UNITED ARAB EMIRATES  STANDARD  
 
 
UAE.S 5010 -4:2021 
 
 
Labeling – Energy Efficiency Label for Electrical Appliances  
Part 4: Electric Storage Water Heaters  
 
 
 
دولة الإمارات العربية المتحدة  
UNITED ARAB EMIRATES  
 
 
 
 
 
 
ICS: 75.020  
 
 
 
 
 
 
 
 
 
 
 
 
ELECTRIC WATER HEATERS – FULL CERTIFICATION SCHEME  
 
ISSUING DATE   
Technical Regulation   
 
   
Contents  
 
Introduction  ................................ ................................ ................  Error! Bookmark not defined.  
1. Scope  ................................ ................................ ................................ ................................  3 
2. Applicable Standards  ................................ ................................ ................................ ..... 3 
3. Terms and Definitions  ................................ ................................ ................................ .... 3 
4. Product Requirements  ................................ ................................ ................................ ... 4 
5. Appliance Classification  ................................ ................................ ................................ . 4 
6. Energy Efficiency Index Calculation  ................................ ................................ ............  5 
7. Annual Energy Consumption Calculation  ................................ ................................ ... 7 
8. Manufacturer Requirements  ................................ ................................ ..........................  7 
9. Product Certification  ................................ ................................ ................................ .......  7 
10. Violations and Penalties  ................................ ..............  Error! Bookmark not defined.  
11. Liability and Disclaimer  ................................ ................  Error! Bookmark not defined.  
 
   
Labeling – Energy Efficiency Label for Electrical Appliances  
Part 4: Electric Storage Water Heaters  
 
1. Scope  
 
This regulation establishes requirements for electric storage water 
heaters for household and similar purposes and intended for heating 
water below boiling temperature, their rated capacity being not more 
than 500 liters.  
2. Applicable Standards  
 
The following sta ndard  shall apply:  
 
2.1. UAE.S IEC 60379 :2013 1987 – Methods for measuring the 
performance of electric storage water heaters for household appliances  
2.2.  UAE.S IEC 60335 -1: 2020  :  
2.3.  UAE.S IEC 60335 -2-21: 2018  :  
3. Terms and Definitions  
 
For the purpose of this regulation, the following terms shall apply:  
 
3.1. MOIAT  – Ministry of Industry and Advance Technology , the national 
authority mandated to implement this regulation . 
3.2. (ECAS) Emirates Conformity Assessment Scheme for Low Voltage 
Equipment (LVE)  
3.3. • Rated water capacity: the water capacity (in liters) specified for the water 
heater and indicated on it by the manufacturer.  
3.4. • Rated input: The electrical power (in watts or in kilowatts) specified for 
the water heater and indicated on it by the manufacturer.  
3.5. • Stable  loss per 24 hours: The energy consumed for a water -filled heater 
after it reaches stable conditions when it is connected to the electricity 
source during any 24 -hour period without drawing water from the heater.  
3.6. • Rated voltage: the voltage in volts (in t he case of a three -phase source, 
the voltage between two phases) specified for the water heater and 
indicated on it by the manufacturer.   
4. Product Requirements  
 
Products covered by this regulation shall comply with the requirements 
stipulated under this section.  
 
4.1. National Deviations  
 
The following deviations shall be met by products covered by this 
regulation:  
 
4.1.1.  Voltage Rating: 2 20V-240V  
4.1.2.  Frequency Rating: 50Hz  
4.1.3.  Arabic Instruction Manual  shall be provided along with the product.  
 
4.2. Electrical Safety  
 
This section gives reference to the requirements set by the Emirates 
Conformity Assessment Scheme (ECAS) for Low Voltage Equipment 
(LVE). Products covered by this Technical Regulation shall comply with 
the requirements set by the applicable standards refer ence in the 
ECAS for Low Voltage Equipment (LVE).  
 
4.3. Energy Efficiency Label  
 
The product shall be supplied with the energy efficiency label  as per 
the prescribed design in this regulation . Products that are displayed in 
the market shall be affixed with the energy efficiency label.  
 
The energy efficiency label shall be affixed on the packaging of  the 
product without exemptions, as prescribed in Annex  (A) of this 
regulation.   
 
The e nergy efficiency label for products not inten ded for display may 
be provided  or supplied  along with the instruction manual.  
 
