Requirements on Minimum Energy Performance Standard and 
Energy Efficiency Rating Labelling and Inspection of Air 
Compressors  (draft)  
1. The air compressors referred to in this Announcement are 
those driven by a three -phase motor at an outlet pressure of 
7~14± 0.5 kg f/cm2 (“Air Compressors” or “products” 
hereafter), including the fixed speed rotary air compressors, 
variable speed rotary air compressors and piston air 
compressors that are in compliance with the applicable scope 
indicated in the Appendix 1.  
2. The Ai r Compressors shall be tested for the energy 
efficiency measured value pursuant to the currently effective 
CNS 10213 (Annex C) or other approved equivalent means 
International Organization for Standardization (“ISO”) 1217 
(Annex C).  
The measured energy eff iciency values of Air Compressors 
in the preceding paragraph shall not be lower than the 
minimum energy performance standard requirements for  Air 
Compressors (see Appendix 2) and shall be above the 
product rated value.  
3. Before importing or manufacturing  the Air Compressors, 
product s dealers shall submit the following documentation to 
the relevant Central Authority to apply for the registration 
account and password for Minimum Energy Performance 
Standard M anagement System(“Management System”) for 
accessin g the said system:  
  (1) Application for Management System Registration Account and Password (Appendix 3).  
     (2) The dealer’s corporate registration certificate or 
commercial registration certificate, or the copies of other 
equivalent documentation.  
4. After obtaining a Management System account and password, 
the dealer shall submit the following documentation to the 
relevant Central Authority in order to apply for approval of 
the energy efficiency rating and labelling:  
       (1) Application for Regi stration of Air Compressors Energy 
Efficiency Rating and Labelling (see Appendix 4).  
  (2) Each category of Air Compressors is of four range s (1) 
3.7kW ~ less than 7.5kW;(2) 7.5kW ~ less than 37kW; (3) 
37kW ~ less than 75kW and (4) above 75kW; The dealer 
shall provide a copy of the Test Report on Product Energy 
Efficiency  or an optical disk storing the file of the same 
of two models of product when applying for the 
registration of Air Compressors Energy Efficiency Rating 
and Labelling for more than three models of product (the 
copy of said submitted report must be stamped with 
official corporate seal); While applying for the 
registration of Air Compressors Energy Efficiency Rating 
and Labelling for equal to or less than two models of 
product, the Test Repo rt on Product Energy Efficiency or 
an optical disk storing the file of the same of all models 
of product shall be submitted ( the copy of said submitted 
report must be stamped with official corporate seal) .  
     (3)A Power of Attorney (Appendix 5) if the  dealer 
commissions others for applying the registration  5. The energy efficiency test report mentioned in Section 4.(2) 
shall be issued by certified authorities that are members to  
the mutual recognition agreement signed by the Taiwan 
Accreditation Foun dation (“TAF” hereafter) and the 
International Laboratory Accreditation Cooperation (“ILAC” 
hereafter), laboratories certified by the Bureau of Standards, 
Metrology and Inspection, MoEA, Bureau of Energy, MoEA, 
etc., or by Underwriters Laboratories Inc. (“ UL” hereafter) 
and Technischer Ü berwachungs -Verein (“TÜV” hereafter).  
Three -phase motors with different rated power, number of 
poles, drive link method, cooling method, compression 
stages, Air -end brand, type and dimension, outlet pressure 
and inlet volume  flow rate at full load of Air Compressors 
shall be deemed as different basic model Air Compressors.  
6. The Central Authority shall approve the application for the 
registration of energy efficiency rating  by the Energy 
Efficiency Rating  Standard Requiremen ts Table (see 
Appendix 6) pursuant to the Energy Efficiency Test Report 
and Energy Efficiency value registered by the dealers.  
7. When manufacturing or importing the Air Compressors, the 
dealer shall re -apply for the registration for the energy 
efficiency  rating in the following instances:  
(1) The design of the product has been changed and such 
