KUWAIT STANDAR D KWS  ------- /2022 
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الهيئة العامة للصناعة 
PUBLIC AUTHORITY FOR INDUSTRY (PAI)  
 
KWS -----: 2022 
 
 
 
غسالات الملابس الكهربائية– متطلبات الطاقة والأداء والبطاقات  
Electrical Clothes Washing Machines -  
 
Energy and Water Performance Requirements and Labeling  
 
 
 
 
 
 
 
 
 
 
 
 KUWAIT STANDAR D KWS  ------- /2022 
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FOREWARD  
The Standard  and Metrology Department represents the National Standardization Body  in the State of 
Kuwait, and it is a founding member of the GCC Standardization  Organization,  which is a regional body 
that its membership  includes the nation al standardiz ation bodies of the member states.  
One of the department's tasks is to prepare Kuwaiti standards and technical regulations by specialized 
technical committees.  
The technical sub -committee  for Energy Efficiency of Refrigeration Devices, Washing  Machines and 
Dryers  emanating from the National Committee for th e Electrical and Electro nic Standards  Sector has 
prepared th is Kuwaiti technical regulation  within th e work program of the National Committee for the 
Electrical and Electronic Standards Secto r, in accordance with the ministerial decision  issued in this 
regard.  
This  technical  regulation  "Electrical Clothes Washing Machines - Energy and Water Performance 
Requiremen ts and Labeling " was based on Saudi technical regulation  SASO 288 5. KUWAIT STANDAR D KWS  ------- /2022 
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1. Scope ....................................................................................................................................................5 
 
2. Normative references ...........................................................................................................................5 
 
3. Terms and definitions ...........................................................................................................................6 
 
4. Criteria  for applying the Minimum Efficie ncy Performa nce Standard (MEPS)  ....................................8 
 
4.1 Declaration  of rated values...........................................................................................................8 
 
4.2 Determ ining the Minimum  Energy Perfo rmance Standard  (MEPS) ...........................................8 
 
4.3 Determining the Minimum  Efficiency for Water Consumption Index (WCI) ...............................8 
 
4.4 Acceptance criteria for Water Extraction Index (WEI) ................................................................9 
 
4.5 Acceptance criteria for Labeling and market surveillan ce ..........................................................9 
 
5. Label and classificatio n..........................................................................................................................9 
 
5.1 Determining the Energy efficiency class .....................................................................................9 
 
5.2 Determining the Water Efficiency class .....................................................................................10 
 
5.3 Determining the Water Extraction Efficiency Class ...................................................................10 
 
5.4 Design and placement of the label.............................................................................................11 
 
5.5 Information and values  contain ed on the label ..........................................................................11 
 
6. Marking and instructions ......................................................................................................................14 
 
6.1 General  inform ation ....................................................................................................................14 
 
6.2 Nameplate  information ...............................................................................................................14 
 
6.3 Instruction sheet .........................................................................................................................14 
 
7. Registration requireme nts.....................................................................................................................15 
 
7.1 General  ...........................................................................................................................................15 
 
7.2 Type of docume nts needed  for registration  under the scope of this standard..............................15 
 
Annex  A – Determin ation of washing  efficiency .....................................................................................16 
 
A.1 Prep aration of the test load.......................................................................................................16 
 
A.2 Criteria for washing efficiency index .........................................................................................16 
 
A.3 Calculation  of the washing efficiency index ...............................................................................16 
 
Annex  B – Determin ation of Energy Efficiency Index ............................................................................18 
 
B.1 Calculation  of the Energy Efficiency Index - Gener al ...............................................................18 
 
B.3 Calculation  of the weighted  energy efficien cy ..........................................................................20 
 
B.4 Calculation  of the weighted  power in 'off-mode' .......................................................................20 
 
B.5 Calculation of the weighted  program time ................................................................................20 
 
B.6 Calculation  of the weighted  power in left-on mode  ..................................................................20 
 
B.7 Calculation of the weighted  time in 'left-on' mode ....................................................................20 KUWAIT STANDAR D KWS  ------- /2022 
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Annex  C - Calculation  of the water  consumption ...................................................................................22 
 
C.1 Calculation of the Water Consumption Index (WCI) ................................................................22 
 
C.2 Calculation of the Annual Water Consumption (AWC) ............................................................22 
 
Annex  D - Calculation  of the Water Extraction Index (WEI) ..................................................................23 
 
Annex  E - Washing machine  registration  appli cation/rene wal sample  form (informative) ....................24KUWAIT STANDAR D KWS  ------- /2022 
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1. Scope  
 
 
 
This Standar d spec ifies the performance  and energy  labeling requiremen ts for electric clothes 
washing  machines  with a capacity up to 25 kg, in order that it may carry  a valid energy efficien cy 
label.  
 
Washing machines with additional  function  (dryer)  are included in this standard (this standard covers 
washing function only). 
 
It shall apply to washing machines  to operate in AC single-phase circuits of 240V with a frequ ency of 
50 Hz. 
 
