EN   EN 
 
 
 EUROPEAN  
COMMISSION   
Brussels, XXX   
[…](2023) XXX  draft  
ANNEXES 1 to 5  
 
ANNEXES  
to the  
COMMISSION REGULATION  
implementing Directive 2009/125/EC of the European Parliament and of the Council 
with regard to ecodesign requirements for fans driven by motors with an electric input 
power between 125 W and 500 kW and repealing Commission Regulation (EU) 
No 327/2011    
EN 1  EN ANNEX I  
Definitions applicable for the  purposes of  the Annexes  
(1) ‘measurement category’ means a test, measurement or usage arrangement that 
defines the inlet and outlet conditions of the fan being tested; 
(2) ‘measurement category A’ means an arrangement where the fan is measured with 
free inlet and outlet conditions , and a  partition between inlet and outlet zone;  
(3) ‘measurement category B’ means an arrangement where the fan is measured with 
free inlet and with a duct fitted to its outlet , and a partition between inlet and outlet 
zone;  
(4) ‘measurement category C’ means an arrang ement where the fan is measured with a 
duct fitted to its inlet and free outlet conditions , and a partition between inlet and 
outlet zone;  
(5) ‘measurement category D’ means an arrangement where the fan is measured with a 
duct fitted to its inlet and outlet , and a partition between inlet and outlet zone;  
(6) ‘measurement category E’ means an arrangement where the fan is measured with 
free inlet and outlet conditions , and without a partition between inlet and outlet zone;  
(7) ‘efficiency category’ means the fan gas output energy form used to determine the fan 
energy efficiency, with a distinction between ‘static ’ or ‘total’ efficiency depending 
on whether the fan gas power has been determined with respectively the fan static 
pressure or fan pressure;  
(8) ‘fan efficiency’ ( η) means  the ratio of the fan gas power output Pu and the electric 
input power Pe, both expressed in W and determined at BEP, multiplied with 
correction factors for power conversion Cp, part load compensation Cc and guard 
compensation Cguard, with a distinction between ‘static ’ or ‘total’ efficiency 
depending on whether the fan gas power Pu has been determined with respectively 
the fan static  pressure  or fan pressure;  
(9) ‘fan gas power’ ( Pu), in W, means  the product of the volume flow rate  qv, in m³/s, 
and the pressure difference between fan in let and outlet Δ p, in Pa, both determined at 
BEP, with a distinction between ‘static’ or ‘total’ fan gas power depending on 
whether the fan gas power has been deter mined with , respectively , the fan static 
pressure or fan pressure;  
(10) ‘electric input power ’ (Pe), in W, means  the electric input power at BEP, measured at 
main terminals of motor or, when a VSD is present, at VSD input current terminal ; 
(11) ‘power conversion cor rection’ (Cp), means  a correction factor for power conversion 
losses , as determined according to point 3 of Annex III ; 
(12) ‘part load compensation’ ( Cc) means a correction factor for part load, as determined 
according to  point 5 of Annex III;  
(13) ‘guard compensation’ ( Cguard) means a correction factor, as determined according to  
point 5 of Annex III, that may be applied when calculating fan efficiency where the 
fan is equipped with permanently fitted protective guards that cannot be removed 
without making  the fan inoperable;  
(14) ‘volume flow rate ’ (qv), in m³/s, means  the gas volume displaced per unit of time by 
the fan and is derived from the mass flow rate, typically with standard air with a 
density ρ at default 1.200 kg/m³;   
EN 2  EN (15) ‘total pressure’ ( ptot), in Pa, means  the pressure calculated from the absolute pressure 
and the dynamic pressure;  
(16) ‘absolute pressure’ ( p), in Pa, means  the pressure measured with respect to absolute 
zero pressure;  
(17) ‘dynamic pressure’ ( pd), in Pa, means  the pressure calculated from the ve locity and 
the density;  
(18) ‘fan dynamic pressure’ ( pfd), in Pa, means  the dynamic pressure of the fan, defined at 
the fan outlet with the average velocity;  
(19) ‘fan static pressure’ ( pfs), in Pa, means  the difference between the sta tic pressure at 
the fan outlet and the stagna tion pressure at the fan inlet or , when the compressibility 
phenomenon is not a factor , the difference between the static pressure at the fan 
outlet and the total pressure at the fan inlet . It is the omnidirectional force per unit 
surface are a exerted at the fan outlet and is typically assessed by measuring the 
stagna tion pressure in a (cylindrical) hole of appropriate geometry and dimensions, 
in duct wall or appropriate measurement instrument perpendicular to the direc tion of 
the gas flow ; 
(20) ‘fan pressure’ ( pf), in Pa, means  the difference between the stagna tion pressures at 
the fan outlet and the fan inlet or , when compressibility phenomenon is not a factor , 
the difference between the total pressures at the fan outlet and the fan inlet . It is the 
directional force per unit surface area exerted at the fan outlet and is typically 
assessed by measuring the stagnation pressure in a (cylindrical) hole of appropriate 
geometry dimensions facing the direction of the gas flow ; 
(21) ‘stagnation pressure’ ( psg), in Pa, means the pressure measured at a point in a flowing 
gas if it were brought to rest via a process where there is no transfer of heat or 
matter;  
(22) ‘efficiency grade’ means  a parameter in the calculation of the minimum energy 
efficiency of a fan of specific electric input power at its BEP (expressed as parameter 
‘N’ in the calculation of the fan energy efficiency);  
(23) ‘minimum fan efficiency’ ( ηmin) means  the fan efficiency to be achieved in order to 
meet the requirements, calculated as the outcome of the appropriate equation in 