change affects its rating  of energy efficiency.  
  (2) The product model number has been changed.  
8. While manufacturing or importing the products, the dealer 
shall  post the following items on metal nameplates on a 
prominent area of the product. These items shall all be labeled in Traditional Chinese, except for unit symbols, 
special characters, trademark and symbol that are not able to 
be indicated by Traditional Ch inese. The dealer shall not  
conceal, destroy or render otherwise to make the following 
information unrecognized:  
    (1) Manufacturer’s name or trade mark;  
    (2) Companies liable for the labelling;  
      (3) Name of the Product: e.g. fixed speed rotary air 
compressors, variable speed rotary air compressors, 
piston air compressors;  
    (4) Product model number: Different models (basic models) 
shall have different model numbers;  
    (5) Rated power (kW): Referring to Rated output power of 
three -phase motor s; 
    (6) Input power at full load (kW);  
    (7) Operating frequency at full load (Hz): Only applicable to 
variable speed rotary air compressors;  
    (8) Inlet volume flow rate at full load (m3/min);  
    (9) Outlet pressure (kg f/cm2); 
    (10) Efficiency (%) (isentropic efficiency); and energy 
efficiency rating (grade1, grade2, grade3 );  
    (11) Product Registration Number;  
    (12) Year of manufacture.  
  Air Compressors shall be labeled in conformity with the 
requirements set forth in the preceding parag raph when being 
merchandised or retailed .  9. The dealer shall report the volume of product sales during the 
prior year in the Management System before the end of 
February of each year.  
10. The relevant Central Authority may conduct annual product 
sampl ing and testing; the relevant Central Authority may 
designate the model and number of the sampled products and 
the dealer shall send the product samples of the designated 
testing laboratory for testing within the designated period. 
The measured value obtai ned through such testing shall be 
above the labelled value and the product must comply with 
the  minimum energy performance standard and e nergy 
efficiency rating standard requirements for Air Compressors .     
If the above requirements are not met, the rel evant Central 
Authority will inform the dealer to conduct re -testing. The 
number of the re -tested samples of the same product type as 
the first ones shall be double the number of the first -tested 
products, and the dealers shall bear all the costs associate d 
with the re -testing.  
11. If the product testing or re -testing is not conducted, or if not 
all re -tested samples comply with the requirements, the 
relevant Central Authority shall nullify its energy efficiency 
rating label pursuant to Article 21 and Art icle 24 of the 
Energy Management Act where the dealer fails to complete 
the corrective actions. However, if the dealer cannot conduct 
said testing due to the fact that the designated sampling and 
testing products are no longer produced or imported, the 
dealer can be exempted, provide that the dealer obtains 
approval from the Central Authority and cancels its energy efficiency rating and labelling registration for those products 
that are no longer produced or imported.  
The relevant Central Authority shall re lease such testing 
information on the Management System pursuant to the 
Consumer Protection Act.   
 12.The number of the first sampling and testing products in 
Section 10 shall be determined based on the total number of 
the product sold during the previous  year: one sample shall be 
tested out of 150 units of fixed speed rotary air compressors, 
a maximum of 5 units for each dealer. If less than 150 units 
were sold in the prior year, one sample shall still be tested. 
One sample shall be tested out of 50 units  of variable speed 
rotary air compressors, a maximum of 5 units for each dealer. 
If less than 50 units were sold in the prior year, one sample 
shall still be tested. One sample shall be tested out of 200 
units of piston air compressors, a maximum of 5 unit s for 
each dealer. If less than 200 units were sold in the prior year, 
one sample shall still be tested.   
Nonetheless, the relevant Central Authority may change the 
sampling model or number based on actual needs.  
 