Note:  This standard does not specify  safety  requirements, which are covered  by GSO IEC 60335-2-7 
 
 
2. Normative referenc es 
 
 
 
The followi ng normative referen ce standards apply. However, this Standard supersedes the below 
reference standards  in case of conflicting requirements. For undated referen ces, the latest published 
version applies.  
 
- EN 60456:2016 - Cloth es washing machines for household use - Methods for measuring  the 
performa nce 
 
- GSO 1899  - GCC  Standard  Voltages  and Frequ encies  for Alternating Current  Distribution  
 
- SASO 2885 :2018  - Electrical Clothes  Washing Machines - Energy and Water performance 
requirements an d labelling  KUWAIT STANDAR D KWS  ------- /2022 
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3. Terms and definitions 
For the purposes  of this Standard, the following  terms  and definitions  shall apply. 
 
3.1 Left -on mode:  the lowest power  consumption mode that may persist for an  indefinite  time after 
comple tion of the progr am witho ut any further  intervention  by the  end-user besides  unloading  of the 
washing  machine 
 
3.2 Off-mode: means a condition  where the washing machine is switched off using applian ce controls 
or switches accessible to and intended for operation by the end-user during norm al use to attain the 
lowest  power  consumpti on  that may persist  for an indef inite  time  while  the washing  machine  is 
conne cted to a power  source and used in accordance with the supplier’s instructions; where there is 
no control  or switch accessible  to the  end-user, ‘off-mode’ means  the conditi on reached after the 
washing  machine reverts to a steady- state power consumption on its own 
 
3.3 Partial load:  means  half of the rated  capacity of a washing machine for a given program  
 
3.4 Program: series of pre-defined operations declared  by the supplier as suitable  for washing certain 
types of textile  
 
3.5 Rated capacity (Crated): maxim um mass in kg of dry textiles of a particular type, which the 
manufacturer declares, can be treated in the washing machine on the program  selected 
 
3.6 Rated  frequency  (frated): the number  of cycles per second  through  which an alternating electric 
current passes as claim ed by the manufacturer 
 
3.7 Rated  power (Prated): effective  power input  of the water  as claimed by the manufacturer 
 
3.8 Rated  program  time: time that elapses from the initiation of the program  until the compl etion of 
the program excluding any end-user programed  delay as claimed by the manufacturer 
 
3.9 Rated voltage  (Vrated): the voltage needed  to operate the product,  as claimed  by the manufacturer 
 
3.10 "Shall": where  "shall"  or "shall not" is used for a provision specified, that provision is mandatory 
if compliance  with the standard  is claimed. 
 
3.11 Spin  speed:  rotational speed  of the moving part about its axis expres sed in revolutions per 
minute  
 
3.12 Washing  machi ne: appliance  for cleaning and rinsing  of textiles using water, which may also 
have a means of extracting excess water from the textile 
 
3.12.1 Automatic washing  machine:  means a washing machine where the load is fully treated by 
the machine  without the need for user intervention at any point during  the progr am 
 
3.12.2 Comb ined washer-drier: means  a washing machine which includes both a spin extraction 
function and also a means for drying the textiles,  usually by heating  and tumbling 
 
3.12.3 Drum type machine: a clothes washing machine  in which the textile material  is contai ned in a 
horizontal  or inclined  drum and in which  the mechanical action is produced by a ro tation of the drum 
about its axis, the movement being either continuous or periodically reversed KUWAIT STANDAR D KWS  ------- /2022 
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Note: All types of machine  not conforming to this definiti on are classified  as ‘other than drum  type’ 
 
3.12.4 Front load washing machine: a drum  type washing machine where  the loading  of cloth es is 
located on the front 
Note: front load is usually consi dered as horizontal axis washing machine (see IEC 60456) 
 
3.12.5  Top load washing machin e: a washing  machine where the clothes are loaded through  the top 
of the machine, which is usually but not always covered  with a hinged door 
Note: top load can be horizontal or vertical  axis washing machine  (see IEC 60456) 
 
3.12.6 Twin-tub washing machine: washing machine  equipped  with two tubs; one tub is used for 
washing  the clothes  in and second one is for spinning  the clothes  dry. Clothes  are manually moved 
from the washing  tub to the spinning tub once the washing cycle has been compl eted 
Note: twin tub washing  machine is also named manual washing machine  and usually consider ed as vertical axis washing 
machine  (see IEC 60456)  
 
3.12.6 Vertical axis washing  machine: washing machi ne in which the load is placed in a drum which 
rotates around an axis which  is vertical  or clo se to vertical. For the purposes of this  document, vertical 
axis is where the angle of the axis of rotation is more than 45 degrees  to horizontal. Where the drum 
does not rotate, the washing machine shall be classified as a vertical axis washing machine.  
 
NOTE: The classificati on of vertic al axis or horizont al axis in EN IEC 60456 is only used to define the placement  of the load 
into the drum . 
 