All energy efficiency labels shall be printed with the energy efficiency 
serial number which is assigned  
5. Appliance Classification  
 
All electric storage water heaters covered by this regulation shall be 
classified into four (4) categories as per below descriptions:  
  
 
Table 1: Appliance Classification  
 
Class  Description  
1 Unvented electric storage water heaters having a  
rated capacity not exceeding 30  liters  
2 Open -outlet electric storage water heaters having 
a rated capacity not exceeding 30  liters  
3 Horizontal tank type electric storage water heaters 
having a rated capacity 30  liters up to 500 liters  
4 Vertical tank type electric storage water heaters 
having a rated capacity 30 liters up to 500 liter s 
 
6. Energy Efficiency Index Calculation  
 
The following formula and factors shall apply in calculating the energy 
efficiency index of the product.  
 
6.1. Energy Consumed ( Econs) 
 
𝐸𝑐𝑜𝑛𝑠 = 𝐸1
𝑡1 𝑋 24 
Where:  𝐸1 – Energy consumed over 𝑡1 duration > 48 hours  
 𝑡1 – Elapsed time where steady state condition is reached and measurement of 𝐸1 is 
done  
 
6.2. Mean Water Temperature ( θM) 
 
𝜃𝑀= 𝜃𝐴+ 𝜃𝐸
2 
Where:  𝜃𝐴 – Mean water temperature after a thermostat cut -out 
 𝜃𝐸 – Mean water temperature after thermostat cut -in 
 
6.3. Standby Loss ( Qpr) 
 
𝑄𝑝𝑟= 45
𝜃𝑀− 𝜃𝑎𝑚𝑏 𝑋 𝐸𝑐𝑜𝑛𝑠 
  
Table 2: Average Energy Consumption for Standby and Fixed Loss  
 
Appliance Category  Average Energy 
Consumption (Standby Loss)  
(kWh/24h)  Average Energy 
Consumption (Fixed Loss)  
(kWh/24h)  
𝐸𝑎𝑣 𝑠𝑡𝑎𝑛𝑑𝑏𝑦  𝐸𝑎𝑣 𝑓𝑖𝑥𝑒𝑑  
1 & 2  0.13+0.0553 𝑉0.6 0.072  
3 0.75+0.008 𝑉 0.12  
4 0.75+0.008 𝑉 0.12  
Note: 𝑉is the rated capacity in liters  
 
6.4. Standard Energy Consumption ( Estd) 
 
𝐸𝑠𝑡𝑑=𝐸𝑎𝑣 𝑠𝑡𝑎𝑛𝑑𝑏𝑦 + 𝐸𝑎𝑣 𝑓𝑖𝑥𝑒𝑑  
 
Table 3: Local Factor  
Appliance Category  Local Factor  
(kWh/24h)  
𝐸𝑙𝑜𝑐 
1 0.2 
2 0.1 
3 0.3 
4 0.3 
 
6.5. Calculated Energy Consumption ( Ecalc) 
 
𝐸𝑐𝑎𝑙𝑐 = 𝑄𝑝𝑟− 𝐸𝑎𝑣 𝑓𝑖𝑥𝑒𝑑 − 𝐸𝑙𝑜𝑐 
 
6.6. Energy Efficiency Index ( Ie) 
 
𝐼𝑒= 𝐸𝑐𝑎𝑙𝑐
𝐸𝑠𝑡𝑑 𝑋 100%  
Table 4: Energy Efficiency Index  
Star Rating  Energy Efficiency Index  
(%) 
𝐼𝑒 
5 𝐼𝑒 ≤  50 
4 50   < 𝐼𝑒 ≤  60 
3 60   < 𝐼𝑒 ≤   70  
2 70  < 𝐼𝑒 ≤    85 
1 85   < 𝐼𝑒 ≤ 100  
 
7. Annual Energy Consumption Calculation  
 
The annual ener gy consumption of the product shall be  calculated 
using the formula below:  
 
𝐴𝐸𝐶 =𝑄𝑝𝑟 𝑋 75 
 
Note: An assumption of an annual standby hour of 1,800 hours.  
8. Manufacturer Requirements  
 
Manufacturers of the product shall have an effective implementation of 
a Quality Management System for production and control based on 
the latest edition of ISO 9001 standard.  
9. Product Certification  
 
The product(s) shall comply with the requirements of a Model H 
conformity assessment.  
 
 
 
 
Annex A – Energy Eff iciency Label Design