line.  
 
3.4.9  
storage plan  
arrangement of test packages within a refrigerating appliance when testing specific aspects  of 
performance in accordance with this standard  10 
 3.5 Terms and definitions relating to performance characteristics  
3.5.1  
energy consumption  
energy used by a refrigerating appliance over a specified period of time or for a specified operation as 
determined in accordance with IEC 62552 -3:2015  stated in kWh (kilowatt hour)  
 
3.5.2  
average power consumption  
average rate of energy consumption of a refrigerating appliance for a specific  test  condition  or 
operation  as determined  in accordance  with IEC 62552 -3:2015  measured  in watt (W) 
 
3.5.3  
storage temperature  
temperature which the refrigerating appliance is capable of maintaining in accordance with 6.5 of 
IEC 62552 -2:2015  
 
3.5.4  
target temperature  
reference compartment temperature which is used for determining energy and average   power 
consumption attributes in IEC 62552 -3:2015  
 
Note 1 to entry: Target temperatures are air temperatures.  
 11 
 3.5.5   
Defrosting  
3.5.5. 1 
automatic defrost  
defrosting where no action is necessary by the user to initiate the removal of  frost  accumulation at 
all temperature -control settings or to restore normal operation, and the disposal of the defrost 
water is automatic  
 
3.5.5.2  
manual defrost  
defrost that is not an automatic defrost  
 
3.5.5.3  
cyclic defrost  
automatic defrost system  where the refrigerated surfaces which cool a compartment  (usually 
an unfrozen compartment) in an appliance  are automatically defrosted and defrosting occurs 
during each cycle of the refrigeration system  
 
Note 1 to entry: Cyclic defrost systems do not have a defrost control cycle.  
 
3.5.5.4  
variable defrost  
automatic defrost system designed to minimise energy consumption which adjusts the time 
intervals between successive defrosts under normal use to better match the actual frost load on 
the evaporator by the assessment of an  operating condition (or conditions) other than, or  in 
addition to, elapsed time or compressor run time 
 
Note 1 to entry: Demand defrost, (directly measuring the frost on the evaporator and  defrosting accordingly) is  a  form of 
variable  defrost.  
 
3.5.6  
stable operating conditions  
conditions in which a refrigerating appliance mean temperatures and energy consumption comply with 
the relevant stability requirements as defined in IEC 62552 -2 or IEC 62552 -3 as applicable  
 
3.5.7  
steady state  
stable  operating  conditions  that meet  the criteria  as specified  in Annex  B of 
IEC 62552 -3:2015  
 
3.5.8  
ambient temperature  
measured temperature in the space surrounding the refrigerating appliance under test  
 
Note 1  to entry:   The ambient temperature for each test type is measured as specified in Annex A  of this Part and   its 
value is as specified in IEC 62552 -2:2015 and IEC 62552 -3:2015 of this standard as applicable for the particular test.  
 
3.5.9  
control event  
change in operating conditions  
 
Note 1 to entry: Control events include but are not limited to — 
a) starts, stops or speed changes of compressors;  
b) changes  of baffle  position,  fan operation,  or other  modulating  control  or device;  
c) changes in operation of the refrigerant  circuit;  
d) defrost heater on and  off; 
e) icemaker  operation.  
 
3.5.10  
frost -free 
automatic defrost  system  to prevent the permanent formation of frost  on a remote  
evaporator or evaporators  12 
  
3.5.11  
temperature control  
device that is intended to automatically regulate the temperature within one or more  
compartments  
 
Note 1 to entry: Unless otherwise stated, a two position (e.g. open or closed) control is not included  within the  meaning of 
a temperature  control . 
 
