1 Requirements  on Minimum Energy Performance Standard  and Inspection  
of water dispenser supplied by packaged drinking water  (Draft)  
Subject
 Announcement for the Requirements on Minimum Energy Performance 
Standard  and Inspection of  sater dispenser supplied by packaged 
drinking water  
Basis
  Paragraph 4, Article 14 of the Energy Management Act  
Announcement
  
1. Domain
 The water dispenser supplied by packaged drinking water  denoted in this  
announcement are those meeting the definition in CNS 15929 , and promulgated by 
the Bureau of Standards, Metrology and Inspection (BSMI) of the Ministry of 
Economic Affairs (MOEA) as products requiring inspection before marketing.  
2. Test Method
 The 24-hour energy consumption  (𝐸24) (for Iced-Warm -Hot type) , 
normalized standing loss per 24 -hour value  (𝐸𝑠𝑡,24) (for Hot-Warm type)  of the water 
dispenser supplied by packaged drinking wate r shall be tested following  the terms and 
method in CNS 15929 . 
3. M inimum Energy Performance Standard  (MEPS)
  
  (1) Hot-Warm type: The tested value  of normalized standing loss per 24 -hour value  
(𝐸𝑠𝑡,24) shall not be greater  than the standard  value  specified in the Table 1 and not 
exceed 105% of the declare d value on products . 𝐸𝑠𝑡,24 is calculated by the following 
equation
  
𝐸𝑠𝑡,24=𝐸24×(75
𝑇ℎ−𝑇𝑎𝑚𝑏)1.875
 
𝑇ℎ is the 24-hour average temperature  of hot-water system    
𝑇𝑎𝑚𝑏 is the ambient temperature  
The measured value, 𝐸𝑠𝑡,24 , shall be rounded off to three  decimal place s 
(2) Iced-Warm -Hot type: The tested value  of power consumption for preparation per 
24-hours ( 𝐸24) shall not be greater  than the standard  value  specified in the Table 2 and 
not exceed  105% of the declare d value on products , where t he measured value, 𝐸24 ,  2 shall be rounded off to three decimal places . 
4. Label
    
(1) H ot-Warm type:  the declare d values  of hot-water  tank and 𝐸𝑠𝑡,24 shall  be 
marked on the appliance surface  or in the product instruction/manual . 
(2) Iced-Warm -Hot type: the declare d values  of hot-water  and iced -water tank and 
𝐸24 shall  be marked on the appliance surface  or in the product instruction/manual . 
5. Market surveillance ：The authority may conduct random sampling tests for energy 
efficiency checks  of w ater dispenser supplied by packaged drinking water . The 
supplier shall deliver models specified by the authority  to the given labs before given 
date.   3 Table 1  MEPS for Hot-Warm Type  
 
𝐸𝑠𝑡,24
  
 
Note： 
1. V is the declare d value  of hot-water  tank.  V shall be rounded off  to one  decimal place.  
   4  
Table 2 MEPS for Iced -Hot-Warm Type  
 
𝐸24
  
𝑉𝑒𝑞
 
Note： 
1. 𝑉𝑒𝑞=𝑉1×𝐾1+(𝑉2×𝐾2)/3 
2. 𝑉1 is the declared values of hot -water tank(unit
 liter)  
3. 𝑉2is the declared  values of iced -water tank(unit
 liter)  
4. 𝑉1 and 𝑉2 shall be rounded off  to one  decimal place . 
5. According to CNS 15929  Section 11.12, the ambient temperature  (𝑇𝑎𝑚𝑏), 24-hour 
average temperature of hot-water system  (𝑇ℎ), and  24-hour average temperature of 
iced-water system  (𝑇𝑐) are measured. To calculate 𝐾1 and 𝐾2, as follows
  
(1) 𝐾1 = (𝑇ℎ –𝑇𝑎𝑚𝑏) / (100 –𝑇𝑎𝑚𝑏) 
(2) 𝐾2 = (𝑇𝑎𝑚𝑏 –𝑇𝑐) / (𝑇𝑎𝑚𝑏) 
(3) 𝐾1 and 𝐾2 shall be rounded off to three  decimal place s.