3.12.7 Horizontal  axis washing machine: washing machine in which  the load is placed in a drum 
which rotates around an axis which is horizontal or close to horizontal. For the purposes of this 
document,  horizo ntal axis is where the angle  of the axis is less than or equal to 45 degrees to 
horizonta l. 
 
NOTE The classificati on of vertical axis or horizontal axis in EN IEC 60456 is only used to define the placement  of the load 
into the drum . 
 
3.12.8 Motor operated  washing  machine: appliance  operating with motor only, without  any internal 
heater 
 
3.13  Wash  cycle:  complete  washing,  rinsing  and spinning  process,  as  defined  for  the  selected 
program  
 
3.14 Washing Efficiency Index (Iw): an indicator representative of the cleanliness of the washed 
item 
 
3.15 Water Extrac tion Index  (WEI):  means the amou nt of moisture  contained in the load at the end 
of the spinning  phase 
 
 
4. Criteria  for applying the Minim um Efficiency Performance Standard  (MEPS) 
4.1 Declaration of rated values 
The declaration  of the rated capacity shall be expres sed only in terms of weight (kg) as multiples  of 
0.5 kg. 
 
If the heating is included  in the washing machine, the declarati on of the rated power  shall be 
expressed only in terms  of watt (W) as multiples of 50 W 
 
The declaration  of the Energy Efficiency  Index as an integer  value (no unit) KUWAIT STANDAR D KWS  ------- /2022 
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 The declaration  of the annual energy consumption  as a multiple of 1 kWh. 
The declaration of the annual water consumption  as a multiple of 1 liter. 
4.2 Determining the Minimum Energy Performance  Standard  (MEPS) 
The minimum energy performan ce standard (MEPS)  requirem ent for washing machines  is based  on 
the limitation of the rated Energy Efficiency Index (EEI - see Annex B) according  to table 1. 
 
Table 1 – MAX IMUM  ANNUAL ENERGY CONSUMPTION  
Limit value for the rated Energy  
Efficiency Index  Type of washing machines(EEI ) 
EEI < 68 hinescma shingaw load ntoFr 
EEI < 68 Top load washing machines 
EEI < 68 Twin tub washing machines 
 
 
 
4.3 Determin ing the Minimum Efficiency  for Water  Consumption Index (WCI) 
The water efficiency rating of washing machines is determined using the following formula for the rated 
water consumption index (WCI) determined under Annex C for 1 cycle at full load (Cotton cycle at 
60°C). 
 
Table 2 – MINIMUM WATER CONSUMPTION INDEX 
 
Type of machines Limit value for the water consumption index 
(WCI ) 
 
Rated Capacity  
Crated  < 5kg  
Crated   ≥  5kg 
 
Horizontal axis washing machines  
≥ 2.5  
≥ 3.0 
 
Vertic al axis washing machin es  
≥ 2.0  
≥ 2.0 KUWAIT STANDAR D KWS  ------- /2022 
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4.4 Acceptance  criteria  for Water Extraction Index  (WEI) 
When tested at rated capacit y, the weighted  Water Extraction Index  of the washing  machine shall 
achieve  an average water  extraction  index  not exceeding 82% (see Annex D). 
 
4.5 Acceptance  criteria  for Labelling and market surv eillance  
The energy label shall be accepted as valid when a single  sample  of an applian ce or unit mode l, 
tested  for an initial screening test, meets the following  criteria as appli cable:  
 
a)  Measured power ……….…………………..…………..……… ………….....≥ 0.90 x rated value 
b)  Measured power (general).……………..……… ………… ……. ……....... ≤ 1.05 x rated power 
c)  Measured power (motor operated).……… ……..……… …….……… ….. ≤ 1.15 x rated power 
d)  Measured annual energ y....…………..…… ….……… ….…….. …≤1.10  x rated annual energy 
e)  Measured program time …………………… ……….… ….………..≤ 1.10 x rated program time 
f)   Measured water consumpti on………………… ………… …..≤ 1.05 x rated water consumption 
g)   Measured water extraction index (moisture  content)…..……………..…..≤ 1.10 x rated value 
h)  Measured Maximal Spin Speed (if available)………… …..…………… …...≥ 0.90 x rated value 
i)      Measured duration of the left-on mode……… ………… …………… ……..≤ 1.10 x rated value 
j)      Measured power consumption in left-on mode 
k)   Measured power consumption in off-mode 
 
The measured  value  of power  consum ption in off-mode  (Po) and left-on mode (Pl): 
 
         More  than 1.00 W ≤ 110 % x rated power 
         Less than or equal  to 1.00 W ≤ (0.10 W + rated power) 
 
If the rated/measured  spinning capacity is different from the rated washing capacity, this value shall 
not be lower  than 55% of the rated (washing)  capacity. 
 
 
5. Labe l and classification 
5.1 Determining the Energy efficiency class 
The energy efficiency class for each  produ ct is based on the rated  Energy Efficiency Index  (EEI) and 
shall be determi ned as outlined  in Table 3, see Annex B. 
 
