1 
 Amendment s to the L egal Inspection Requirements  for Electric 
Storage Tank Water Heater s 
 
By the Bureau of Standards, Metrology and Inspection  (BSMI), Ministry of Economic 
Affairs   
 
Introduction:  
The “Requirements on Minimum Energy Performance Standard and Energy Efficiency Rating 
Labelling and Inspection for Electric Storage Tank Water Heaters ” was adopted by the Bureau 
of Energy (BOE), Ministry of Economic Affairs  on 9 December  2022 . As the requirements on 
the capacity of inner tank are included in the adopted texts , the BSMI remove d the 
requirement of Section 8.11  “Capacity of inner tank ” of CNS 11010:2013 from BSMI ’s testing 
items to avoid overlapping jurisdiction with the BOE . 
 
The conformity assessment procedures for products subject to this notified measure remain the 
same, i.e. Registration of Produc ts Certification (RPC) or Type -Approved Batch Inspection 
(TABI).  
 
Date of implementation:  
1 July 2025  
 
Description 
of Goods  Inspection Standards  C.C.C. Code (the first 6 
digits are the same as 
HS Code)( For 
reference)  
Electric 
storage tank 
water heater 
(inspection 
scope: solar 
water heaters  
not included;  
rated voltage 
not 
exceeding 
single -phase 
250V AC)  1. CNS 60335 -1: 2014  & 
CNS 60335 -2-21: 2015 
2. CNS 13 738-1: 2013 
3. CNS 15663:  2013  Section 5 “Marking of Presence ” 
4. For products covered in the scope of “Amend ment  to 
Requirements on Minimum Energy Performance Standard 
and Energy Efficiency Rating Labelling and Inspection for 
Electric Storage Tank Water Heaters ”: 
CNS 11010 : 2013, Section 8.14 “Standardized standby loss 
of every 24 hours, Est,2 4”. The measured efficiency and 
standby power shall comply with the Table of “MEPS for 
Electric Storage Tank Water Heaters .” 8516.10.00.00.9B  
 
Conformity assessment procedures : No change.  
 
Related requirements : 
1. The following e lectric storage tank water heater s are not subject to legal inspection : 
(1) powered by USB cord/port , with  input voltage of DC 5V and without  AC to DC adaptor ; 
(2) powered by automotive power supply only and with automotive cigar lighter ; and  
(3) Powered by three -phase voltage or batteries.  
2. The changes made to the inspection standards listed above will come into force  on the date 
of announcement  and the current  inspection standards  will no longer apply  from 1  July 2025 . 
3. National deviation s:  2 
 (1) The supply cords shall comply with CNS 15767 -1 “Plugs and socket -outlets for 
household and similar purposes − Part 1: General requirements .” 
(2) Class 0 structure is not allowed.  
4. The certificate holders  of the commodities  shall  follow  the content stipulated in  Section 5 
“Marking of presence ” of CNS 15663  and clearly mark  “the presence condition  of the 
restricted substance s” on the body, package s, stickers , or user manuals . Those who utilize  
website as a means to announce  “the presence condition  of the restricted substance s” shall 
also clearly  indicate  the website address on the body, package s, stickers,  or user manuals . In 
that case, t he requirement s of Section 5.3 of CNS 15663 are  not applicable regarding  the 
position s of the markings.  
5. Processing of applications : 
(1) Replacement:  
The certificate holders shall ensure compliance of their products with the new Minimum 
Energy Performance Standard  (MEPS), published by the Bureau of Energy, before 30 June 
2025 . The expiration date s of the original certificates remain the same. Certificate s will 
be rescinded in accordance with Paragraph 1, Article 16 of the “Regulations Governing 
Type Approval of Commodities ” or Paragraph 9, Article 42 of the “Commodity Inspection 
Act” if the product s do not comply with the new MEPS beginning on 1 July 2025. 
(2) New a pplication  or application for e xtension : 
The applicants shall prepare Type -Test report s based on  the inspection standards  stated in 
the table above  or the original ones , documents showing  the location of the marking of 
presence, sample of the marki ng of presence (see Table 1 and Table 2), “Declaration of 
the Presence Condition of the Restricted Substances Marking ” and demonstration of 
compliance with the new MEPS  when making the applications . The validity period of a 
new certificate will be 3 years  from the date of issuance , and an  extended certificate  will 
be valid for another 3 years. Where the products do not comply with the new MEPS, the 
expiry date of the certificate will be only valid till 3 0 June 2025. New applications or 
applications for extension shall comply with new MEPS beginning on 1 July 2025.  
6. The Commodity  Inspection Mark : 
(1) The Commodity Inspection Mark sh all be printed by the certificate holder s. The 
identification number of the Commodity Inspect ion Mark consists of  “a Letter  (R or T) ,” 
“Designated  Code (5 digits )” and “the presence conditions of the restricted substance ” 
(e.g. RoHS or RoHS(XX,XX)) . 
(2) The identification number shall be placed below or right next to  the graphic symbol  and 
“the presence conditions of the restricted substance ” shall be indicated  in the second row.   
(3) The size  of the Mark can be applied  proportionally  on a prominent location  of the 
commodit ies. The Mark shall use materials that are not easily altered, and the content  
shall be in a clearly identifiable and indelible form affixed permanently to the commodity.  
(4) For RPC scheme, the examples of the Commodity Inspection Mark  are listed below:  
 
