kSIST FprEN 17166:2019

SLOVENSKI STANDARD
oSIST prEN 17166:2017
01-november-2017
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Fans - Procedures and methods to determine the energy efficiency for the electrical input
power range of 125 W up to 500 kW
Ventilatoren - Verfahren und Methoden zur Ermittlung der Energieeffizienz für die
elektrische Eingangsleistung im Bereich von 125 W bis 500 kW
Ventilateurs - Procédures et méthodes pour déterminer et évaluer l`efficacité énergétique
pour la gamme de puissance d`entrée électrique de 125 W jusqu´à 500 kW
Ta slovenski standard je istoveten z: prEN 17166
ICS:
23.120 =UDþQLNL9HWUQLNL.OLPDWVNH Ventilators. Fans. Air-
QDSUDYH conditioners
oSIST prEN 17166:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17166:2017


DRAFT
EUROPEAN STANDARD
prEN 17166
NORME EUROPÉENNE

EUROPÄISCHE NORM

September 2017
ICS 23.120
English Version

Fans - Procedures and methods to determine the energy
efficiency for the electrical input power range of 125 W up
to 500 kW
Ventilateurs - Procédures et méthodes pour Ventilatoren - Verfahren und Methoden zur Ermittlung
déterminer et évaluer l`efficacité énergétique pour la der Energieeffizienz für die elektrische
gamme de puissance d`entrée électrique de 125 W Eingangsleistung im Bereich von 125 W bis 500 kW
jusqu´à 500 kW
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 156.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17166:2017 E
worldwide for CEN national Members.

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Contents Page
European foreword . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Requirements . 24
4.1 General . 24
4.2 Identify the fan type . 24
4.3 Identify an appropriate measurement category (see EN 13349) . 25
4.4 Identify the test and calculation methods from the following standards appropriate
to the fan type . 25
5 Testing and calculation methods . 25
5.1 General . 25
5.2 Test method . 25
5.3 Significant elements of the fan (boundary conditions) . 26
5.3.1 Significant elements .26
5.3.2 Boundary .28
5.3.3 Examples of fan arrangements.28
5.4 Requirement for testing final assembly fans . 34
5.5 Test method including scaling final assembly and impellers . 34
5.5.1 General .34
5.5.2 Choice of testing or calculation method .34
5.6 Calculation method not final assembly54.6 . 36
5.6.1 General .36
5.6.2 Not final assembly calculation.36
5.7 Test information . 39
5.7.1 General .39