3.5.12  
user -adjustable temperature control  
temperature control intended for adjustment by the user  to  vary the temperature within one  or 
more compartments within a refrigerating  appliance  
 
3.5.13  
temperature control setting  
setting of a user -adjustable temperature control selected for the measurement of energy or 
performance in accordance with this standard  
 
3.5.14  
cooling time  
time taken for a specified load in a fresh food compartment to be  cooled as  defined in  Clause 7 
of IEC 62552 -2:2015  
 
3.5.15  
cooling capacity  
rate at which a specified load in a fresh food compartment can be cooled as  defined in Clause 7 
of IEC 62552 -2:2015  
 
3.5.16  
freezing time  
time to freeze in a freezer or freezer compartment a set amount of load as defined in Clause  8 of 
IEC 62552 -2:2015  
 
3.5.17  
freezing capacity  
rate of heat extraction by the refrigeration system from a load in a freezer or freezer compartment as 
defined in Clause 8 of IEC 62552 -2:2015  
 
3.5.18  
ice-making capacity  
quantity of  ice the refrigerating appliance is capable of  producing in an automatic icemaker  in 
accordance with Clause 9 of IEC 62552 -2:2015  
 
3.5.19  
temperature rise time  
time taken, after the operation of the refrigerated system has been interrupted, for the temperature  
to  increase  a  defined  amount  when  tested  as  specified  in   Annex  C   of   IEC 62552 -2:2015  
 
3.5.20  
ballast load  
combination of test and M -packages already at storage temperature and in the freezer or 
freezer compartment when the light load is added during the freezing capacity test 13 
  
3.5.21  
light load  
combination of test and M -packages at ambient temperature that are loaded into a freezer 
compartment during the freezing capacity  test 
 
3.5.22  
processing load efficiency test  
test in which a specified water  load is  introduced to the appliance to determine how much  extra  
energy  is needed  to cool it down  (and,  in frozen  compartments , freeze  it) 
 
Note 1 to entry: See Annex G of IEC 62552 -3:2015.  
 
3.5.23  
processing load  
energy equivalent of a user processing load in Wh/day  
 
3.5.24  
load processing efficiency  
ratio of additional energy used by the refrigerating appliance to cool a specified processing load to the 
calculated heat energy removed from that processing load  
 
3.5.25  
processing load recovery period  
time taken to reach stable operating conditions after introduction of  the specified load for  the 
processing load efficiency  test 
        3.6.1  
        temperature control cycle  
definite repetitive swings in temperature caused by operation of a temperature  control  
device (on/off or otherwise)  
 
Note 1  to entry:  The period of  a  temperature control cycle is the time between a  control event and its repetition  on 
the next cycle.   Where the control events cannot be discerned, the  period of  a  temperature control cycle is   the time 
between two successive temperature warmest points or two successive temperature coldest  points.  
 
3.6.2  
defrost control cycle  
period commencing at the end of stable operating conditions prior to the initiation of an  
automatic defrost and terminating at a like point prior to the next automatic defrost  
 
Note 1 to entry: The commencement and finish points of the defrost control cycle prior to automatic defrosting  
shall be:  
a) for a refrigerating system with on/off cycles, the period commencing at the end of the last regular temperature 
control  cycle  (for example  the end of last off period);  
b) for a refrigerating system without on/off cycles but with regular temperature cycles, at the last power/speed/cooling 
change that relates to a regular temperature maximum;  and 
c) for a refrigerating system without on/off cycles and without regular temperature cycles, at the end of stable 
temperature  operation.  
 
Note 2 to entry: Cyclic defrost systems do not have a defrost control cycle.  
 
3.6.3  
defrosting operation  
period from the initiation of a defrost control cycle until the initiation of the refrigeration  system 
cooling after  defrosting   
14 
  
3.6.4  
defrost and recovery period  
period from the initiation of a defrost control cycle until stable operating conditions are 
established  
 
Note 1 to entry: For products that do not reach  stable  operating  conditions  (for  example  that  have  a 
temperature that is  continually decreasing after a  defrosting operation ), the defrost and  recovery period 
could   be equal to the defrost control  cycle . 
 
             3.6.5  
recovery period  
period from the end of the defrosting operation until the end of the defrost and 
recovery period  
 
Figure 1 Illustration of selected definitions 1 
 
4. PRODUCT CATEGORIES  
Refrigerating appliances are  also classified in to one or more climate classes as shown in Table 
1. 
 