 
 
 
 Appendix 1  
Applicable Air Compresso rs 
(1) Fixed speed rotary air compressors at the rated frequency 60 Hz:  
 1. Rated power is 3.7kW/5HP to 200kW/270HP with the inlet volume flow rate 
greater than or equal to 0.4 m3/min at full load.  
 2. A fixed speed rotary air compressor means an air compr essor in which air 
admission, forced expansion, and diminution of its successive volumes or its 
forced discharge is performed cyclically by rotation of one or several rotors in 
an oil -injected compressor casing and not equipped with a variable speed drive 
when placed on the market;  
(2) Variable speed rotary air compressors:  
 1. Rate power is 7.5kW/10HP to 200kW/270HP  with inlet flow rate  greater 
than or equal to 1.0  m3/min at full load.  
   2. A variable speed rotary air compressor means an air compressor w hich is 
equipped with a variable speed drive when placed on the market. Variable 
speed drive means an electronic power converter integrated — or functioning 
as one system — with the motor(s) driving the compression element(s), that 
continuously adapts the electrical power supplied to the electric motor in order 
to control the mechanical power output of the motor according to the 
torque -speed characteristic of the load being driven by the motor, excluding 
variable voltage controllers where only the supply vo ltage for the motor is 
varied . 
(3) Piston air compressors at the rated frequency of 60 Hz:  
 1. Rated power is 3.7kW/5HP to 22kW/30HP with the inlet volume flow rate 
greater than or equal to 0.4 m3/min at full load.  
   2. A piston air compressor means an ai r compressor in which air admission, 
forced expansion and diminution of its successive volumes or its forced 
discharge is performed cyclically by a piston reciprocating in an oil -lubricated 
cylinder.  
 
This Regulation shall not apply to the following  items:  
(1) The air compressors designed for the purpose of handling hazardous gases . 
(2) The air compressors designed specifically for the purpose of operating in a 
potentially explosive environment . 
(3) The air compressors designed for the purpose of functionin g in a place  where 
average inlet air temperature is below -15°C or above 100°C . 
 Appendix 2  
 
Minimum energy performance standard requirements for  Air 
Compressors  
 
The minimum energy performance standard requirements for  Air Compressors (including 
the ov erall efficiency of the motor) shall be calculated according to the following formulas:  
(1) Fixed speed rotary air compressors  
b=(-0.928 ln2(V1)+13.911 ln(V 1)+27.110)+(100 -(-0.928 ln2(V1)+13.911 
ln(V 1)+27.110))*d/100  
(2) Variable speed rotary air compress ors 
b =(-1.549 ln2(V1)+21.573 ln(V 1)+0.905)+(100 -(-1.549 
ln2(V1)+21.573ln(V 1)+0.905))*d/100  
(3) Piston air compressors  
b =(8.931 ln(V 1)+31.477)+(100 -(8.931 ln(V 1)+31.477))*d/100  
The parameters in (1), (2) and (3) above -mentioned are described as follows : 
b : energy efficiency requirements (%)  
V1: inlet volume flow rate (l/s), at full load  
 d: Proportional loss factor   d= -5 
Note: 1. The measured value of the inlet volume flow rate at full load shall not be less than 
the rated value of product. The measu red energy efficiency value shall not be less 
than b calculated by the formula and shall be greater than or equal to the rated 
values of product. The rated values of product shall conform to requirements on 
the minimal energy performance standard of air c ompressors (appendix 3).  
2. The measured energy efficiency value of air compressors is calculated to the first 
place of decimal fraction and rounded up after decimal fraction.  
3. The measured energy efficiency value of air compressors for fixed speed rotar y 
air compressors and piston air compressors is:  
 
 
Where  = Isentropic efficiency of air compressors (%)  = inlet volume flow rate (l/s), at full load  
= outlet pressure (bar(a)), at full load, absolute pressure at outlet is a 
sum of gauge pressure and atmosphere pressure at standard state 
(The standard state is defined as 100kpa=1bar; 1bar=1.02kg f/cm2) 
Preal = Input power ,at full load (kW)  
4. The measured energy efficiency value of air compressors for variable speed 
rotary air co mpressor is:  
    
 
= isentropic efficiency , at 100%, 70% and 40% of inl et volume fl ow 
rate  
= weighing factor. For 100%, 70% and 40% of inlet volume flow rate,  
the weighing factors are 25%, 50% and 25%, respectively.  
5. 100% of inlet volume flow rate for variable speed rotary air compressors shall be 
tested according to the operating frequency at full load (Hz) labelled by the 
supplier.  
 