5.7.2 Fan performance information .40
5.7.3 Jet fan performance information .40
5.8 Information declaration . 41
5.8.1 General .41
5.8.2 Final assembly fans .41
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5.8.3 Not final assembly fans .41
5.8.4 Jet fans .41
6 Evaluation of conformity . 41
6.1 Introduction. 41
6.2 Method of comparison between efficiency grades . 42
6.3 Method of comparison between efficiency values . 42
6.4 Method of comparison between efficiency values, including market surveillance
tolerance . 42
7 Classification and designation . 43
8 Classification and designation . 43
8.1 General . 43
8.2 Marking . 43
8.3 Product information requirements on fans . 43
9 Installation and maintenance information . 44
Annex A (informative) Explanatory notes on fans integrated in other energy related products . 45
A.1 Integrated fans. 45
A.1.1 Explanation . 45
A.1.2 Requirements . 45
A.2 Identify the significant elements of the fan . 45
A.2.1 The significant elements . 45
A.2.2 The boundary . 45
A.3 Facsimile of the fan . 47
Annex B (informative) Toxic, highly corrosive, flammable, abrasive substances . 48
B.1 Arduous environments . 48
B.2 Toxic . 48
B.3 Highly corrosive . 48
B.4 Flammable . 48
B.5 Abrasive . 49
Annex C (informative) Guide to using the standard . 50
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Annex D (informative) Significant elements . 53
D.1 Significant elements of a fan . 53
Annex E (informative) Suggested format for compliance certification reports requested by market
surveillance authorities . 54
Annex ZA (informative) Relationship between this European Standard and the ecodesign
requirements of Commission Regulation (EU) No 327/2011 aimed to be covered . 57
Bibliography . 59
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European foreword
This document (prEN 17166:2017) has been prepared by Technical Committee CEN/TC 156 “Ventilation
for buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
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1 Scope
This harmonized European Standard provides procedures and methods for measuring and/or calculating
the energy efficiency and associated characteristics of fans when driven by electric motors.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN ISO 5801:2017, Fans — Performance testing using standardized airways (ISO 5801:2017)
EN ISO 5802, Industrial fans — Performance testing in situ (ISO 5802)
EN ISO 12759:2015, Fans — Efficiency classification for fans (ISO 12759:2010 + A1:2013)
EN ISO 13349:2010, Fans — Vocabulary and definitions of categories (ISO 13349:2010)
EN ISO 13350, Fans - Performance testing of jet fans (ISO 13350)
ISO 13348, Industrial fans — Tolerances, methods of conversion and technical data presentation
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
fan
rotary-bladed machine that receives mechanical energy and utilizes it by means of one or more impellers
fitted with blades to maintain a continuous flow of air or other gas passing through it and whose work per
unit mass does not normally exceed 25 kJ/kg
[SOURCE: EN ISO 13349:2010, definition 3.1.1]
3.2
fans driven by motors
fan driven by an electrical motor (included all transmissions and drives)
Note 1 to entry: One or more impellers fitted to or connected to a motor, with or without a drive mechanism, a
housing and a means of variable speed drive.
Note 2 to entry: See Figure 10.
Note 3 to entry: Adapted from ISO 13349:2010, definition 3.1.3.
[SOURCE: EN ISO 12759:2015, definition 3.1.5]
3.3
impeller
rotating part of the fan that is imparting energy into the gas flow and is also known as the fan wheel
3.4
fan type
fan of specific and typical design primarily distinguished by the geometry of its impeller and the gas path
through the fan
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3.4.1
axial, mixed flow and centrifugal fan
fan types are identified by the angles α and α (see figures)
1 2
Note 1 to entry: The angle α is the angle of the tangent at the hub at the intersection of the blade trailing edge with
1
the hub. The angle α is the angle of the tangent at the shroud or at the outer diameter of the blade at the intersection
2
of the blade trailing edge with the shroud or with the outer diameter of the blade. The fan types are defined as in
Table 1:
Table 1 — Fan type defined by the relationship of the blade and the shroud/hub
Fan type a
Angle α
Axial fan α < 20°
Mixed flow fan 20° ≤ α < 70°
Centrifugal fan 70° ≤ α
a
Where α = (α + α )/2.
1 2
Note 2 to entry: Centrifugal fans contain the types „centrifugal radial bladed fan“ (including radial tip), „centrifugal
forward curved fan“ and „centrifugal backward curved fan“ (including also backward inclined and backward curved
aerofoil bladed fans).
Note 3 to entry: If the hub and/or shroud are not axisymmetric, angles α and α are the mean values in
1 2
circumferential direction.

Figure 1 — Differentiation by angles
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3.4.2
axial fan
axial-flow fan in which the air enters and leaves the impeller along essentially cylindrical surfaces coaxial
with the fan
[SOURCE: EN ISO 13349:2010, definition 3.1.1]
3.4.3
mixed-flow fan
fan in which the fluid path through the impeller is intermediate between the centrifugal and axial-flow
types
Note 1 to entry: See to 3.4.1.
[SOURCE: EC 327/2011, definition 15]
3.4.4
centrifugal fan
fan in which the air enters the impeller with an essentially axial direction and leaves it in a direction
perpendicular, or near perpendicular to this axis (see Table 1 and Figure 1)
Note 1 to entry: For further details see 3.5.
3.4.5
cross flow fan (tangential fan)
fan in which the fluid path through the impeller is in a direction essentially at right angles to its axis both
entering and leaving the impeller at its periphery
[SOURCE: EN ISO 13349:2010, definition 3.6.4]

Figure 2 — Cross flow fan
3.4.6
jet fan (impulse fan)
fan used for producing a jet of air in a space and unconnected to any ducting
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Note 1 to entry: The air jet can be used, for example, for adding momentum to the air within a tunnel or other space
(e.g. enclosed car park), or for intensifying the heat transfer in a determined zone.

