1 
 Proposal for Amendments to the L egal Inspection Requirements fo r 
Electric Storage T ank Water Heaters 
 
By the Bureau of Standards, Metrology and Inspection (BSMI), Mi nistry of Economic 
Affairs   
Introduction: The “Requirements on Minimum Energy Performance Standard and En ergy Efficiency Rating 
Labelling and Inspection for Electric Storage Tank Water Heater s (Amendment Draft),” 
proposed by the Bureau of Energy (BOE), Ministry of Economic Af fairs, was notified on 2 
September 2022 as per G/TBT/N/TPKM/407/Rev.1. As the requiremen ts on the capacity of 
inner tank are included in the notified amendment draft, the BS MI proposes to remove 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 th is notified measure remain the 
same, i.e. Registration of Produc ts Certification (RPC) or Type -Approved Batch Inspection 
(TABI). 
 
Proposed 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)(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 13738-1: 2013 3. CNS 15663: 2013 Section 5 “Marking of Presence” 
4. For products covered in the scope of “Amendment 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,24”. 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 electric storage tank water heaters are not subje ct to legal inspection: 
(1) powered by USB cord/port, with input voltage of DC 5V and witho u t  A C  t o  D C  
adaptor; 
(2) powered by automotive power supply only and with automotive cig ar 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 cu rrent inspection standards will no longer apply from 1 
July 2025. 2 
 3. National deviations:  
(1) The supply cords shall comply with CNS 15767-1 “Plugs and socke t-outlets for 
household and similar purposes − Part 1: General requirements.”  
(2) Class 0 structure is not allowed. 
4. The certificate holders of the co mmodities shall follow the con tent stipulated in Section 5 
“Marking of presence” of CNS 15663 and clearly mark “the presen ce condition of the 
restricted substances” on the body, packages, stickers, or user  manuals. Those who utilize 
website as a means to announce “the presence condition of the r estricted substances” shall 
also clearly indicate the website  address on the body, packages , stickers, or user manuals. 
In that case, the requirements of  Section 5.3 of CNS 15663 are not applicable regarding 
the positions of the markings. 
5. Processing of applications: 
(1) Replacement: 
The certificate holders shall ensure compliance of their produc ts with the new Minimum 
Energy Performance Standard (MEPS), published by the Bureau of Energy, before 30 
June 2025. The expiration dates of the original certificates re main the same. Certificates 
will be rescinded in accordance with Paragraph 1, Article 16 of  the “Regulations 
Governing Type Approval of Comm odities” or Paragraph 9, Article  42 of the 
“Commodity Inspection Act” if the products do not comply with t h e  n e w  M E P S  
beginning on 1 July 2025. 
(2) New application or application for extension: 
The applicants shall prepare Type-Test reports based on the ins pection standards stated 
in the table above or the original ones, documents showing the location of the marking 
of presence, sample of the marking 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, an d an extended certificate  
will be valid for another 3 year s. Where the products do not co mply with the new MEPS, 
the expiry date of the certificate will be only valid till 30 J une 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 shall be printed by the certifica te holders. The 
identification number of the Commodity Inspection Mark consists  of “a Letter (R or T),” 
“Designated Code (5 digits)” and “the presence conditions of th e restricted substance” 
(e.g. RoHS or RoHS(XX,XX)). 
(2) The identification number shall be placed below or right next t o 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 promine nt location of the 
commodities. The Mark shall use materials that are not easily a ltered, and the content 
shall be in a clearly identifiable and indelible form affixed p ermanently to the 
commodity. 
(4) For RPC scheme, the examples of t he Commodity Inspection Mark a re listed below: 
 
   
 
 
(5
 
 
 
 
(6
7. T
ta
th
o
8. T
th
im
9. C
r
 5) For TABI 
6) “RoHS” i n
CNS 156 6
“RoHS(X X
XX, …), o
value of p r
Restricted 
Examples:  RoHS 
(
commo d
15663. 
 RoHS ( C
certain p
specifie d
The C.C.C. C
able shall s t
hough its C .
of Finance, o
The inspecti o
his announ c
mplementat i
Commoditie s
respective in sscheme, th e
ndicates the 
63, does not 
X,XX)” indi c
other than e x
resence cond
substances: P
 
(Pb) indicat e
dity exceed s
Cd, Cr+6, PB
parts of the 
d in Annex A
Code listed i n
till complet e
.C.C. Code i
or Bureau of F
on standards 
cement. If a
ion date of t h
s w i t h  c o m b
spection sta n
 examples o f
content of r e
exceed the r e
cates the co n
xemptions st a
ition. 
Pb, Cd, Hg, C
es that the 
 t h e  r e f e r e n
BB) indicate s
commodit y
A to CNS 15
n the table i s
 the inspect i
is identified 
Foreign Tra d
of the prod u
any updated 
he updated v e
bined featur e
ndards and c o
 
3 or 
f the Comm o
or 
estricted sub
eference per
ntent of rest r
ated in CNS 
Cr+6, PBB, a
percentage 
nce percenta g
s that the pe r
y exceeds t h
663. 
s used for re f
ion procedu r
differently b
de, Ministry 
ucts listed in 
d version is 
ersion in fur t
es or multif u
onformity a s
odity Inspec t
stance(s), ot h
centage val u
ricted substa n
15663, exc e
and PBDE.
content of 
ge value sp e
rcentage co n
he respectiv e
ference only .
res before e n
by the Cust o
of Economi c
the table sh a
available, t
ther announ c
unctional pr o
ssessment pr o
tion Mark ar e
her than exe m
ue of presenc
nce(s) (ele m
eeds the refe
Pb in cert a
ecified in A
ntent of Cd, C
e reference p
. The comm o
ntering into 
oms Admini s
c Affairs. 
all be the ver
the BSMI s
cemen t. 
oducts shall 
ocedures of R
e listed belo w
mptions sta t
ce condition. 
ment XX, ele
erence perce n
ain parts o f
Annex A to C
Cr+6, and P B
percentage v
odity listed i
the market 
stration, Mi n
rsion publis h
shall publis h
comply wit h
RPC schem e
w: 
ed in 
ment 
ntage 
f t h e  
CNS 
BB in 
value 
n the 
even 
nistry 
ed in 
h t h e  
h t h e  
e. 4 
 Table 1. Example of markings for the presence conditions of the  restricted substances exceeds 
the reference percentage value of presence conditions  
Equipment name: Electric storage tank water heaters, 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 “excee ding 0.01 wt %” indicate that the percentage content of the 
restricted substance exceeds the reference percentage value. 
Note 2:   “○” indicates that the percentage content of the restricted subst ance does not exceed the 
reference percentage value. 
Note 3:   The “−” indicates that the rest ricted substance is exempted. 
 
  5 
 Table 2. Example of markings fo r the content of the restricted substances other than 
exemption do not exceed the refe rence percentage value of prese nce condition 
Equipment name: Electric storage tank water heaters, 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 rest ricted substance is exempted. 
(*) The “name and model” can be  omitted if the position of the “markings for the presence 
conditions” clearly identifies t he corresponding commodity. Mul tiple types could be shown 
together if the “markings for t he presence conditions” are appl icable.  