Annex II, using the applicable integer N of the efficiency grade and the electric input 
power Pe of the fan expressed in kW at its BEP; 
(24) ‘jet-fan efficie ncy’ ηr(T) means  the fan gas power output derived from the measured 
thrust of a jet fan divided by the electric input power P e, multiplied with correction 
factors for power conversion C p, part load compensation C c and guard compensation 
Cguard, in accordan ce with point 5  of Annex III;  
(25) ‘specific speed’ ( σBEP) means  the ratio between volume flow rate  and fan pressure as 
dimensionless characteristic number determined at BEP, in accordance with point 7  
of Annex III;  
(26) ‘low noise fan’ means an axial fan with an electric input power of 10 kW or more 
with a maximum characteristic noise emission value L ≤32 dB(A);  
(27) ‘dual use fan’ means a fan designed for both ventilation under normal conditions and 
emergency use as set out i n Art icle 1(3), point  (b); 
(28) ‘reversible fan’ means a fan capable of reaching at least 80% of the nominal forward 
air flow in the reverse direction;   
EN 3  EN (29) ‘custom fan’ means a fan having a custom design for a specific client and/or contract 
with respect to one or more of the significant elements, and an operating point or 
range specified by the client /contract . These fans are only supplied to that 
client /contract . Details are not presented in catalogues, online media or general 
selection program mes. The performance  details are specific to the application and the 
client /contract;  
(30) ‘safety critical fan’ means a fan that has been designed, verified, certified and 
manufactured under the scope of either the Regulation (EU) No 305/2011  or 
Directive 2014/34 relating to equi pment and protective systems intended for use in 
potentially explosive atmospheres ; 
(31) ‘professional repairer’ means an operator or undertaking which provides services of 
repair and professional maintenance of fans;  
(32) ‘manufacturer -authorised professional repai rer’ means a professional repairer 
authorised by the manufacturer, importer or authorised representative to repair safety 
critical fans they place on the market.  
(33) ‘wearing parts (sacrificial elements)’ means  parts that are intentionally designed to 
wear to  meet the requirements of the intended use. For example, where a fan is used 
in a abrasive environment the fan can quickly become damaged by the abrasion. 
Some parts are designed as sacrificial elements to protect other critical areas and are 
designed to b e replaced more frequently;  
(34) ‘proprietary tool’ means  a tool that is not commonly available and is specifically 
designed for a function that cannot be safely and/or reliably achieved by a commonly 
available tool;  
(35) ‘inherent speed’ means the rotation speed of  the fan, when the fan is operated at 
nominal or rated supply conditions of the motor;  
(36) ‘guarantee’ means any undertaking by the manufacturer, importer or authorised 
representative to the consumer, to: (a) reimburse the price paid; or (b) replace, repair 
or handle fans in any way if they do not meet the specifications set out in the 
guarantee statement or in the relevant advertising .  
EN 4  EN ANNEX I I 
Ecodesign requirements for fans  
Fans shall comply with the ecodesign requirements set out in points 1 to 5  of this Annex , 
except for fans integrated into other products which are placed on the market within the first 
year after the date of  application  of this Regulation , and provided tho se fans meet the  
requirements of Annex I to Regulation (EU) No 327/2011, using the calculation methods in 
Annex II to that Regulation, and verified by market surveillance authorities in accordance 
with Annex III to that Regulation.  
However, until [ 10 years  from date of application ], spare part fans replacing fans placed on 
the market before [the date of application of this Regulation ] shall be  exempt from the 
requirements set out in points 1 to 5, provided that:  
(a) there is no replacement fan that is fit to be integrated into the product in question 
which is compliant with this Regulation , for example  because its size exceeds the 
available physical space;   
(b) they comply with the information requirements set out in, point 6.  
1. MINIMUM FAN EFFICIENC Y REQUIREMENTS  
With effect from [Two years after entry into force ], the following rules shall apply:  
1. Fans, except jet fans and cross flow fans, shall have a fan efficiency ( η) equal to or 
larger than the minimum fan efficiency ( ηmin), which is a function of the electric 
input power Pe (in kW) and minimum efficiency grade N following the equations:  
– for fans with Pe <10 kW: ηmin = 4.56 LN( Pe) – 10.5 + N [%] ; 
– for fans with Pe ≥10 kW: ηmin = 1.1 LN( Pe) – 2.6 + N [%] . 
2. Jet fans shall  have a fan efficiency ( ηr) equal to or larger than the minimum jet fan 
efficiency ( ηr,min), which is a function of the electric input power Pe (in kW) and 
minimum efficiency grade N following the equations:  
– for jet fans with P e ≥750 W and <10 kW: η r,min = 7.32 LN( Pe) – 21.4 + N [%] ; 
– for jet fans with Pe ≥10 kW: η r,min = 1.73 LN( Pe) – 8.2 + N [%] . 
3. Cross flow fans shall have a minimum total fan efficiency (B,D) of at least 0.21 
(21%) over the full power range.  
4. The fan efficiency shall be assessed in accordance with the measurement method in 
point 3 of An nex III.  
5. Except cross flow fans, the values of the minimum efficiency grade N are set out in 
Table 1 per fan type, efficiency category (static or total) and measurement category 
(A to E) as appropriate .  
EN 5  EN Table 1  
Minimum efficiency grades  
Fan type  Measurement 
category  Efficiency 
category 
(pressure)  Minimum efficiency grades ( N)  
(applicable from [2 years after entry 
into force ]) 
 