1 Source: IEC 62552:2015  
 
15 
 Table 1Climate class  
Table 2 – Climate classes  
Class  Symb
ol Ambient average temperature 
(0C) 
Extended temperate  SN +10 to +32  
Temperate  N +16 to +32  
Subtropical  ST +16 to +38  
Tropical  T +16 to +43  
The refrigerating appliance shall be capable of maintaining the required storage temperatures in 
the different compartments simultaneously and within the permitted temperature deviations 
(during the defrost  cycle) as defined in Table 2 for the different types of refrigerating appliances 
and for the appropriate climate classes.  
Multi -use appliances and/or compartments sha ll be capable of maintaining the required storage 
temperatures of the different compartment types where these temperatures can be set by the 
end-user according to the manufacturer’s instructions.  
Table 2Storage conditions and target temperature per compartment type  
Compartment 
type Name of 
compartment  Storage condition  Target 
temperature  Note  
𝑻𝒎𝒊𝒏℃ 𝑻𝒎𝒂𝒙℃ 𝑻𝑪℃ 
Unfrozen  Pantry  +14 +20 +17 𝑇𝑚𝑖𝑛 & 𝑇𝑚𝑎𝑥are the average 
values measured over the test 
period (average over time and 
over a set of sensors).  
Specific 
Beverage  +5 +20 +12 • The average temperature 
variation over the test period 
for each sensor shall be no 
more than ± 0,5 kelvin (K). 
During a defrost and 
recovery period the average 
of all sensors is not 
permitted to rise more than 
1,5 K above the average 
value of the compartment.  
 
• 𝑇𝑚𝑖𝑛 & 𝑇𝑚𝑎𝑥are the average 
values measured over the 
test period (average over 
time for each sensor) and 
define the maximum 
allowed temperature 
operating r ange  
Cellar  +2 +14 +12 𝑇𝑚𝑖𝑛 & 𝑇𝑚𝑎𝑥are the average 
values measured over the test 
period (average over time and 
over a set of sensors).  Fresh food  0 +8 +4 
Chill  Chill -3 +3 +2 𝑇𝑚𝑖𝑛 & 𝑇𝑚𝑎𝑥are instantaneous 
values during the test period.   
16 
 Compartment 
type Name of 
compartment  Storage condition  Target 
temperature  Note  
𝑻𝒎𝒊𝒏℃ 𝑻𝒎𝒂𝒙℃ 𝑻𝑪℃ 
Frozen  0-star & ice -
making Not 
applicable  0 0 𝑇𝑚𝑎𝑥 is the maximum value 
measured over the test period 
(maximum over time and over a 
set of sensors).  1-star Not 
applicable  -6 -6 
2-star Not 
applicable  -12 -12 • 𝑇𝑚𝑎𝑥 is the maximum value 
measured over the test 
period (maximum over time 
and over a set of sensors).  
• If the compartment is of the 
auto-defrosting type, the 
temperature (defined as the 
maximum of all sensors) is 
not permitted to ris e more 
than 3,0 K during a defrost 
and recovery period.  3-star Not 
applicable  -18 -18 
Freezer (4 -
star) Not 
applicable  
-18 -18 
5. CRITERIA FOR APPL YING THE MINIMUM ENERGY 
PERFORMANCE STANDARD (MEPS) 
5.1 Declaration of rated values  
The declaration of the rated capacity shall be expressed only in terms of liters (l) according to 
the following rules : 
• The declaration of the rated capacity shall be expressed in liter (l) as multiples of 1 liter 
• The declaration of the rated power shall be expressed in terms of watt (W) as multiples of 
10 W  
• The declaration of the energy efficiency shall be expressed in % as a multiple of 0.1%  
• The rated annual energy shall be expressed in kWh as a multiple of 1 kWh  
5.2 Determining the Minimum Energy  Performance  
5.2.1 General  
The Minimum energy performance is  based on the Energy Efficiency Index (EEI) which is 
established from the comparison with a reference appliance.  
Details for calculation of the EEI are given in Annex B.  
5 5.2.2 Minimum Energy Performance Standard for Refrigerating Appliances  
Refrigerating  appliances within the scope of this Standard with a storage volume equal 
to or higher than 10 liters shall comply with the energy efficiency index limits in Table 3. 
 
