SIST EN 60879:2019
(Main)Comfort fans and regulators for household and similar purposes - Methods for measuring performance
Comfort fans and regulators for household and similar purposes - Methods for measuring performance
This standard specifies the performance-measuring methods of comfort fans and regulators for household and similar purposes, including conventional fans, tower fans and bladeless fans, their rated voltage being not more than 250 V for single-phase fans and 480 V for other fans, and their rated power input being less than 125 W. Wherever applicable, the term "fan" used in this document includes its associated regulator, if any.
Komfortventilatoren und Regler für den Hausgebrauch und ähnliche Zwecke – Verfahren zur Messung der Gebrauchseigenschaften
Ventilateurs de confort et régulateurs de vitesse pour applications domestiques et analogues - Méthodes de mesure de l'aptitude à la fonction
L'IEC 60879:2019 spécifie les méthodes de mesure de l'aptitude à la fonction des ventilateurs de confort et des régulateurs de vitesse pour applications domestiques et analogues, notamment les ventilateurs conventionnels, les ventilateurs à colonne et les ventilateurs sans pales, présentant une tension assignée inférieure ou égale à 250 V pour les ventilateurs monophasés et inférieure ou égale à 480 V pour les autres ventilateurs, ainsi qu'une puissance absorbée nominale inférieure à 125 W.
Selon la méthode d'essai, les ventilateurs de confort se classent en deux groupes:
– ventilateurs sur pied, ventilateurs de table, ventilateurs muraux, ventilateurs rotatifs, ventilateurs à colonne, ventilateurs sans pales;
– ventilateurs de plafond.
Lorsqu'il y a lieu, le terme "ventilateur" employé dans le présent document couvre également son régulateur (si le ventilateur en est équipé d'un).
Le présent document ne s'applique pas à:
– la sécurité des ventilateurs électriques pour applications domestiques et analogues (IEC 60335-2-80);
– l'aptitude à la fonction des aérateurs (IEC 60665);
– la compatibilité électromagnétique des ventilateurs (CISPR 14-1 et CISPR 14-2, IEC 61000-3-2, IEC 61000 3-3).
Cette deuxième édition annule et remplace la première édition parue en 1986. Cette édition constitue une révision technique.
Cette édition comprend les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) les définitions des ventilateurs ont été révisées;
b) les méthodes d'essai des différents types de ventilateurs ont été révisées afin de permettre l'emploi d'appareils de mesure modernes;
c) des méthodes de mesure ont été ajoutées pour les mesurages du bruit acoustique et de la consommation d'électricité.
Prezračevalni ventilatorji in regulatorji za gospodinjstvo in podobno uporabo - Metode za merjenje lastnosti
Ta standard določa metode merjenja zmogljivosti prezračevalnih ventilatorjev in regulatorjev za gospodinjske ter podobne namene, vključno z običajnimi ventilatorji, stolpnimi ventilatorji in ventilatorji brez lopatic, pri čemer njihova nazivna napetost ne presega 250 V pri enofaznih ventilatorjih in 480 V pri drugih ventilatorjih, njihova nazivna vhodna moč pa je manjša od 125 W. Kjer je primerno, izraz »ventilator«, uporabljen v tem dokumentu, vključuje tudi pripadajoči regulator, če obstaja.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60879:2019
01-november-2019
Prezračevalni ventilatorji in regulatorji za gospodinjstvo in podobno uporabo -
Metode za merjenje lastnosti
Comfort fans and regulators for household and similar purposes - Methods for measuring
performance
Ta slovenski standard je istoveten z: EN 60879:2019
ICS:
23.120 Zračniki. Vetrniki. Klimatske Ventilators. Fans. Air-
naprave conditioners
SIST EN 60879:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60879:2019
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SIST EN 60879:2019
EUROPEAN STANDARD EN IEC 60879
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2019
ICS 23.120
English Version
Comfort fans and regulators for household and similar purposes
- Methods for measuring performance
(IEC 60879:2019)
Ventilateurs de confort et régulateurs de vitesse pour Komfortventilatoren und Regler für den Hausgebrauch und
applications domestiques et analogues - Méthodes de ähnliche Zwecke - Verfahren zur Messung der
mesure de l'aptitude à la fonction Gebrauchseigenschaften
(IEC 60879:2019) (IEC 60879:2019)
This European Standard was approved by CENELEC on 2019-06-26. CENELEC 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.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60879:2019 E
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SIST EN 60879:2019
EN IEC 60879:2019 (E)
European foreword
The text of document 59L/171/FDIS, future edition 2 of IEC 60879, prepared by SC 59L "Small
household appliances" of IEC/TC 59 "Performance of household and similar electrical appliances" was
submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 60879:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-03-26
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-06-26
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60879:2019 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60335-2-80 NOTE Harmonized as EN 60335-2-80
IEC 60665 NOTE Harmonized as EN IEC 60665
IEC 61000-3-2 NOTE Harmonized as EN IEC 61000-3-2
IEC 61000-3-3 NOTE Harmonized as EN 61000-3-3
CISPR 14-1 NOTE Harmonized as EN 55014-1
CISPR 14-2 NOTE Harmonized as EN 55014-2
2
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SIST EN 60879:2019
EN IEC 60879:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60704-2-7 - Household and similar electrical appliances - Test EN 60704-2-7 -
code for the determination of airborne acoustical
noise - Part 2-7: Particular requirements for fans
IEC 62301 - Household electrical appliances - Measurement of EN 50564 -
standby power
3
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SIST EN 60879:2019
IEC 60879
®
Edition 2.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Comfort fans and regulators for household and similar purposes – Methods for
measuring performance
Ventilateurs de confort et régulateurs de vitesse pour applications domestiques