Axial fans  A, C  static  50 
B, D  total 64 
Forward  curved <5  
kW and backward 
inclined centrifugal 
fans A, C  static  52 
B, D  total 57 
Other centrifugal 
fans  A, C  static  64 
B, D  total 67 
Mixed flow fans  A, C  static  57+7∙(α −45)/25  
B, D  total 67 
Jet fans ≥750 W  E  50 
6. The calculation of the minimum efficiency grade N for mixed flow fans involves the 
fan flow angle α, in degrees rounded to the nearest integer, assessed in accordance 
with the measurement method in point 4 of Annex III ; 
7. For fans having the following characteristics, the values of the mi nimum efficiency 
grades N set out in Table 1 shall  be multiplied by the corresponding factor (s), as 
applicable:  
Fans characteristics  Factor value  
Dual use fans designed for both ventilation under normal 
conditions and emergency use as set out in Article 1,3(b)  0.9 
For reversible fans  0.85 
Low noise fans  0.9 
8. For centrifugal fans with specific speed σBEP <0.12, electric input power Pe <10 kW, 
measurement category B or D and efficiency category ‘total’ the minimum fan 
efficiency ( ηmin) is a function of σBEP as follows:  𝜂𝑚𝑖𝑛= 2.95 ∗ 𝜎BEP + 0.2. 
2. PRODUCT INFORMATION R EQUIREMENTS ON FANS  
1. With effect from [two years after entry into force] , the information on fans set out in 
points 2( a) to ( o) shall be visibly displayed on:  
(a) the technical data sheet or user manual supplied with the fan, unless an internet 
link or a QR code linking to th e free access website referred to in point (c) is 
supplied with the product ;  
EN 6  EN (b) the technical documentation for the purposes of conformity assessm ent 
pursuant to Article 4 ;  
(c) free access websites of the manufacturer of the fan, its authorised 
representative or the importer  for a period of at least 20 years after the placing 
on the market of the last unit of the model concerned . 
2. The following informat ion shall be displayed:  
(a) fan type : select one of the following types: axial fan, forward curved 
centrifugal fan, backward curved centrifugal fan, backward inclined centrifugal 
fan, centrifugal fan (in case of a centrifugal fan that is not a forward curved, 
backward curved or backward inclined centrifugal fan), cross flow fan, mixed 
flow fan, jet fan ; 
(b) fan efficiency ( η), either as a number rounded to the nearest third decimal, or as 
a percentage (with symbol ‘%’) rounded to the nearest decimal;  
(c) measurement ca tegory used to determine the fan efficiency (A -E); 
(d) efficiency category (static or total), except for jet fans;  
(e) efficiency grade N at BEP; 
(f) the electric input power Pe (in kW), volume flow rate  qv (in m³/h rounded to 
the nearest integer, or alternatively, wh en flow rate is ≥ 0.5 m3/s in m³/s 
rounded to the nearest  second decimal), and applicable pressure difference Δ p 
(in Pa, rounded to the nearest integer) at BEP; 
(g) DC voltage lower than 100 V , with answer ‘ yes’ or ‘ no’; 
(h) list of all the other significant elements supplied with the fan;  
(i) specific speed 𝜎BEP, only for centrifugal fans with specific speed σBEP <0.12, 
electric input power Pe < 10 kW, measurement category B or D and efficiency 
category ‘total’;  
(j) fan speed in revolutions per minute (rpm, rounded  to the nearest integer) at 
BEP; 
(k) the specific ratio, rounded to the nearest second decimal;  
(l) manufacturer’s name, registered trade name or registered trademark, and the 
address at which the manufacturer can be contacted;  
(m) the model identifier  and, where appr opriate,  other codes and marks sufficient 
for the product  to be unequivocally and easily identified;  
(n) information relevant for facilitating disassembly, recycling or disposal at end -
of-life;  
(o) information relevant to minimise impact on the environment and en sure 
optimal life expectancy as regards installation, use and maintenance of the fan . 
The information in the technical documentation shall be provided in the order as 
listed  in points (a) to (o). The exact wording used in the list does not need to be 
repeated. It may be displayed using graphs, figures or symbols rather than text.  
The information listed in points (a) to (o) does not need to be published on free 
access websites for custom fans if this information is included in the commercial 
offers prov ided to the clients.   
EN 7  EN 3. The information referred to in points 2(a), 2(b), 2(c) and 2(d)  and year of 
manufacture shall be durably marked on or near the rating plate of the fan.  
4. Manufacturers shall provide information in the manual of instruction on specific 
precautions to be taken when fans are assembled, installed or maintained, including 
cleaning.  
3. INFORMATION REQUIREME NTS ON PARTIAL LOAD OR AT SPECIFIED DUTY  
With effect from [Three years after entry into force ], the following requirements shall apply:  
1. For al l fans, except custom fans, jet fans  and fans with multiple speed motors:  
The partial -load operational performance of the fan shall be provided for fans, except 
custom fans , jet fans  and fans with multiple speed motors. This shall  be described by 
a minimu m of three performance curves at different speeds: one at the stated inherent 
speed, one at a lower speed of between 40  % and 50  % of the inherent speed, plus an 
additional one in the middle ( ±5 %) of  the other two. More than three curves can be 
provided , including at any speeds including ones lower than 40  %.  
Performance curves shall comprise a sufficient number of test points to permit the 
characteristic curve to be plotted over the normal operating range.  
The information on the curves can be in digital form such as selection software or 
online catalogue. However , the values of volume flow, pressure, electric power, fan 
rotation speed and efficiency shall be provided for the individual test points.  
This information shall be available on:  
(a) the technical dat a sheet or user manual supplied with the fan, unless an internet 
link or a QR code to that information is supplied with the product;  
(b) the technical documentation for the purposes of conformity assessment 
pursuant to Article 4 ; 
(c) the free access websites of th e manufacturer of the fan, its authorised 
representative or the importer.  
2. For custom fans:  
The performance or performance curve of custom fans at the specified operating 
point(s) or operating range(s) shall be provided. A performance curve shall comprise 
a sufficient number of test points to permit the characteristic curve to be plotted over 
the nor mal operating range. The values of volume flow, pressure, electric power and 
efficiency shall be provided for the individual test points.  
This information shall be available on:  
(a) the technical data sheet or user manual supplied with the fan, unless an inte rnet 
link or a QR code to that information is supplied with the product;  
(b) the technical documentation for the purposes of conformity assessment , 
pursuant to Article 4.  
3. For jet fans:  
The partial -load operational performance of the fan shall be provided for jet fans. For 
jet fans with a single speed motor there is no partial load operation, and no partial 
load information is required.   
EN 8  EN For jet fans without variable speed drives or not intended to be used with variable 
speed drives, but fitted with a multiple f ixed speed motor, the additional operating 
point is at the lower speed settings.  