Table 3Minimum Energy Performance Standards  
Table 5 – Minimum Energy Efficiency Index (EEI)  
EEI <125  
17 
 5.3 Acceptance criteria for labeling  and market surveillance  
The energy label shall be accepted as valid when a sample unit(s) tested meets the criteria 
specified in Table 4. 
Table 4Acceptance criteria  
Table 6 – Acceptance criteria  
Measured parameter  Verification tolerances  
Gross (total) volume  The measured value shall not be less than the rated value by more than 
3% or 1 liter, whichever is the greater value  
Storage volume  The measured value shall not be less than the rated value by more than 
3% or 1 liter, whichever is the greater value. Where  the volume of the cellar 
compartment and fresh food storage compartment are adjustable, relative 
to one another by the user, this measurement uncertainty applies when the 
cellar compartment is adjusted to its minimum volume.  
Frozen -food storage volume  The measured value shall not be less than the rated value by more than 
10% 
Energy consumption  The measured value shall not be greater than the rated value (E 24h) by 
more than 10%  
Power consumption of 
refrigerating appliances with a 
storage volume below 10 liters The measured value shall not be greater than the limit value laid down in by 
more than 0.10W at the 95% confidence level  
Specific beverage appliances  The value of the rela tive humidity shall not exceed the nominal range by 
more than 10%  
 
5.3.1 Accepted climate class  
Tropical climate class as defined in Table 1 is the only climate class allowed for refrigerators, 
refrigerator -freezers and freezers in the member states.  
6. LABEL AND CLASSIFICATION 
6.1 Determining the energy efficiency class  
The energy efficiency class for each product shall be determined as outlined in Table 5, with 
limit values rounded to two decimals.  
6.2 Design and placement of the label 2 
The label shall be printed, visible, and fixed on both the product and the package (as illustrated 
in Figure 2 and Figure 3).  
The energy efficiency classes shall each be represented as follows: with a fixed number of 
colour -coded bars as outlined in Table 5 and illustrated in Figure 2.  
The label must be 100 mm wide and 170 mm high; if the label shall be printed in a larger format 
its contents must remain p roportionate.  
 
2 The label format and layout are provided for illustrative purposes and the final design and future updates 
will be available on Omani  Standards, Directorate General for Standards and Metrology  (DGSM)  
registration system.   
18 
 The label shall be on the most prominent part of the product packaging to be easily visible to the 
consumer.  
Table 7 – MIMIMUM VALUE OF THE ENERGY EFFICIENCY INDEX  
Table 5Energy Efficiency class of refrigerating appliances  
Bar colour  Energy class  EEI 
Dark green  أ A          EEI < 51 
Green  ب B  51 < EEI ≤ 64   
Light green  ج C  64 < EEI ≤ 80  
Yellow  د D  80 < EEI ≤ 100 
Orange  هـ E  100 < EEI ≤ 125 
Red و F  125 < EEI 
Dark Red  ز G Not applicable  
 
6.3 Information and values contained on the label  
The fields (a), (b), (c), (d), (e), (f), (g) and (h) shall comply with the following requirements:  
• Field (a): this field shall display the logo of the Omani  Standards, Directorate General for 
Standards and Metrology  (DGSM) . 
• Field (b):  this field shall reflect the energy efficiency class, which the product attained.  
• Field  (c): this field identifies Storage Volume rounded to the nearest integer; the volume 
for food storage (if any) in  liters.  
• Field (d): this field identifies the Frozen food storage Volume rounded to the nearest 
integer and s tar rating of the compartment with the highest share of that sum; where the 
refrigerating appliances has no frozen -food storage compartment(s) the supplier shall 
declare ‘ - L’ instead of a value and leave the position for star rating blank; freezer (if any) 
in liters.  
• Field (e): this field identifies the annual energy consumption of the appliance.  
• Field (f):  this field identifies the category of product.  
• Field (g):  this field shall have a QR code representing the main characteristics of the 
refrigerator, refrigerator - freezer or freezer, this may include the following items based on 
the data provided in the registration form:  
o Manufacturer name  
o Model number  
o Country of origin  
o Product category  
o Rated power (W)  
o Rated voltage (V)  
o Rated capacity for food storage as expressed in field d (liter and cubic feet)  
o Rated capacity for storage compartment as expressed in field e (liters and cu bic 
feet)  
o Climate class: SN, N, ST or T (could be one or more classes)  
o Classification (unit -less)  
o Annual energy consumption (AE) in kWh   
19 
 • Field (h): this field identifies the general product information: brand name, country of 
origin and model number.  
• Field  (i): this field shall reflect the registration number and standard reference number.  
• Field (j): this field shall reflect the legal statement attached to energy efficiency labels.  
 