Figure 3 — Jet fan

Figure 4 — Centrifugal jet fan
3.5
Detailed specification of centrifugal fan types
3.5.1
centrifugal forward curved fan
centrifugal fan with curved blades, where the outward direction of the blades at the periphery is forward
relative to the direction of rotation
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Figure 5 — Centrifugal forward curved fan
3.5.2
centrifugal backward curved fan
centrifugal fan with curved blades, where the outward direction of the blades at the periphery is backward
relative to the direction of rotation

Figure 6 — Centrifugal backward curved fan
3.5.3
centrifugal backward inclined fans
centrifugal fan with flat blades, where the outward direction of the blades at the periphery is backward
relative to the direction of rotation
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Figure 7 — Centrifugal backward inclined fan
3.5.4
centrifugal backward aerofoil fan
centrifugal fan with aerofoil blades (where the thickness of the blade is not constant throughout its
length), where the outward direction of the blades at the periphery is backward relative to the direction of
rotation

Figure 8 — Centrifugal backward aerofoil fan
3.5.5
centrifugal radial tip fan
centrifugal fan with flat or curved blades, where the outward direction of the blades at the periphery is
radial
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Figure 9 — Centrifugal radial tip fan
3.6
housing
stationary part which interacts with the air stream passing through the impeller
Note 1 to entry: A housing could be a device around the impeller which guides the gas steam towards, through and
from the impeller.
Note 2 to entry: A housing may have additional parts included within the housing or attached to the housing to affect
the performance of the fan. Such as:
— inlet bell, also known as venturi inlet, inlet cone, inlet radius;
— inlet guide vane;
— outlet guide vane;
— outlet diffuser.
Note 3 to entry: Additional parts are devices not listed above that provide an impact of the air power of the fan.
Note 4 to entry: Housing also called stator.
3.6.1
orifice ring
ring with an opening in which the fan sits and which allows the fan to be fixed to other structures
3.6.2
inlet guide vanes
vanes positioned before the impeller to guide the gas stream towards the impeller and which may or may
not be adjustable
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3.6.3
outlet guide vanes
vanes positioned after the impeller to guide the gas stream from the impeller and which may or may not
be adjustable
3.6.4
orifice panel
panel with an opening in which the fan sits and which allows the fan to be fixed to other structures
3.6.5
diffuser
device that improves the fan performance thorough static recovery
3.6.6
inlet cone (also known as venturi inlet, inlet bell, inlet radius)
device that steers the air into the housing and reduces the vena contracta and turbulence that would occur
at a sharp edge of the housing
3.6.7
fan without housing
fan designed not to rely upon a housing for its correct operation
3.6.8
fan with housing
fan designed to rely upon a housing for its correct operation
3.7
specific ratio
stagnation pressure measured at the fan outlet divided by the stagnation pressure at the fan inlet at the
optimal energy efficiency point of the fan; also known as compression ratio
[SOURCE: Regulation EC 327/2011, definition 18]
3.8
measurement category
fan test configuration according to the arrangement of standardised test airways; also known as
installation category according to EN ISO 5801 and EN ISO 13349
3.8.1
measurement category A
test configuration composed of the fan under test without any inlet or outlet duct fitted, optionally tested
with the ancillaries supplied with the fan, i.e. protection grid, inlet bell, etc.
Note 1 to entry: Also known as test configuration category A (see EN ISO 5801:2017, 6.2).
3.8.2
measurement category B
test configuration composed of the fan under test with an outlet duct fitted, simulating ducted conditions,
optionally tested with the ancillaries supplied with the fan
Note 1 to entry: Also known as test configuration category B (see EN ISO 5801:2017, 6.3).
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3.8.3
measurement category C
test configuration composed of the fan under test with an inlet duct fitted, simulating ducted conditions,
optionally tested with the ancillaries supplied with the fan
Note 1 to entry: Also known as test configuration category C (see EN ISO 5801:2017, 6.4).
3.8.4
measurement category D
test configuration composed of the fan under test with an inlet and an outlet duct fitted, simulating ducted
conditions, optionally tested with the ancillaries supplied with the fan
Note 1 to entry: Also known as test configuration category D (see EN ISO 5801:2017, 6.5).
3.8.5
measurement category E
test configuration with free inlet and free outlet without a partition
Note 1 to entry: Also known as test configuration category E.
[SOURCE: EN ISO 13349:2010, definition 3.4.5]
Note 2 to entry: It is defined in EN ISO 5801 but is not relevant to this standard.
Note 3 to entry: For jet fans there is no relationship between measurement category E and EN ISO 13350 (Jet fan
standard) in determining products efficiencies.
Note 4 to entry: In this measurement category a fan cannot produce any static pressure rise.
3.9
Power