For jet fans with a variable speed drive or intended to be used with a variable speed 
drive the additional data points shall be at 30% and 50% of the inherent speed.  
For each operating point, the published data shall  include thrust, electric input power, 
rotational speed and efficiency, as a minimum.   
4. For fans with multiple speed motors  except jet fans , the curves shall be provided for 
the motor’s inherent and minimum speed ava ilable to the customer in the same 
conditions as set out in points 1 and 2 depending on whether or not the fan is a 
custom fan.  
4. RESOURCE EFFICIENCY R EQUIREMENTS  
For fans that are specifically designed and marketed exclusively to be integrated in specific 
energy -related products covered by ecodesign requirements with respect to spare part 
availability, the specific provisions of the implementing regulation applicab le to the product 
in question shall apply, for the duration specified therein, in place of the requirements set out 
in this point.   
For custom fans for which spare part availability is addressed in the contract, and which are 
not covered by the previous paragraph , no specific requirements shall apply.  
For other fans, the following requirements shall apply  from  [two years after entry into force ]: 
1. Availability of spare parts:  
(a) For all models, units of which are placed on the market as from [date of 
application  of this Regulation] , manufacturers, importers or authorised 
representatives of fans, other than safety critical fans, shall make available to 
professional repairers at least the following spare parts, if part of the fan, as 
individual elements or integrat ed as originally supplied:  
(1) motors  of which the rated power is lower than 10 kW;  
(2) motor brushes;  
(3) impellers;  
(4) stator elements;  
(5) mechanical drive components;  
(6) variable speed drives;  
(7) sensors;  
(8) wearing parts (sacrificial elements);   
(9) joints and fixtures required to install these spare parts . 
(b) For all models, units of which are placed on the market as from  [date of 
application of this Regulation ], manufacturers, importers or authorised 
representatives of safety critical fans shall make  available to manufacturer -
authori sed professional repairers at least the following spare parts, if part of the 
fan, as individual elements or integrated as originally supplied:  
(1) motors , of which the rated power is lower than  10 kW;   
EN 9  EN (2) motor brushes;  
(3) impellers,  
(4) stator elements;  
(5) mechanical driv e components;  
(6) variable speed drives;  
(7) sensors;  
(8) wearing parts (sacrificial elements) ;  
(9) joints and fixtures required to install these spare parts . 
(c) Availability of spare parts referred to in point s (a) and ( b) shall be ensured for a 
minimum period starting at the latest [two years after date of  application of this 
Regulation ] or two years after the placing on the market of the first unit of the 
model, whichever is the later date, and ending at least 10 years a fter placing on 
the market the last unit of the model concerned. For that purpose, the list of 
spare parts, the procedure for ordering them and the repair instructions shall be 
publicly available on the free access website of the manufacturer, importer or 
authorised representative, at least during the same period and starting at the 
date referred to in this point. For safety critical fans, the free access website 
access may be restricted by username and password.  
(d) Maximum delivery time of spare parts:  
Durin g the period mentioned in point  (c), the manufacturer, importer or 
authorised representative shall ensure the delivery of the spare parts with the 
following timeframe:  
(1) as specified in a contract, where a contract exists between the 
manufacturer and the end  user of the fan;  
(2) if not, as specified  in the product information of the fan and made 
available on free access websites;   
(3) if not, then 8 weeks after having received the order . 
2. Access to repair and maintenance information:  
(a) During the period referred to in point 1(c) the manufacturer, importer or 
authorised representative shall provide access to the fan repair and maintenance 
information to professional repairers.  
The manufacturer’s, importer’s or authorised representative’s website shall 
indicate the process for professional repairers to request  access to information . 
In order  to accept such a request, the manufacturers, importers or authorised 
representatives may only require the professional repairer to demonstrate that : 
(1) the professional repairer has the technical competence to repair fans and 
complies with the applicable regulations for repairers of electrical 
equipment in the Member States where it operates. Reference to an 
official registration system as professional re pairer, where such system is 
in place  in the Member States concerned, shall be accepted as proof of 
compliance with this point;    
EN 10  EN (2) the professional repairer is covered by insurance covering liabilities 
resulting from its activity regardless of whether this is required by the 
Member State.  
(b) manufacturers, importers or authorised representatives shall accept or refuse 
the request referred to in point (a ) within 5 working days.  
(c) manufacturers, importers or authorised representatives may charge reasonable 
and propo rtionate fees for access to the repair and maintenance information or 
for receiving regular updates. A fee is reasonable if it does not discourage 
access by failing to take into account the extent to which the professional 
repairer uses the informati on. 
(d) once the request is accepted, a professional repairer shall have access to the 
requested repair and maintenance information within one working day.  The 
information may be provided for an equivalent model or model of the same 
family, where relevant . 
(e) The repai r and maintenance information shall include:  
(1) the unequivocal appliance identification;  
(2) a disassembly map or exploded view allowing to visualise at least the 
spare parts made available;  
(3) a technical manual of instructions for repair;  
(4) a list of necessary repa ir and test equipment;  
(5) component and diagnosis information (such as minimum and maximum 
theoretical values for measurements);  
(6) wiring and connection diagrams;  
(7) diagnostic fault and error codes (including manufacturer -specific codes, 
where applicable);  
(8) instructions for installation of relevant software and firmware including 
reset software;  
(9) information on how to access data records of reported failure incidents 
stored on the product (where applicable).  
3. Requirements for dismantling for material recovery and recycling while avoiding 
pollution:  
(a) manufacturers, importers or authorised representatives shall ensure that fans 
are designed in such a way that the materials and components referred to in 
Annex VII to Directive 2012/19/EU  of the European Parliament a nd of the 
Council1 can be removed with the use of commonly available tools .  
(b) manufacturers, importers and authorised representatives shall fulfil the 
obligations laid down in Article 15 (1) of Directive 2012/19/EU.  
(c) When m anufacturers, importers or authorise d representatives of fans make 
available software and firmware updates , these shall remain available for a 
                                                 