 Appendix 3  
 
 
Minimum Energy Performance Standard Management System 
Account and Pa ssword Application Form  
Prepared on (ROC year,month,date)  
 
Applicant (Company):                                      
Applicant :             Tel:              Fax:                  
E-MAIL:                                               
 
Category of the Product :                                  
Account ID:                                               
Password:                                                
 
This company is applying for login and use of the Standard on Permitted 
Energy Consumption Management Syste m and shall be responsible for the 
information provided or registered.  
Stamp(the company and the responsible person’s seal):  
 
 
 
 
 
               (official company and responsible person seal ) 
 
 Appendix 4  
 
   
Energy Efficiency Rating Labelling Regist ration Application 
Form for the Air Compressors  
Prepared on (ROC year,month,date)  
1. Applicant (Dealer) Information  
Company name:                                     
Company address:                                      
Responsible Person:          Business  ID:                     
Contact:           Department:           Title:             
Tel:             Mobile:           Fax:               
Email:                                            
2. Name of the Manufacturer or its trade mark  
                                                 
3. Manufacturer name and address  
  □same as the applicant dealer  
Manufacturer name:                                    
Manufacturer address:                                   
4. Contents of energy efficiency rating labelling registration  Application number:  No. M od e
l N o.  Nam e  Th r ee -p
h ase 
moto r 
rated  
p o wer 
(k W)  M otor 
t yp e  Op eratin g 
fr eq u en c y  
(H z)  In p u t 
p o wer 
at fu ll 
load  
(k W)  In let 
vo lu m e 
flo w rat e 
at fu ll 
load  
(m3/min )  Ou tlet 
p res su r e 
kg f/cm2 Is en t rop ic 
ef fici en c y 
(%) En er g y 
ef fici en c y 
ratin g  Coo lin g 
meth od  Comp r essi on  
stag e  Dri ve 
lin k  
meth od  Ai r-en d  
b ran d  typ e 
an d  
d imen sion s  Remark  
1                
2                
3                
Note: Please login the  Minimum Energy Performance Standard Management System to fill out the application form and download 
for further use.  
5. Application declaration and affidavit  
This company hereby declares to the central competent authority that information contained in this Energy Efficiency 
Rating  Labelling Registration Application Form and the attached documentations ar e all true and be responsible for 
any error. This company shall bear all the legal responsibility as well. This company hereby declares that products 
available on the markets shall have the same energy efficiency rating labelling information as given in th is application 
form. In case of any error and falseness, this company, without any objection, shall be subject to penalties of 
registration revocation and any disposition under the energy management regulations.  
Stamp(company and responsible person’s seal ):  
 
 
 
             (official company and owner chop )Appendix 5  
Energy Efficiency Rating  Labelling Registration Application of 
the Air Compressors  
Power of Attorney  
For the application for the registration of energy efficiency rating  labelling , the 
Prin cipal here by grants the Agent , according to the Item 4.3 -1 of the 
“Requirements on Minimum Energy Performance Standard and Energy 
Efficiency Rating Labelling and Inspection of Air Compressors  ” , the power for 
filing the application on behalf of the prin ciple. The Principle hereby issues the 
Power of Attorney.  
Attention to  
Bureau of Energy, MoEA  
Principal company name:  
Responsible Person:                                   
Address:  
Business ID:  
Tel:  
 
 
(Principal company and Responsible Person  seal ) 
Agent  company name:                                        
Responsible Person:   
Address:  
Business ID:  
Tel:  
 
 
(Agent Company and Responsible Person  seal  ) 
Prepared on (ROC year,month,date)  Appendix 6  
 
Energy Efficiency Rating  Standard Requirements Table  for A ir 
Compressors  
Energy 
efficiency rating  Grade 3  Grade 2  Grade 1  
Proportional loss 
factor; d  -5 ≤ d<0  0≤d<5  d≥5 
 
Note: The above table is applicable to the proportional loss factor. The rest calculation 
shall be subject to the calculation formula and regulations in appendix 1.