 
 
 
 
 
 
Figure 2Illustration of the label (informative)  
 
 
20 
  
Figure 3  Position of information on the label  
(e) (a) 
(b) 
(j) (c) 
(d) (f) 
(g) (h) 
(i)  
21 
 7. MARKING AND INSTRUCTIONS 
7.1 General information  
The following information shall be marked on the nameplate of the refrigerator, refrigerator - 
freezer or freezer  in Arabic and English.  The marking shall not be on a detachable part of the 
unit and shall be indelible, durable and easily legible.  
Any information related to energy performance added on any part of the refrigerator, 
refrigerat or- freezer or freezer unit or packaging shall not have any ambiguity or lead to 
misunderstanding of the performance of the unit.  
7.2 Nameplate information  
The n ameplate information shall include, for conformity to this standard the following 
information:  
o Manufacturer name  
o Model number  
o Country of origin  
o Product category  
o Rated power (W)  
o Rated volume for food storage as expressed in field d ( liters and cubic feet)  
o Rated volume for frozen food storage as expressed in field e (lit ers and cubic 
feet)  
o Climate class shall be at least Tropical class  
o Rated voltage (V)  
o Rated Frequency (Hz)  
o Classification (unit -less)  
o Annual energy consumption (AE) in kWh  
7.3 Instruction sheet  
An instruction sheet or manual in Arabic and English shall be delivered with each refriger ator, 
refrigerator - freezer or freezer.  Tables, drawings and circuit diagrams may be depicted in 
English only.  
The instruction sheet or manual shal l include the following information as a minimum  
The information in the product fiche shall be provided in the following order and shall be 
included in the product brochure or other literature provided with the type of product.  
a) Supplier’s name or trade mar k 
b) Supplier’s model identifier  
c) Climate classes in accordance with Table 1. 
d) Energy efficiency class of the model in accordance with Table 5 
e) Annual energy consumption (AE) in kWh pe r year, rounded up to the nearest integer and 
calculated in accordance with Annex B . It shall be described as: ‘Energy consumption 
“XYZ” kWh per year, based on standard test results for 24 hours. Actual energy 
consumption will depend on how the appliance i s used and where it is located   
22 
 f) Storage volume of each compartment and applicable star categories  in accordance with 
Table 2. 
g) The design temperature of ‘other compartments’ within the meaning of Annex B  For 
special beverage storage compartments, the coldest storage temperature, either pre -set 
in the compartment or c apable of being set by an end -user and capable of being 
maintained continuously according to the manufacturer’s instructions, shall be given  
h) The mention ‘frost -free’ for the relevant compartment(s), as defined in Annex B. 
i) ‘Power cut safe  “X” h’ defi ned as ‘temperature rise time’  
j) ‘Freezing capacity’ in kg/24 h  
k) ‘Climate class’ in accordance with Table 1, and expressed as: ‘Climate class: W [climate 
class]. This appliance is intended to be used at an ambient temperature between “X” 
[lowest temperature] °C and “X” [highest temperature] °C’  
l) If the model is intended to be a built -in appliance, an indication to this  effect  
The information contained in the fiche may be given in the form of a copy of the label, either in 
color  or in black and white. Where this is the case, the information listed in point 1.1 not already 
displayed on the label shall also be provi ded.  
One instruction sheet may cover a number of refrigerating appliances models supplied by the 
same supplier.  
8. REGISTRATION REQUIREMENTS 
Product registration is mandatory, whereby information about registration requirements will be 
available in the i nformation center of the Omani  Standards, Directorate General for Standards 
and Metrology  (DGSM) , and reference shall be made to the separate DGSM  registration forms 
and requirements.  
For registration, a test report covering the product submitted shall be  attached. The test report 
shall be issued from an entity (laboratory) certified through ILAC  procedure or approved by 
DGSM . 
Applications shall be submitted through the registration system electronically via DGSM  
website. The applicant shall fulfill all up dated requirements of the electronic registration system 
and any new requirements, procedures, and regulations required by DGSM . A draft of the 
registration form has been provided below (the final version is the one present on the DGSM  
website).  
Labels are published by the registration application system after the final registration of a 
product.    
23 
 ANNEX A – Application for registration or renewal of 
registration of refrigerators, refrigerators -freezers and freezers 
for energy efficiency (informative)  
 