1 Directive 2012/19/EU of the European Parliament and of the Council of 4 July 2012 on waste electrical 
and electronic equipment (WEEE) (OJ L 197, 24.7.2012, p. 38).   
EN 11  EN minimum of 10 years after the placing of the last unit of a model on the market , 
and these software and firmware updates shall be provided free of ch arge.  
5. MATERIAL EFFICIENCY P RODUCT INFORMATION R EQUIREMENTS  
From [t wo years after date of entry into force ], user and installer instructions shall be 
provided in the form of a user manual on  free access websites of manufacturers, 
importers and authorised representatives , and  shall include the following 
information:  
(a) how to access professional repair  services (internet webpages, addresses, 
contact details) ; 
(b) relevant information for ordering spa re parts, directly from the manufacturer or 
through other channels;  
(c) the minimum period during which spare parts, necessary for the repair of the 
appliance, are available;  
(d) the minimum duration of the guarantee of the fan in years;  
(e) details of any proprietary  tool required for repair ; 
(f) instructions of correct installation;  
(g) instructions for maintenance;  
(h) identification of errors, the meaning of the errors and the action required, 
including identification of errors requiring professional assistance;   
(i) information on any implications of self -repair or non -professional repair for the 
safety of the user and for the guarantee . 
6. PRODUCT INFORMATION R EQUIREMENTS FOR SPAR E PART FANS  
From [two years after date of entry into force ], the packaging (or the product itself in t he 
absence of packaging), the technical data sheet or user manual supplied with the fan, and 
product information available online and in catalogues shall indicate in a clear and visible 
manner:  
“This fan does not meet the performance requirements of Regul ation (EU) [reference to this 
Regulation]  and can only be used to replace a corresponding existing fan placed on the 
market before [date of entry into application of this Regulation] and integrated into a 
product, to the extent that no compliant fan is fit  to be used as a replacement ”.  
The technical data sheet or user manual supplied with the spare part fan shall provide:  
(a) manufacturer’s name, registered trade name or registered trademark, and the 
address at which the manufacturer can be contacted;  
(b) the model identifier  and, where appropriate,  other codes and marks sufficient 
for the product  to be unequivocally and easily identified;  
(c) information relevant for facilitating disassembly, recycling or disposal at end -
of-life;  
(d) information relevant to minimise impact on the environment and ensure 
optimal life expectancy as regards installation, use and maintenance of the fan .  
EN 12  EN ANNEX III 
Measurements and calculations  
1. For the purposes of compliance and verification of compliance with the requirements 
of this Regulation, measurements and calculations shall be made using harmonised 
standards the reference numbers of which have been published for this purpose in the 
Offici al Journal of the European Union , or using other reliable, accurate and 
reproducible methods that take into account the generally recognised state -of-the-art 
methods. They shall meet the conditions and technical parameters set out in points 2 
to 5. 
In the absence of existing relevant standards and until the publication of the 
references of the relevant harmonised standards in the Official Journal, the 
transitional testing methods set out in Table 2 , or other reliable, accurate and 
reproducible methods, whic h take into account the generally recognised state -of-the-
art methods , shall be used.  
2. For the purpose of compliance testing  and provided that reliable, accurate and 
reproducible test - and calculation methods are used , the manufacturer:  
(a) may remove the eleme nts that are not significant e lements as defined in 
Article 2 , point  (2);  
(b) may conduct the tests with the geometrical equivalent of the stator inner 
surface;  
(c) may conduct the tests with a scale model and calculate the results for the 
real-size product if the latter has an impeller diameter above 1 m for jet 
fans or 0.5 m for other fans;  
(d) may conduct the tests at customer's or manufacturer's site if the latter has  
an impeller diameter above 1 m for jet fans or 0.5 m for other fans . 
The compliance of fans with multiple speed motors shall be determined at the power 
and speed corresponding to the highest speed made available to the customer.  
The compliance  of fans of which the blade pitch angle can be adjusted to fulfil the 
customer’s duty point shall be determined using the pitch configuration made 
available to the customer.  
3. Fan flow angle  
The fan flow angle α is calculated  as the average value of angles α 1 and α 2 following 
the formula:  
𝛼=𝛼1+ 𝛼2
2 
where:  
α1 is the angle of the tangent at the hub at the intersection of the blade trailing 
edge with the hub;  
α2 is the angle of the tangent at the shroud or at the outer diameter of the blade 
at the intersection of the bl ade trailing edge with the shroud or with the outer 
diameter of the blade, given that, if the hub and/or shroud are not 
axisymmetric, angles α 1 and α 2 are the average values in circumferential 
direction.   
EN 13  EN An impeller defined as ‘axial’ if α <20°, ‘mixed -flow’ if 20°≤ α <70° and ‘centrifugal’ if α 
≥70°.  
   