 
Table  3: ENERGY  EFFICIENCY CLASS ES 
 
Bar color Equivalent  Energy 
efficiency class 
(Arabic) Equivalent  Ener gy 
efficiency class 
(English)   
EEI 
 
Dark green   
أ  
A  
EEI < 34 
 
Green   
ب  
B  
34 ≤ EEI < 41 
 
Light  green  
ج  
C  
41 ≤ EEI < 46 
 
Yellow   
د  
D  
46 ≤ EEI < 52 KUWAIT STANDAR D KWS  ------- /2022 
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Orange  
ھ  
E  
52 ≤ EEI <68 
 
Red  
و  
F  
68 ≤ EEI < 85 
 
Dark red  
ز  
G  
85 ≤ EEI < 101 
5.2 Determining the Water Efficiency class 
The water efficien cy class for each product is based on the rated  Water Consumption  Index (WCI) 
and shall be determined  as outlined  in Table  4, see Annex C. 
 
 
Table  4: WATER  CON SUMPTION INDEX CLASSES 
 
Ener gy efficien cy class 
(Arabic)  
Ener gy efficien cy class 
(Englis h)  
WCI 
 
أ  
A  
6.0 ≤ WCI 
 
ب  
B  
5.5 ≤ WCI < 6.0 
 
ج  
C  
5.0 ≤ WCI < 5.5 
 
د  
D  
4.5 ≤ WCI < 5.0 
 
ـھ  
E  
3.5 ≤ WCI < 4.5 
 
و  
F  
3.0 ≤ WCI < 3.5 
 
ز  
G  
2.0 ≤ WCI < 3.0 
 
 
5.3 Determining the Water Extraction Efficiency Class 
The Water Extra ction efficien cy class for each product is based on the rated  Water Extraction Index 
(WEI) and shall be determined as outlined  in Table 5, see Annex D. 
 
 
Table 5: WATE R EXTRACT ION EFFICIENCY CLASSES 
Energy  efficiency class 
(Arabic) Ener gy efficien cy class 
(English)   
WEI 
 
أ  
A  
WEI < 45 
 
ب  
B  
45 ≤ WEI < 54 
 
ج  
C  
54 ≤ WEI < 63 
 
د  
D  
63 ≤ WEI < 72 
 
ـھ  
E  
72 ≤ WEI < 81 KUWAIT STANDAR D KWS  ------- /2022 
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و  
F  
81 ≤ WEI < 90 
 
ز  
G  
90 ≤ WEI 
 
 
5.4 Design  and placement  of the label  
The label  shall be printed as illustrated in Figure 1. It shall be fixed and non-removable  on the 
packaging and another label shall be availa ble inside the packaging  to be posted on the produ ct. It is 
the responsibility  of the retailer to place the label  on the most promi nent part of the product to be 
easily visible to the consumer at the point  of sale. 
 
The Ener gy efficie ncy classes shall each be represented with a visible letter and color-coded bars as 
outlined  in Table 3 and illustrated  in Figure  1. 
 
The Water Consum ption efficiency  classes shall each  be represented  with a visible letter, as outlined 
in Table  4 and illustrated in Figure 1. 
 
The Water Extra ction efficien cy classes shall each be repre sented with a visible letter,  as outlined in 
Table  5 and illustrated  in Figure  1. 
 
The label  must  be 100 mm wide and 170 mm high. 
 
5.5 Inform ation and values cont ained on the label 
The fields (a) to (h) outlined  in Figure  2 shall comply with the following requirement s: 
 
         Field (a): This field shall display the logo of the Public Authority for Industry . 
         Field (b): this field shall reflect the energy efficiency class, which the product attaine d. 
         Field (c): this field s this field shall reflect the annual energy use in kWh. 
         Field (d): this field shall reflect the capacity of the product expressed in kg. 
         Field (e): this field shall reflect  the annual water consumption  and water  efficiency class. 
         Field (f): this field shall reflect  the water extraction efficiency class. 
 Field (g): This field shall have  a QR code repres enting the main  charact eristics of the 
washing machine, this may include  the following items based  on the data provided in the 
registration form:  
o Manufacturer name 
o Model  number 
o Brand  name 
o Coun try of origin 
o Rated powe r (W) 
o Rated voltage (V) 
o Rated capacity (kg) 
o Ener gy Classification  (unit-less) 
o Water  Efficiency classification (unit-less) 
o Rated Annual Ener gy Consumption  - AEC (kWh) 
o Rated Annual Water Consumption – WEC  (liters and class) 
o Rated Water Extraction Index - WEI (%) 
         Field (h): this field shall reflect the identification of the produ ct. 
         Field (i): this field shall reflect the registration number and standard reference numb er. 
         Field (j): this field shall reflect the legal statement attached to energy efficiency labels. KUWAIT STANDAR D KWS  ------- /2022 
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Figure 1 – Label for washing machines 
 
 
 
 
 
 
 
 KUWAIT STANDAR D KWS  ------- /2022 
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Figure 2 – Position for display of information 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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6. Marking and instru ctions 
 
 
 
6.1 General informati on 
The following informati on shall be marked  on the nameplate  of the washing  machine  in (Englis h) or 
(Arabic and English).  The marking shall not be on a detac hable part of the unit and shall be indelible, 
durable  and easily legible.  
 