I hereby apply for the registration of a refrige rator, refrigerator - freezer or  freezer (s) for the purpose of energy 
efficiency.  
In the country of ………………………………………………………………………………………  
(specify the country in which this application is made ) 
 
SECTION (1) – APPLICANT DETAILS  
 
Name of applicant  ……………………………………………………………………………..  
Business address  ……………………………………………………………………………..  
P.O Box  ……………………………………………………………………………..  
Post code  ……………………………………………………………………………..  
Contact person  ……………………………………………………………………………..  
Position/title  ……………………………………………………………………………..  
Tel (……)………………………………………………………………………  
Fax (……)………………………………………………………………………  
Email  ……………………………………………………………………………..  
 
   
24 
 SECTION (2) – DESCRIPTION OF THE PRODUCT  
 
Name of manufacturer  …………………………………………………………………………  
Brand name  ………………………………………………………………………  
Model number  ………………………………………………………………………  
Country of origin / Made in XXXXX   ………………………………………………………………………  
Model year  ………………………………………………………………………  
Total  Volume (l)  ………………………………………………………………………  
Product dimension (m x mx m)  Height x Width x Depth  
Power (W)  …………………………………………………………………………  
Voltage (V)  …………………………………………………………………………  
Rated annual energy (kWh)   
Climate  Class (es)  ………………………………………………………………………  
Frost free (Y/N)  ………………………………………………………………………  
Built-in  (Y/N)  ………………………………………………………………………  
Pantry compartment   Volume in L  
Special beverage compartment  Volume in L  
Cellar  Volume in L  
Fresh food compartment  Volume in L  
Chill compartment  Volume in L  
0-star or ice - making  Volume in L  
1-star compartment  Volume in L  
2-star compartment  Volume in L  
3-star compartment  Volume in L  
4-star compartment  Volume in L  
If registered products issuing different commercial names or designation , please specify below the list of all the brand 
names, model numbers, and registration numbers of products in the same family  
Brand name  Model number  Registration number  Tested product?  
   Yes/No  
   Yes/No  
   Yes/No   
25 
 SECTION (3) – TESTING AND TEST REPORT  
Name of laboratory  ……………………………………………………………………………..  
Test date  ……………………………………………………………………………..  
Tested unit brand name  ……………………………………………………………………………..  
Tested unit model number  ……………………………………………………………………………..  
Type of test   Physical testing (at DGSM  approved laboratory)  
Note:  test can be done in the manufacturer’s laboratory only if the laboratory is recognised by a 
DGSM  notified body to operate according to ISO 17025 – see Clause 8)  
Testing method   IEC 62552 :2015  
 Other (specifiy )  
 
Testing results:   
Power (W)  ……………………………………………………………………………..  
Voltage (V)  ……………………………………………………………………………..  
Total  Volume (l)  ……………………………………………………………………………..  
EEI   
Energy Efficiency Class  [A/B/C/D/E/F/G]  
Annual energy 
consumption (kWh/a)    
Auxiliary energy (kWh/a)   
Standard annual energy 
consumption (kWh/a)   
Daily energy consumption 
at 16 °C (kWh/24h)   
Daily energy consumption 
at 32 °C (kWh/24h)   
𝐸𝑑𝑎𝑖𝑙𝑦 =0.5×(𝐸16+𝐸32) 
(kWh/24h)   
 
 
 
 
  