centrifugal  mixed -flow axial  
Where:  
A = rotation axis ; B = inflow ; C = leading edge ; D = blade ; E = trailing edge ; F = outflow  
 
E 
C 
B 
A D F 
 
4. Centrifugal blade angle  
‘Centrifugal blade angle β 2 means the angle between the tangent to the outer 
circumference of the outer circle, as defined by the trailing edge of the blades, and a 
line bis ecting the trailing edge of the blade. To consider blade designs that have a 
rapid change of angle at the trailing edge, the angle is the arithmetic mean along 50% 
of the trailing length of the blade. The trailing edge of the blade is the edge at the tip 
of the blade at the outlet of the impeller. A centrifugal impeller is defined as 
‘backward curved’ if 0°< β 2 ≤50°, ‘backward inclined’ if 50°< β 2 ≤90° and ‘forward -
curved’ if β 2 >90°.  
   
Backward curved  Backward inclined  Forward curved  
 
β20-50° β250-90° β2>90°
Backward curved Backward inclined Forward curved
β20-50° β250-90° β2>90°
Backward curved Backward inclined Forward curved
β20-50° β250-90° β2>90°
Backward curved Backward inclined Forward curved
 
5. Fan efficiency  
5.1. Fans, other than jet fans  
The fan efficiency is calculat ed as follows:  
η = Cp ∙ Cc ∙ Cguard ∙ P u / Pe 
where :  
EN 14  EN Cp is a correction  factor for power conversion losses with a value of 0.9 for 
fans equipped with a DC motor with a rated voltage lower than 100 V when the 
converter transforming AC into DC is not part of the fan , and 1.0 otherwise;  
Cc is a correction factor  for part load compensation with one of the following 
values:  
Cc = 1 for a fan without a variable speed drive;  
Cc = 1.04 for a fan with a variable speed drive and Pe ≥5 kW and where this 
variabl e speed drive is included in the fan conformity assessment;  
Cc = 1 + 0.0812 ( Pe )-0.5 for a fan with a variable speed drive and Pe <5 kW and 
where this variable speed drive is included in the fan conformity assessment;  
Cguard is a correction factor  for guard compensation  that may be applied when 
calculating fan efficiency in case the fan is equipped by permanently fitted 
protective guards that cannot be removed without making the fan inoperable. 
The value of C guard is: 
– 1 for a fan without a protecti ve guard, with removable protective 
guard, or a protective guard with opening e > 30  mm; 
– 1.02 for a fan equipped with a protective guard with opening 20 < e 
≤ 30 mm; 
– 1.06 for a fan equipped with a protective guard with 10 < e ≤ 20  
mm; 
– 1.09 for a fan equipp ed with a protective guard with opening 8 < e 
≤ 10 mm; 
– 1.15 f or a fan equipped with a protective guard with opening e ≤ 8  
mm,  
where ‘e’ is the dimension of the opening, corresponding to the side of a 
square opening, the diameter of a round opening and the  narrowest 
dimension of a slot opening, as defined in section 4.2.4.1 of standard EN 
ISO 13857:2019 ; 
Pu, in W, is the product of the volume flow rate  qv, in m³/s, and the pressure 
difference between fan in - and outlet Δ p, in Pa, both determined at BEP, 
following the expression:  
Pu = q v ∙ Δp, 
were  qv, in m³/s, is the gas volume displaced per unit of time by the fan and is 
derived from the mass flow rate, typically with standard air with a density ρ at 
default 1.200 kg/m³;  
Pe, in W, is the electric input p ower at BEP, measured at main terminals of 
motor or, when present, variable speed drive . 
5.2. Jet-fans 
The jet -fan efficiency  ηr(T) is calculated as:  
𝜂𝑟(𝑇)=𝐶p∙𝐶c∙𝐶guard ∙𝑞𝑣(𝑇)∙ Δp(T)
𝑃𝑒=𝐶𝑝∙𝐶𝑐∙𝐶𝑔𝑢𝑎𝑟𝑑 ∙0.5 √𝑇𝑚
𝜌∙𝐴2 ∙𝑇𝑚
𝑃𝑒  
EN 15  EN where:  
qv(T) is volume flow rate  at thrust T, in m³/s;  
Δp(T) is pressure difference at thrust T, in Pa;  
Pe electric input power  supplied to the fan, in W;  
ρ is the standard air density ( 1.2 kg/m³);  
A2 is the gross fan outlet area in m²;  
Tm is fan thrust measured, in N, assessed according to measurement category E.  
Cp, Cc and Cguard are correction factor s as outlined in section 5.1 above.   
6. Characteristic noise emission value L 
The characteristic noise emission value C, in dB(A) is defined as  
L = PWL impeller  −30 log u tip – 10 log ( 0.001∙qv ∙ pfs) + 5 log Dimpeller  
where :  
PWL impeller is impeller sound power level, in dB(A);  
u tip is impeller tip speed, in m/s;  
qv is volume flow rate , in m³/s;  
pfs is fan static pressure, in Pa;  
Dimpeller  is impeller diameter, in m . 
7. Specif ic speed σBEP 
The specific speed σBEP of centrifugal  fans with electric input power Pe <10 kW, 
measurement category B or D and efficiency category ‘total’ is defined as : 
𝜎𝐵𝐸𝑃 =𝑛∙2∙√𝜋∙𝑞𝑣,𝐵𝐸𝑃
(2∙𝑝𝑓,𝐵𝐸𝑃
𝜌)0.752∙√𝜋∙𝑞𝑣,𝐵𝐸𝑃
(2∙𝑝𝑓,𝐵𝐸𝑃
𝜌)0.75 
where :  
σBEP is specific speed;  
n is fan speed in revolutions per second (rps);  
ρ is air density 1.2 kg/m³;  
qv,BEP is volume flow rate  at BEP, in m³/s;  
pf,BEP is fan pressure at BEP, in Pa;   
π is the number pi ( 3.14…).  
Table 2   
References and qualifying notes for fans  
(The source of all references is CEN unless otherwise indicated)  
Parameter  Reference/ Title  Notes and short description  
 
 FprEN 17166:2020 Fans – 
Procedures and methods to   
EN 16  EN determine the energy 
efficiency for the electric 
input power range of 125 W 
up to 500 kW  
Measurement 
category  § 4.3 Identification of an 
appropriate measurement 
category.  The measurement category means a 
test, measurement or usage 
arrangement that defines the inlet 
and outlet conditions of the fan 
under test, used to determine the 
energy efficiency. Categories 
included are numbered A through 
E, according to EN ISO 
13349:2010 and EN ISO 5801:2017 
§ 6.2, 6.3, 6.4, 6.5 (categories A 
though D) and EN ISO 13350:2015 
(category E – jet fans).  
Efficiency category  § 3.15.1  and § 3.15.3 
Definitions of fan pressure and 
fan static pressure.  The fan gas output energy form 
used to determine the fan energy 
efficiency, defined by fan pressure 
or fan static pressure.  
 