Any information related to energy performa nce added on any part of the washing machine  unit or 
packaging shall not have any ambiguity or lead to misunderstanding  of the performance  of the unit. 
 
6.2 Nameplate information 
The name plate inform ation shall include, for conformity to this standard  the following inform ation: 
 
         Manufactur er’s name  and/or trademark. 
         Country  of origin. 
         Manufactur er’s model  or type reference and serial number  of the unit. 
         Rated  voltage or rated voltage range in volts (V). 
         Rated  frequency in hertz (Hz). 
         Rated  power input in Watt (W) or kiloW atts (kW) 
         Rated  Capacity (kg) 
         Annual Energy Consum ption (kWh/ye ar or kWh) 
         Annual Water Consumption (liters/year or liters) 
 
6.3 Instruction  sheet 
An instruction sheet and manual in both Arabic  and English shall be delivered with each washing 
machines.  Tables, drawings  and circuit diagrams  may be depicted in English only. 
 
The instruction sheet or manu al shall include the following information as a minimum:  
 
         The information specified  in clause 6.2 except 'Country of origin' and 'serial number'  
         Dimensio ns of the unit 
         Instruction  for mounting and connection  to the pipes 
         Instruction  for connection to the electrical installation 
 Instructions  necessary for the corre ct operation of the unit and any special preca utions to be 
observed to ensure its safe use and mainten ance 
         Instruction  for packing and unpacking the unit 
         Instructions  on unit handling and rigging 
         Net weight of the unit KUWAIT STANDAR D KWS  ------- /2022 
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7. Registra tion requirements 
 
 
 
7.1 General    
Product  registration  is  mandatory,  whereby  information  about  registration  requirements  will  be 
available  in  the  information  center  of  the  Public Authority for Industry (PAI) ,  Metrology,  and  
Standards   Department , and reference shall be made to the separate PAI registration forms and 
requirements.   
The product's information shall be submitted through PAI registration . 
The applicant sha ll fulfill all updated requirements of  the electronic registration system and any new 
requirements, procedures, and regulations required by PAI. A draft of the registration form is provided in 
Annex E (the final version is the one present on the PAI websit e). 
 
 
 
 
 
 
7.2 Type of documents  neede d for regi stration  unde r the scope  of this standard  
For registratio n, a test report  covering  the product submit ted shall be attach ed. Test report shall 
comply with PAI requirements . 
 
Note: this test report  is not exclusive  from other  documen ts required by PAI (e.g. Electro  Magnetic  
Compatibility, safety,…) for regis tration. KUWAIT STANDAR D KWS  ------- /2022 
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Annex  A – Determination  of washing  efficiency 
A.1 Prepar ation of the test load 
Test loads  are prepared as given in EN 60456 Annex ZA.2 
 
For washing  machines  with a rated capacity up to 15 kg, conditions for the prepar ation of the loads 
expressed in EN 60456  Table ZA.1 apply 
 
For washing  machines  with a rated capacity from 15 kg up to 25 kg the following rules  apply  as a 
supplement  to Table  ZA.1 in EN 60456 
 
 For  test  load  masses  to  the  whole  or  half  kilogram  rating  which  are  greater  than  those 
specified in the table  ZA.1, the number of stain test strips is equal to the nominal test load 
mass (rounded  to the nearest  kilogram),  the number  of sheets is the nominal  test load mass 
divided  by (3 × 0,725)  (rounded  to the nearest  whole  sheet) and the number  of pillowcas es is 
the nominal  test load mass divided  by (3 × 0,24) (roun ded to the nearest whole  pillow  case). 
The balan ce of the required nomin al test load mass is made up of towels as required. The 
mass of all base load items  can be expected  to decline slightly with increasing age. 
         Difference  between base load mass and test load mass  is due to the mass of the test strips as 
 The actual  number  of towels may differ  from the number  indicated above (which is intended  to 
be indicativ e) 
 
A.2 Criteria  for washing efficiency index  
For washing  machines  the Washing Efficien cy Index (Iw) shall be greater than 0.88 (Formula  A.1) for 
each testing conditions  at full load, 60°C  and half load 60°C  and 40°C. 
 
Tests are conducted  with a water hardness  of 2.5 (± 0.2) mmol/l  of CaCO3 equiv alent. 
 
A.3 Calculation of the washing efficiency  index 
For  the  calculation  of  the  Washing  Efficiency  Index  (Iw),  the  weighted  washing  efficien cy  of the 
washing  machine  for the standard 60°C  cotton program at full and partial  load and for the standard 
40°C  cotton program at partial  load is compared to the washing efficiency of a reference washing 
machine,  where  the  r eference  washing  machine  shall  have  the  c haracteristics  indicated  in  the 
generally  recognized  state-of-the-art measurement  methods, including  methods  set out in EN 60456. 
 
