Requirements for Labelling and Inspectio n of Energy Consumption and Energ y 
Efficiency Rating for Inst antaneous Gas Water Heaters 
 (Draft) 
 
Basis: Paragraph 4, Article 14 of the Energy Management Act 
Content:  
I. Scope of applicability: 
The Instantaneous Gas Water Heaters denoted  in this Anno uncem ent are those m eeting 
the definition of Instantaneous Gas Water H eaters as defined in CNS 13603, and promulgated 
by the Bureau of Standards, Metrology and In spection (BSMI) of the Ministry of Econom ic 
Affairs (MO EA) as products requ iring inspection before m arketing. 
II. Method of test:  
The therm al efficiency value of Instantaneous  Gas W ater Heaters s hould be tested under 
the term s and in the method which m ust satisf y the requirem ents set forth in the Chinese 
National S tandards “CNS 13603 j Gas burning water heaters for dom estic use”. 
III. Energy consumption rate and efficiency labelling:   
(I) Dimension of  Labelling  
100mm  long, 70mm  wide. 
(II) Specim en and specifications of labelling 








(III) The labelling should include the following item s: 
1. Product nam es(Instantaneous Gas Water Heaters) 
2. Product m odel num ber(Fuel Type) 
3. Gas consumption(kW ) 
4. Therm al effi ciency value 
 5. Energy efficiency rating  
6. The year and announcem ent numbe r of the Announcem ent containing the Criteria 
for Energy Efficiency Rating of Instantaneous  Gas W ater Heaters  used  for th is ratin g 
determ inatio n 
7. Registration num ber for this rating 
8. Other text as designated by th e Central Com petent Authority  
(IV) Labelling posting: 
While displaying or m arketing the products , the dealer shall display or post the 
labelling on the front of the products, and sha ll not hide, destroy or adopt other m eans to 
render the labelling not r ecognizable by the consum ers. W hile manufacturing or 
importing the products, the product manufacturer or im porter sh all place the labelling in 
a prom inent area on the front of the products. 
(V)  Energy efficiency rating:  
The products shall be classified for ener gy efficiency rating based on the therm al 
efficiency v alue shown in the follo wing ta ble and shall be rem arked onto the energy 
efficiency labelling.  
Fuel Type Energy efficiency 
rating Thermal efficiency value 
(%) 
Class 1  88.0 
Class 2  83.0 
Class 3  79.0 
Class 4  75.0 Liquefied 
Petroleum  Gas 
(LPG)eNatural 
Gas (NG)  Class 5  70.0 
(VI) Post-m arket surveillan ce action s: 
While m onitoring the im plem entatio n of the energy efficien cy rating s cheme, the 
Central Competent Authority m ay conduct annual product sam pling and testing; the 
Central Competent Authority m ay designate the sam pled products and the dealer shall 
send the product sam ples to designated testin g laboratory within the allowed tim e. In 
principle, the num ber of products first sam pled and tested shall be decided based on the 
sales num ber of the designated products of th e previous year, and one sam ple shall be 
tested out of  10,000 units of such products so ld. If less than 10,000 uni ts were sold for 
that produ ct in the pr ior year, one sam ple shall be test ed. Nonetheless, the Central 
Com petent Authority m ay change the sam pling ratio based on actual needs. 
 
 
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