Efficiency grade  § 6.1 and § 6.2 Method of 
comparison between 
efficiency grades.  
 Parameter in the calculation of the 
minimum fan energy efficiency is 
denoted in this Regulation as ‘ N’. 
In FprEN 17166:2020 the minimum 
required efficiency grade is denoted 
Ng. 
Fan efficiency  § 5.5.2.5 Testing of jet fans  
 
 
 
§ 5.5.2.2 to 5.5.2.4  
 
 
 
 
 
 
 
 
 
 
 
§ 5.6 Calculation method for 
not final assembly.  Jet fan overall efficiency is 
calculated following EN ISO 
13350:2015.  
 
For all other fan types in 
accordance with the provisions of 
EN ISO 5801:2017.  
Where scaling is necessary it shall 
be carried out in accordance with 
the requirements of ISO 
13348:2007 subclause 7.1.6.  
Full-size testing on -site shall  be 
carried out in accordance with the 
test and calculation methods in EN 
ISO 5802:2008/A1:2015.  
 
Denoted  η in this Regu lation. 
Reference efficiency ( ηref) in the 
standard is defined as the fan 
efficiency value which is used to  
EN 17  EN verify compliance, being either the 
fan overall efficiency referred to 
the drive input power, ( ηed), or the 
fan overall efficiency referred to 
the m otor input power ( ηe), 
depending on whether a VSD is 
used or not.  
Volume flow rate  qv § 3.18 Volume flow rate  Volume flow rate qv1 is the mass 
flow rate divided by the density at 
fan inlet: qv1 = qm / ρ1.  
EN ISO 5801:2017 § 11.2 and 
Annex A for mass flow  rate 
measurement and calculation, 
whereby the volume flow rate can 
be calculated according to § 15.1.8.  
Specific speed 𝜎BEP § 3.15.1  The ratio between flow rate and fan 
pressure as dimensionless 
characteristic number determined at 
BEP, which can be calculated 
according to Annex III, 7. The 
needed fan pressure can be 
calculated according to FprEN 
17166:2020 § 3.15.1.  
 EN ISO 5801:2017 Fans – 
Performance testing using 
standardi sed airways   
Pressure difference Δ p 
(in Pa) at BEP § 12.8.9 Method of 
measurement  Describes how to measure pressure 
difference between fan in let and 
outlet, which following the 
Regulation has to be measured at 
BEP. 
Fan speed (rpm)  § 7.2 and § 12.3 Rotational 
speed   
Specific ratio  § 15.1.6 Fan pressure  The stagnation pressure measured 
at the fan outlet divided by the 
stagnation pressure at the fan inlet 
at nominal flow rate.  
The specific ratio can be calculated 
from EN ISO 5801:2017 § 3.35 
where it is defined as fan pressure 
ratio (r), where r = psg2 / psg1. 
 IEC/ EN 60034 -2-1:2014 
Rotating electrical machines - 
Part 2 -1: Standard methods 
for determining losses and   
EN 18  EN  efficiency from tests 
(excluding machines for 
traction vehicles)  
Electric input power 
Pe (in kW)  § 6.1.2 Direct measurement of 
input ( P1) and output ( P2) The electric input power at BEP, 
measured at main terminals of 
motor or, when present, variable 
speed drive. EN IEC/ 60034 -2-
1:2014 for the electric input power 
of electric motors fed directly from 
the grid, EN IEC 61800 -9-2:2017 
for the electric input of e lectric 
motors combined with and fed by a 
CDM).  
 EN 45550 – 45559 series on 
Energy -related products - 
Material efficiency aspects 
for Ecodesign   
Disassembly, 
recycling or disposal 
at end -of-life EN 45553:2020  
EN 45555:2019  
 