The Washing Efficien cy Index  (Iw) is calculated  as follows and round ed to three decimal places 
 
Iw = (3 × Iw;60 + 2 × Iw;60;½ + 2 × Iw;40;½  )/7                                                                          Formula  (A.1) 
Where: 
Iw;60     : washing efficiency  index of the standard 60°C cotton program at full load; 
Iw;60;½  : washing  efficien cy index  of the standard 60°C cotton  program  at partial  load; 
Iw;40;½  : washing  efficien cy index  of the standard 40°C cotton  program  at partial  load. 
 
The Washing Efficiency  Index of one standard  cotton progr am (IW,p) is calculated  as follow s: 
 
 
                                                           
Formula  (A.2) 
 
 
 
Where: KUWAIT STANDAR D KWS  ------- /2022 
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WT,i = Washing Efficien cy of the washing  machine under  test for one test cycle (i); 
WR,a = Average Washing Efficiency of the reference washing machi ne; 
n = number  of test cycles, n ≥ 3 for the stand ard 60°C  cotton  program  at full load, n ≥ 2 for the 
standard 60 °C cotton program  at partial load and n ≥ 2 for the standard 40°C  cotton progr am at 
partial load. 
 
The Washing Efficien cy (WT,i) is the average  of the reflectance values of each test strip after 
comple tion of a test cycle. 
 
 
 
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Annex  B – Determination  of Ener gy Efficiency Index  
 
 
 
B.1 Calculation  of the Energy  Efficiency Index - General 
For the calculation of the Ener gy Efficien cy Index (EEI) of a washing machine  model, the weighted 
annual energy consumption  of a washing machine for the standard 60°C  cotton program  at full and 
partial load and for the standard  40°C cotton  program at partial load is compared to its standard 
annual energy consumptio n. 
 
The Ener gy Efficiency Index (EEI)  is calculated  as follows  and rounded to one decimal  place: 
                                                                                                                                   
Formula  (B.1) 
 
Where  
AEC = annual energy consumption  of the washing machine  (kWh);  
AECref = standard annual energy consumption  used as reference value (kWh). 
 
The standard annual energy consumption (AECref) is calculated  in kWh as follows  and rounded to two 
decimal places: 
AEC ref = 47.0 × Crated  + 51.7                                                                         Formula  (B.2) 
Where: 
Crated  = rated capacity of the washing machine  for the standard 60°C  cotton program at full load or the 
standard 40°C cotton program at full load,  whichever is the lower.  
 
The weighted annual  energy consumption (AEC) is calculated in kWh as follow s and is rounded to 
two decimal places: 
 
Formula (B.3)  
 
Where: 
Et = weighted energy consumption  (in kWh); 
Po = weighted  power in ‘off-mode  (in W)’; 
Pl = weight ed power in the ‘left-on mode’ ( in W); 
Tt = weight ed program time (in minutes – min); 
220 = total number of standard washing cycles per year. 
constant  (time)  
 
 
 
Where the washing machine is equipped with a power management  system, with the washing 
machine reverting  automatically to ‘off-mode’  after the end of the program,  the weighted annual 
energy consumption (AEC) is calculated taking  into considera tion the effective duration of ‘left-on 
mode’,  according  to the following  formula  B.6 
 
ܲ 
 
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Formula (B.4)  
 
 
Where: 
Tl = time in ‘left-on mode  (in minutes–min)’ 
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B.3 Calculation of the weig hted energy  efficiency  
The weighted energy consumption  (Et) is calculated in kWh as follows and round ed to three decimal 
places: 
 
Et = (3 × Et;60 + 2 × Et;60;½  + 2 × Et;40;½  )/7                                                                         Formula  (B.5) 
Where: 
Et;60     : energy consumption  of the standard  60°C  cotton program at full load; 
Et;60;½  : energy consumption  of the standard 60°C cotton  program  at partial load; 
Et;40;½  : energy consumption  of the standard 40°C  cotton  program  at partial load.  
 
 
B.4 Calculation of the weig hted power  in 'off-mod e' 
The weighted power  in ‘off-mode’ (Po) is calculated in Watt as follows and rounded  to two decimal 
places: 
 
Po = (3 × Po;60 + 2 × Po;60;½ + 2 × Po;40;½  )/7                                                                      Formula  (B.6) 
Where: 
Po;60    : power in ‘off-mode’ of the standard 60°C  cotton program  at full load; 
Po;60;½  : power in ‘off-mode’ of the standard 60°C cotton program  at partial  load; 
Po;40;½  : power in ‘off-mode’ of the standard 40°C cotton program  at partial  load. 
 
 
B.5 Calculation of the weig hted program time 
The weighted program time (Tt) is calculated in minutes  as follows  and rounded to the nearest  minute: 
 
Tt = (3 × Tt;60 + 2 × Tt;60;½  + 2 × Tt;40;½  )/7                                                                         Formula  (B.7) 
Where: 
Tt,60     : program time of the standard  60°C cotton  program at full load; 
Tt;60;½  : program time of the standard  60°C cotton  program  at partial load; 
Tt;40;½  : program time of the standard  40°C cotton program  at partial  load. 
 