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Figure 10 — Power diagram of drive system
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3.9.1
fan gas power
identical to the fan air power (installations B and D) or the fan static air power (installations A and C)
3.9.2
fan air power
P
u
also known as fan total air power; conventional output power which is the product of the mass flow rate
and the fan work per unit mass, or the product of the inlet volume flow rate, the compressibility coefficient
and the fan pressure
q × p × kp
f
[SOURCE: EN ISO 12759:2015, 3.3.12]
3.9.3
fan static air power
P

us
conventional output power which is the product of the mass flow rate and the fan static work per unit
mass, or the product of the inlet volume flow rate, the compressibility coefficient and the fan static
pressure
q × p × kp
sf
[SOURCE: EN ISO 12759:2015, 3.3.13]
3.9.4
impeller power
P

r
mechanical power supplied to the fan impeller
[SOURCE: EN ISO 12759:2015, 3.3.14]
3.9.5
fan shaft power
P

a
mechanical power supplied to the fan shaft [SOURCE: EN ISO 12759:2015, 3.3.16]
Note 1 to entry: Fan shaft power includes bearing losses, while fan impeller power does not.
Note 2 to entry: When the impeller is directly supported on the motor shaft the fan shaft power and the fan impeller
power are the same.
3.9.6
motor output power
P

o
shaft power output of the electric motor
3.9.7
motor input power
P
e
electrical input power supplied at the terminals of an electric motor drive without a variable speed drive
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3.9.8
drive control electrical input power
P

ed
electrical input power measured at the input terminals to the variable speed drive of a motor
3.10
efficiency
is the ratio between air power and a known input power
3.10.1
efficiency category
means the fan gas output energy form used to determine the fan energy efficiency, either static efficiency
or total efficiency where:
a) 'fan static pressure' (Psf) has been used to determine fan gas power in the efficiency equation for fan
static efficiency, and
b) 'fan total pressure' (Pf) has been used to determine fan gas power in the efficiency equation for total
efficiency
[SOURCE: Regulation EC 327/2011, Annex I, definition (6)]
3.10.1.1
total efficiency
ηt
means the energy efficiency of a fan, based upon measurement of the ‘fan total pressure’ (pf)
[SOURCE: Regulation EC 327/2011, Annex I, definition (12)]
Note 1 to entry: There are several total efficiencies depending on the power selected as an input, all of them using
fan air power as the measure of the output power (see 3.10.2 and Table 2).
3.10.1.2
static efficiency
η

s
means the energy efficiency of a fan, based upon measurement of the ‘fan static pressure’ (psf)
[SOURCE: Regulation EC 327/2011, Annex I, definition (7)]
Note 1 to entry: There are several static efficiencies depending on the power selected as an input, all of them using
fan air power as the measure of the output power (see 3.10.2 and Table 2).
3.10.2
efficiency definitions depending on input power
efficiency depends on which power is chosen as the input power
3.10.2.1
fan impeller efficiency
η

r
fan air power divided by the impeller power
[SOURCE: EN ISO 12759:2015, definition 3.4.1]
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3.10.2.2
fan shaft efficiency
η

a
fan air power divided by the fan shaft power
[SOURCE: EN ISO 12759:2015, definition 3.4.2]
Note 1 to entry: Shaft power, Pa, includes bearing losses, while impeller power, Pr, does not.
3.10.2.3
overall efficiency for a fan without variable speed drive
η
e
fan air power divided by the motor input power for the fan without variable speed drive
3.10.2.4
overall efficiency for a fan with variable speed drive
η
ed
fan air power divided by the drive control electrical input power for the fan with variable speed drive
3.10.2.5
relationship between powers and efficiencies

Table 2 — Relationship between powers and efficiencies
Input powers Installation category
 A and C B and D
Fan static air power (P ) Fan air power (P )
us u
Static efficiencies Total efficiencies
Drive/control electrical input power η = P /P η = P /P

esd us ed ed u ed
(P )
ed
Motor input power (P ) η = P /P η = P /P
e
e u e
es us e
Motor output power (P ) η = P /P η = P /P
o   o
u o
os us o
Fan shaft power (P ) η = P /P η = P /P
a   a
u a
as us a
Fan impeller power (Pr) η = P /P ηr = P /P
rs us r u r
3.10.3
motor efficiency
η
m
motor output power divided by the motor input power
3.10.4
variable speed drive efficiency
η
c
motor input power divided by the drive control electrical input power
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