EN 45558:2019  
 
EN 45559:2019  Disassembly aspects.  
Assessing the recyclability and 
recoverability of an energy related 
product.  
Critical raw material (CRM) 
content.  
Methods for providing information 
relating to material efficiency.   
EN 19  EN ANNEX IV  
Verification procedure for market surveillance purposes  
1. The verification tolerances defined in this Annex relate only to the verification by 
Member State authorities of the declared values and shall not be used by the 
manufacturer, importer or authorised representative  as an allowed tolerance to 
establish the values in the technical documentation or in interpreting these values 
with a view to achieving compliance or to communicate better performance by any 
means.  
2. Where a model has been designed to be able to detect it i s being tested (e.g. by 
recognising the test conditions or test cycle), and to react specifically by 
automatically altering its performance during the test with the objective of reaching a 
more favourable level for any of the parameters specified in this R egulation or 
included in the technical documentation or included in any of the documentation 
provided, the model and all equivalent models shall be considered no n-compliant.  
3. As part of verifying the compliance of a product model with the requirements laid 
down in this Regulation pursuant to Article 3(2) of Directive 2009/125/EC, the 
authorities of the Member States shall apply the following procedure:  
(a) the Member State authorities shall verify one single unit of the model;  
(b) the model and all equivalent models  shall be considered to comply with the 
requirements set out in this Regulation if all the following conditions are 
fulfilled:  
(i) the declared  values given in the technical documentation pursuant 
to point 2 of Annex IV to Directive 2009/125/EC and , where 
applicable , the values used to calculate these values , are not more 
favourable for the manufacturer, importer or authorised 
representative than the results of the corresponding measurements 
carried out pursuant to point 2(g) of  that Annex ; 
(ii) the declare d values meet any requirements laid down in this 
Regulation and any required product information published by the 
manufacturer, importer or authorised representative does not 
contain values that are more favourable for the manufacturer, 
importer or authori sed representative than the declared values;  
(iii) when the Member State authorities check the unit of the model, it 
complies with the product information requirements in points 2, 3, 
5 and 6 and resource efficiency requirements in point 4 of Annex 
II, as  applicable;  
(iv) when the Member State authorities test the unit of the model, the 
determined values (the values of the relevant parameters as 
measured in testing and the values calculated from these 
measurements), comply with the respective verification  tolerances 
set out  in Table 3 . 
4. Where the results referred to in points 3(b), (i), (ii)  and (iii) are not achieved, the 
model and all equivalent models shall be considered not to comply with this 
Regulation.  
5. Where the result referred to in point 3(b)( iv) is not achieved:   
EN 20  EN (a) for models that are produced in quantities of less than five per year including 
equivalent models, the model and all equivalent models shall be considered not 
to comply with this Regulation;  
(b) for models that are produced in quantities of fi ve or more per year including 
equivalent models, the Member State authorities shall select three additional 
units of the same model for testing. As an alternative, the three additional units 
selected may be one or more of equivalent models.  
6. The model shall  be considered to comply with the applicable requirements if, for the 
three units referred to in point 5(b), the arithmetical mean of the determined values, 
complies with the respective verification tolerances set out in Table 3 . 
7. Where the result referred to in point 5 is not achieved, the model and all equivalent 
models shall be considered not in compliance with this Regulation.  
8. The Member State authorities shall , without delay , provide all relevant information 
to the authorities of the other Member States  and to the Commission  through the 
information and communication referred to in Article 34 of Regulation (EU) 
2019/1020  of the European Parliament and of the Council2 after a decision is taken 
on the non -compliance of the model according to points 2, 4 or 7.  
9. The Member State authorities shall use the measurement and calculation methods set 
out in Annex III.  
10. The performance curves referred to in point 3  of Annex I shall  be verified by 
checking a minimum of two declared test points for each of the characteristic curves.  
11. Given the weight and size limitations for the transportation of fans with electric input 
power of 250 to 500 kW , Member State authorities may decide to un dertake the 
verification procedure at the premises of manufacturers, authorised representatives or 
importers before the products are put into service. The Member State authority can 
do this verification using its own testing equipment.  
12. If factory acceptanc e tests are planned for such fans, which will test parameters laid 
down in Annex II of this Regulation, the Member State authorities may decide to use 
witnessed testing during these factory acceptance tests to gather test results which 
can be used to verif y compliance of the fan under investigation. The authorities may 
request a manufacturer, authorised representative or importer to disclose information 
on any planned factory acceptance tests relevant for witnessed testing.  
13. In the cases mentioned in points  11 and 12 , the Member State authorities only need 
to verify one single unit of the model. If the result referred to in point 3(b)(v) is not 
achieved, the model and all equivalent models shall be considered not to comply 
with this Regulation.  
14. When testing fans at part load, the Member State authorities shall use a variable 
speed drive without filters, with a view to minimising VSD energy losses.  
15. The Member State authorities shall only apply the verification tolerances set out in 
Table 3  and shall only use t he procedure described in this Annex  for the 
requirements referred to in this Annex. For the parameters in Table 3 , no other 
                                                 
2 Regulation (EU) 2019/1020 of the European Parliament and of the Council of 20 June 2019 on market 
surveillance and compliance of products and amending Directive 2004/42/EC and Regulations (EC) No 
765/2008 and (EU) No 305/2011 (OJ L 169, 25.6.2019, p. 1).   
EN 21  EN tolerances such as those set out in harmonised standards or in any other measurement 
method shall be applied.  
Table 3  — Verificatio n tolerances  
Parameters  Verification tolerances  
Fan efficiency ( η) The determined value * shall not be lower 
than the value representing 93 % of the 
corresponding declared value  at BEP, and not 
be lower than the value representing 85 % of 
the corresponding declared value  at partial 
load.  
Electric input power ( Pe) The determined value* shall not be higher 
than the value representing 107 % of the 
corresponding declared value at BEP, and not 
be higher than the value representing 110 % 
of the corresponding declared value at partial 
load.  
Volume flow rate ( qv) The determined value* shall not differ by 
more than 5% from the corresponding 
declared value at BEP, and not more than 
10% than the corresponding declared value at 
partial load.  
Pressure  difference (Δp) The determined value* shall not differ by 
more than 5% from the corresponding 
declared value at BEP, and not more than 
10% than the corresponding declared value at 
partial load.  
* Where three additional units are tested in accordance with  point 5 (b), the determined value 
means the arithmetical mean of the values determined for those three additional units.   
EN 22  EN ANNEX V  
Indicative benchmarks  
The maximum values relate to the achievable efficiency grade N (minimum efficiency 
formulas are set out in Annex II) with clean air and no space and/or noise restrictions. The 
minimum values apply to contaminated air (some dust load) and space, noise and/or other 
operational restrictions at the limit of what is still  in scope according to the exemptions in 
Article 1.  
Table 4 
Indicative benchmarks for fans  
Fan type  Measurement 
category  Pressure  N  
minimum  N  
maximum  
Axial  fans A, C  static  50 75 
B, D  total 64 85 
Forward curved <5 
kW and backward 
inclined  fans A, C  static  52 65 
B, D  total 57 70 
Forward curved ≥5 
kW, backward  curved  
fans A, C  static  64 80 
B, D  total 67 85 
Mixed flow  fans A, C  static  57+7∙(α −45)/25  77 
B, D  total 67 85 
Jet fans  E  60  
Cross flow  fans: 21% efficiency.