 
B.6 Calculation  of the weig hted power  in left-on mode 
The weighted power  in the ‘left-on mode’  (Pl) is calculated  in Watt as follows and rounded to two 
decimal places: 
Pl = (3 × Pl;60 + 2 × Pl;60;½ + 2 × Pl;40;½ )/7                                                                         Formula  (B.8) 
Where: 
Pl;60     : power  in ‘left-on mode’ of the standard  60°C cotton  program  at full load;  
Pl;60;½  : power in ‘left-on mode’ of the standard 60°C cotton program at partial load; 
Pl;40;½  : power in ‘left-on mode’ of the standard 40°C cotton program at partial load. 
 
 
B.7 Calculation of the weig hted time in 'left-on' mode  
The weighted time in ‘left-on mode’ (Tl) is calculated  in minutes as follows and rounded to the nearest 
minut e: 
 
Tl = (3 × Tl;60 + 2 × Tl;60;½  + 2 × Tl;40;½  )/7                                                                         Formula (B.9) 
Where: KUWAIT STANDAR D KWS  ------- /2022 
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Tl;60     : time in ‘left-on mode’ of the standard  60°C cotton  program at full load; 
Tl;60;½  : time in ‘left-on mode’ of the standard 60°C  cotton program at partial  load; 
Tl;40;½  : time in ‘left-on mode’ of the standard 40°C  cotton program at partial  load. KUWAIT STANDAR D KWS  ------- /2022 
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Annex  C - Calculation  of the water cons umption  
 
 
 
C.1 Calculation of the Water Consum ption Index (WCI)  
The water consumption index of a washing  machine is calculated  as follows based on the energy 
consumption of 1 standard cycle at 600C cotton at full load and rounded  up to with 2 decimals. 
 
 
 
  
Formula  (C.1) 
 
 
Where: 
WCI   : value used to determine the classification of the appliance  related to water  consumption; 
Wt;60    : water consumption of the standard 60°C  cotton program  at full load; 
30      : base water  consumption per kg of capacity; 
Crated   : rated capacity of clothes washer in (kg); 
F        : water reduction factor (30%) = 0.30.  
 
 
C.2 Calculation  of the Annu al Water  Consumption  (AWC) 
The weighted annual  water consumption (AWC) of a washing machine is on the water consumption 
for the standard 60°C cotton program  at full and partial load and for the standard  40°C  cotton program 
at partial  load as follows and rounded up to the intege r. 
AWC  = 220 x Wt                                                                                                                                                                                 Formula  (C.2) 
Where: 
Wt     : weighted  water  consumption (liter) 
220 : number of cycles per year 
 
 
The weighted water consumption  is calculated as follows and rounded  up to the integer. 
 
Wt = (3 × Wt;60 + 2 × Wt;60;½  + 2 × Wt;40;½ )/7                                                                   Formula  (C.3) 
Where: 
Wt;60     : water consumption of the standard 60°C cotton program at full load; 
Wt;60;½  : water consumption of the standard  60°C cotton  program at partial load; 
Wt;40;½  : water consumption of the standard  40°C cotton  program at partial load.  
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Anne x D - Calculation of the Wate r Extraction Index (WEI) 
 
 
The weighted remaining  moisture  content which is referred  to as the Water Extraction Index (WEI) of 
a washing machine is calculated in perce ntage as follows and rounded  to the nearest whole percent: 
 
Formula  (D.1) 
 
 
 
 
Where: 
 
WEI60: is the water  extraction  index  for the standard 60°C  cotton program at full load, in percentage 
and rounded to the nearest whole  perce nt; 
WEI 60;½:: is the water extraction index for the standard 60°C  cotton program at partial  load, in 
percentage  and rounded to the nearest whole per cent; 
WEI 40;½: is the water extraction index for the standard 40°C  cotton progr am at partial  load, in 
percentage  and rounded to the nearest whole per cent. 
 
The Water extraction  index  for each stand ard cotton program is calculated according  to EN 60456 
Annex  ZA 5.4 (noted D in EN 6045 6) 
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Annex  E - Washing  mach ine registration  application/renewal samp le form  (informative) 
 
 
I hereby apply  for the registration of a washing machine(s)  for the purpose of energy efficiency. 
 