 
 
or 
 
 
3 
 (5) For TABI scheme, the examples of the Commodity Inspection Mark  are listed below:  
 
or 
 
 
 
(6) “RoHS” indicates the content of restricted substance(s), other than exemptions stated in 
CNS 15663,  does not exceed  the reference percentage value of presence condition.  
“RoHS(XX,XX)” indicates the content of restricted substance(s) (element XX, element 
XX, …), other  than exemptions  stated in CNS 15663, exceeds the reference percentage 
value of presence condition.  
Restricted substances: Pb, Cd, Hg, Cr+6, PBB, and PBDE.  
Example s:  
 RoHS  (Pb) indicates that the percentage content of Pb in certain parts of the commodity 
exceeds the  reference percentage  value specified in Annex A to CNS 15663.  
 RoHS  (Cd, Cr+6, PBB ) indicates that the percentage content of Cd, Cr+6, and PBB in 
certain parts of  the commodity exceeds the respective reference percentage value 
specified in Annex A to CNS  15663.  
7. The C.C.C. Code listed in the table is used for reference only. The commodity listed in the 
table shall  still complete th e inspection  procedures before entering into the market even 
though its C.C.C. Code is  identified differently by the Customs Administration, Ministry of 
Finance , or Bureau of Foreign Trade,  Ministry of Economic Affairs . 
8. The inspection standards of the products listed in the table shall be the version published in 
this announcement. If any updated version is available, the BSMI shall publish the 
implementation date of  the updated version in further announcement . 
9. Commodities with combined features  or multifunction al products  shall comply with the  
respective inspection standards and conformity assessment procedures of RPC  scheme . 
  
4 
 Table 1. Example of marking s for the presence conditions of the restricted substance s 
exceed s the reference percentage value of presence conditions  
Equipment name:  Electric storage tank water heater s, Model：XXX(*) 
Unit Restricted substances and its chemical symbols  
Lead  
 
(Pb) Mercury  
 
(Hg) Cadmium  
 
(Cd) Hexavalent 
Chromium  
(Cr+6) Polybrominated 
Biphenyls  
(PBB)  Polybrominated 
Diphenyl Ethers  
(PBDE)  
Circuit board  Exceeding 
0.1 wt %  ○ ○ ○ ○ ○ 
Heater  ○ ○ ○ ○ ○ ○ 
Power 
switch  ─ Exceeding  
0.1 wt %  ○ ○ ○ ○ 
Power cord  ○ ○ ○ ○ ○ ○ 
Shell  ○ ○ Exceeding  
0.01 wt %  ○ ○ Exceeding  
0.1 wt %  
Note 1:   “Exceeding 0.1 wt %” and “exceeding 0.01 wt  %” indicate that the percentage content of the 
restricted substance exceed s the reference percentage value.  
Note 2:   “○” indicates that the percentage content of the restricted substance does not exceed the 
reference percentage value.  
Note 3:   The “−” indicates that the restricted substance is exempt ed. 
 
  5 
 Table 2. Example of marking s for the content of the restricted substance s other than 
exemption do not exceed the reference percentage value of presence condition  
Equipment name:  Electric storage tank water heater s, Model：YYY(*) 
Unit Restricted substances and its chemical symbols  
Lead  
 
(Pb) Mercury  
 
(Hg) Cadmium  
 
(Cd) Hexavalent 
chromium  
(Cr+6) Polybrominated 
biphenyls  
(PBB)  Polybrominated 
diphenyl ethers  
(PBDE)  
Circuit board  ○ ○ ○ ○ ○ ○ 
Heater  ○ ○ ○ ○ ○ ○ 
Power switch  − ○ ○ ○ ○ ○ 
Power cable  ○ ○ ○ ○ ○ ○ 
Shell  ○ ○ ○ ○ ○ ○ 
Note 1:   “○” indicates that the percentage content of restricted substance does not exceed 
the reference percentage value . 
Note 2:   The “−” indicates that the restricted substance is exempt ed. 
(*) The  “name and model ” can be omitted if the position of the “markings for the presence 
conditions ” clearly identifies  the corresponding commodity. Multiple types  could be shown 
together if the “markings for the presence conditions ” are applicable .