26 
 ANNEX B – Calculation of the energy efficiency index (EEI)  
The refrigerating appliance must be tested as in line with the procedure/methods described in 
relevant parts of IEC 62552:2015.  
Determination of the EEI:  
Energy efficiency index EEI, expressed in % and rounded to the first decimal place, calculated 
as:  
𝐸𝐸𝐼=𝐴𝐸
𝑆𝐴𝐸 
Determination of the AE:  
For all refrigerating appliances the energy consumption AE shall be determined by testing at an 
ambient temperature of 16 °C and 32 °C.  
AE, expressed in kWh/a and rounded to two decimal places, shall be calculated as follows:  
𝐴𝐸=(365 ×𝐸𝑑𝑎𝑖𝑙𝑦
𝐿)+𝐸𝑎𝑢𝑥 
 With:  
-  The load factor L = 0.9 for refrigerating appliances with only frozen compartments and L = 
1.0 for all other appliances; and  
- With 𝐸𝑑𝑎𝑖𝑙𝑦, expressed  in kWh/24h and rounded to three decima l places calculated from ET 
at an ambient temperature of 16 °C (𝐸16) and at an ambient temperature of 32 °C (𝐸32)as 
follows:  
𝐸𝑑𝑎𝑖𝑙𝑦 =0.5×(𝐸16+𝐸32) 
Where 𝐸16 and 𝐸32 are derived by interpolation of the energy test at the target temperatures set 
out in Table 2. 
𝐸𝑎𝑢𝑥, expressed in kWh/a and rounded to three decimal places. 𝐸𝑎𝑢𝑥 is limited to the ambient 
controlled anti -condensation heater and is determined from the heater’s  power consumption  at 
a number of ambient temperature and humidity conditions, multiplied with the probability that 
this ambient temperature and humidity condition occurs and summed; this result is 
subsequently multiplied with a loss factor to account for heat leakage into the compartment and 
its subsequent removal by the refrigeration system.  
Determination of the standard annual energy consumption (SAE):  
For all refrigerating appliances SAE, expressed in kWh/a, and rounded to two decimal 
places, is calculated as follows:   
27 
 𝑆𝐴𝐸=𝐶 × 𝐷 × ∑A𝑐𝑛
𝐶=0× 𝐵𝑐 × [𝑉𝑐𝑉] × (𝑁𝑐+𝑉×𝑟𝑐×𝑀𝑐) 
 where  
- c is the index number for a compartment type ranging from 1 to n, with n the total number of 
compartment  types;  
- 𝑉𝑐, expressed in 𝑑𝑚3 or liters and rounded to the first decimal place is the compartment 
volume;  
- V, expressed in 𝑑𝑚3  or liters and rounded to the nearest integer is the volume with ≤
∑ 𝑉𝑐𝑛
𝑐=1 . 
- 𝑟𝑐, 𝑁𝑐, 𝑀𝑐  and C are modelling parameters specific to each compartment with values in 
Table 6 
-  A𝑐, 𝐵𝑐 and D , are the compensation factors with values as set out in Table 7. 
When carrying out the calculations above, for the variable temperature compartments, the 
compartment type with the lowest target temperature for which it is declared suitable is chosen.  
Table 6The values of the modelling parameters per compartment type  
Compartment 
type 𝒓𝒄 3 𝑵𝒄 𝑴𝒄 C 
Others  0.35 75 0.12 • for combi appliances with 3 -or 4-
star compartments is determined 
as follows:  
- if 𝑉𝑓𝑉⁄≤0.3 then  𝐶=1.3+
(0.87×𝑉𝑓𝑉⁄) 
- — else if 0.3<𝑉𝑓𝑉⁄<0.7 
then 𝐶=1.87−(1.0275 ×
𝑉𝑓𝑉⁄); 
- else C = 1,15.  
• for other combi appliances, C= 
1.15 
• for other refrigerating appliances 
C=1.00 
Where 𝑉𝑓  is the 3 - or 4-star 
compartment volume  Special beverages 
storage  0.60 
Cellar  0.60 
Fresh food  1.00 
Chill 1.10 138 0.12 
0-star & ice -
making  1.20 138 0.15 
1-star 1.50 
2-star 1.80 
3-star 2.10 
Freezer (4 -star) 2.10 
 
 
3 𝑟𝑐=(𝑇𝑎−𝑇𝑐)20⁄; with 𝑇𝑎=24℃ and 𝑇𝑐 as per the values set out in Table 2  
28 
 Table 7The values of the compensation factors per compartment type  
Compartment  
type  Ac Bc D 
 Manual 
defrost Auto-
defrost Freestanding 
appliance  Built -in 
appliance  Number of external doors or 
compartments, whichever is 
lowest.  
≤ 2  3 4 > 4 
Others  
1.00 
1.00 1.02 
1.00 1.02 1.035 1.05 Special 
beverages 
storage  
Cellar  
Fresh  food 
Chill  1.03 
0-star & ice-
making  
1.00 1.10 1.05 1-star 
2-star 
3-star 
Freezer  (4-
star)