In the country of ……… ………… …………… …………… ………………………… ………………  
(specify  the country in which this application is made) 
 
 
SECTION  (1) – APPLICANT DETAI LS 
 
 
 
Name  of applicant                       ……… …………… …………… …………… …………… …………… ….. 
Business address                       ……… …………… …………… …………… …………… …………… ….. 
P.O Box                                      ……… …………… …………… …………… …………… …………… ….. 
Post co de                                    ……… …………… …………… …………… …………… …………… ….. 
Cont act person                           ……… …………… …………… …………… …………… …………… ….. 
Position/title                                 ……… …………… …………… …………… …………… …………… ….. 
Tel                                               (……) …………… …………… …………… …………… ………………… 
Fax                                              (……) …………… …………… …………… …………… ………………… 
Email                                           ……… …………… …………… …………… …………… …………… ….. KUWAIT STANDAR D KWS  ------- /2022 
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 Brand name Model number  Registration  number Tested  product? 
   Yes/No 
   Yes/No 
   Yes/No 
Note: for each cycle at full and half load the rated values are related  to Washi ng Efficien cy, Ener gy consumption, Water 
cons umption, water extracti on index, Duration  of the cycle, Power  and duration  for the left-on mode,  power in Off- 
mode 
  
 
SECTION  (2) – DESCRIPTION OF THE PROD UCT 
 
 
 
Name  of manufact urer                                               ……… …………… …………… …………… ……………… …… 
……….. 
Brand name                                                               ……… …………… …………… …………… ……………… …… 
Model number                                                            ……… …………… …………… …………… ……………… …… 
Country of manuf acture  / Made in XXXXX               ……… …………… …………… …………… ……………… …… 
Model year                                                                 ……… …………… …………… …………… ……………… …… 
Type                                                                               Front load 
                 Top load  
                                                                                                  Twin tube   
   
Position of the axis                                                        Horiz ontal 
 Vertical  
 
Com bined washing and drying                                        Yes 
                                                                                      No 
 
Energy management control                                           Yes 
                                                                                      No 
 
Rated capacity (kg)                                                   ……… …………… …………… …………… ……………… …… 
Rated P ower (W)                                                       ……… …………… …………… …………… ……………… …… 
Rated  Voltage  or Volta ge range (V)                         ……… …………… …………… …………… ……………… …… 
Rated power input (W)                                              ……… …………… …………… …………… ……………… …… 
Rated  Maximal  Spin speed (tr/min) 
Rated values (full load – 60oC) – see Note  
 
Rated values (half load – 60oC) – see Note 
 
Rated values (half load – 40oC) – see Note 
 
Rated Energy Efficiency Index - EEI (-) and 
related Energy Class   
autocalculated  based on the rated  values 
Rated  Annual Water  Consumption - AWC  (liter)     autocalculated  based on the rated  values 
 
Rated  Water  Consumption Index – WCI based 
on performa nce at full load, 60C - Wt;60  (liter) 
and related Water Cons umption  Class  
Rated  Water  Extraction  Index  – WEI (%) and 
related Water extraction  Efficiency  Class  
autocalculated  based on the rated  values 
 
 
autocalculated  based on the rated  values 
Dimensions of unit (mm x mm x mm)                       ……… …………… …………… …………… ……………… …… 
Net weight of the unit (kg)                                         ……… …………… …………… …………… ……………… …… 
If registered  products issuing differ ent comm ercial names or designation  , please specify below  the list of all the brand 
name s, model numbers,  and registrati on numbers of products in the same  family  KUWAIT STANDAR D KWS  ------- /2022 
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SECTION  (3) – TESTI NG AND TEST REPORT  
 
 
 
Name  of laboratory                     ……… …………… …………… …………… …………… …………… ….. 
Test date                                     ……… …………… …………… …………… …………… …………… ….. 
Tested  unit br and name             ……… …………… …………… …………… …………… …………… ….. 
Tested  unit model  number         ……… …………… …………… …………… …………… …………… ….. 
Type of test                                                Physical testing (at PAI approved labor atory) 
Note:  test can be done  in the manufacture r’s laboratory only if the laborato ry is recognised 
by a PAI notified  body to operate according to ISO 17025  – see Clause 8) 
Testing  meth od                                   EN 60456 
 
Test report                                 The test report shall  include all results  used  to calculate AEC, AWC, WEI and 
related classific ation for energy, water and spinning efficiency; this means the 
values  for each cycle at 60oC full load, 60oC half load and 40oC half load used in 
the formulas prese nted in Annex A to D. 
Testing results:                         Testing  results including  all interme diate values for energy, operating  times will be 
required in the registration system 
Tested  Capacity (kg) 
 
Tested Power (W)                      ……… …………… …………… …………… …………… …………… ….. 
Tested  Voltage  (V)                     ……… …………… …………… …………… …………… …………… ….. 
Spin speed (tr/min)                     ……… …………… ……………                   Tested 
                  Declared  
Tested  values (full load – 
60oC) – see Note 
Tested  values (half load – 
60oC) – see Note 
Tested  values (half load – 
40oC) – see Note ……… …………… …………… …………… …………… …………… ….. 
 
……… …………… …………… …………… …………… …………… ….. 
 
……… …………… …………… …………… …………… …………… ….. 
Note:  for each cycle at full and half  load the tested  values are related to Wa shing Efficiency, Energy consumption, 
Water cons umption, Water extraction  index, Duration of the cycle, Power  and duration for the left-on mode, 
power in Off-mod 
 
 
SECTION  (4) – ATTACHMENTS  
List of the following shall be attach ed to the registr ation: 
 
          Test report 
          Image of the appliance  
          Brand logo