et analogues – Méthodes de mesure de l'aptitude à la fonction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 23.120 ISBN 978-2-8322-6957-2
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 60879:2019
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CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Information provision . 7
5 Tests . 7
5.1 General conditions for testing . 7
5.1.1 Atmospheric conditions . 7
5.1.2 Conditioning of test equipment . 7
5.1.3 Voltage and frequency . 7
5.1.4 Running-in of the fan . 8
5.1.5 Operation of the fan . 8
5.1.6 Conditioning prior to each test . 8
5.2 Testing of air performance . 8
5.2.1 Ceiling fans . 8
5.2.2 Comfort fans other than ceiling fans . 9
5.3 Measurement of regulator performance . 12
5.3.1 Measurement of the regulation ratio for comfort fans other than
bladeless fans . 12
5.3.2 Measurement of the regulation ratio for bladeless fans . 12
5.4 Measurement of fan power input . 12
5.5 Measurement of sound power level . 12
5.6 Measurement of standby power . 13
Annex A (informative) Positioning of 4 anemometers in horizontal and vertical
directions . 16
Annex B (informative) Dimensions, measuring ranges and accuracies of some vane
anemometers . 17
Annex C (normative) Setting air flow direction for tower fans . 18
Bibliography . 19
Figure 1 – Arrangement of test chamber and outer screen for ceiling fans . 13
Figure 2 – Plan of test chamber and outer screen for ceiling fans . 14
Figure 3 – Measurement configuration for bladeless fans and tower fans . 15
Figure A.1 – Configuration of 4 anemometers for conventional fans . 16
Figure B.1 – Typical anemometers for use when testing bladeless fans and tower fans . 17
Figure C.1 – Tower fan positioning . 18
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SIST EN 60879:2019
IEC 60879:2019 © IEC 2019 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMFORT FANS AND REGULATORS
FOR HOUSEHOLD AND SIMILAR PURPOSES –
METHODS FOR MEASURING PERFORMANCE
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60879 has been prepared by subcommittee 59L: Small household
appliances, of IEC technical committee 59: Performance of household and similar electrical
appliances
This second edition cancels and replaces the first edition published in 1986. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the definitions of fans have been revised;
b) the test methods for the different types of fans have been revised to allow modern test
instrumentation to be used;
c) acoustic noise measurement and standby power measurement methods have been
introduced.
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The text of this International Standard is based on the following documents:
FDIS Report on voting
59L/171/FDIS 59L/172/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
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SIST EN 60879:2019
IEC 60879:2019 © IEC 2019 – 5 –
COMFORT FANS AND REGULATORS
FOR HOUSEHOLD AND SIMILAR PURPOSES –
METHODS FOR MEASURING PERFORMANCE
1 Scope
This International Standard specifies the performance-measuring methods of comfort fans and
regulators for household and similar purposes, including conventional fans, tower fans and
bladeless fans, their rated voltage being not more than 250 V for single-phase fans and 480 V
for other fans, and their rated power input being less than 125 W.
NOTE 1 According to the testing method, the comfort fans are classified into two groups:
– pedestal fans, table fans, wall fans, louvre fans, tower fans, bladeless fans;
– ceiling fans.
Wherever applicable, the term "fan" used in this document includes its associated regulator, if
any.
NOTE 2 This document does not apply to
– safety of electric fans for household and similar purposes (IEC 60335-2-80);
– performance of ventilating fans (IEC 60665);
– electromagnetic compatibility of fans (CISPR 14-1 and CISPR 14-2, IEC 61000-3-2, IEC 61000-3-3).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 60704-2-7, Household and similar electrical appliances – Test code for the determination
of airborne acoustical noise – Part 2-7: Particular requirements for fans
IEC 62301, Household electrical appliances – Measurement of standby power
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
NOTE When the term “voltage” is used, it implies an RMS value unless otherwise specified.
3.1
comfort fan
fan primarily designed for creating air movement around or on part of a human body for
personal cooling comfort, including fans that can perform additional functionalities such as
lighting
Note 1 to entry: A comfort fan is hereinafter also referred to by the term "fan".
3.2
conventional fan
comfort fan with a propeller having two or more blades, with free inlet and outlet of air
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3.3
tower fan
comfort fan for use on the floor having a vertically elongated design of the cross-flow type,
tangential type, centrifugal type or impeller type with a free inlet and outlet of air
3.4
bladeless fan
comfort fan of any type that is not fitted with a propeller
3.5
ceiling fan
conventional fan provided with a device for suspension from the ceiling of a room so that the
blades rotate in a horizontal plane with the diameter of the blade not larger than 1 800 mm
3.6
table fan
comfort fan intended for use on a table
Note 1 to entry: Table fans have a maximum adjustable or non-adjustable height of less than 1 200 mm.
3.7
pedestal fan
comfort fan mounted on a pedestal of fixed or variable height
Note 1 to entry: Pedestal fans have a minimum adjustable height or non-adjustable height equal to or greater
than 1 200 mm.
3.8
wall bracket fan
comfort fan for mounting on the wall
3.9
ceiling bracket fan
comfort fan for mounting on the ceiling
3.10
louvre fan
comfort fan having moving louvre which provides a continuously changing multi-directional air
flow
3.11
rated fan flow rate
air flow rate assigned to the fan by the manufacturer
3
Note 1 to entry: The rated fan flow rate is expressed in m /min.
3.12
service value
3
ratio of the calculated maximum fan flow rate [m /min] to the measured fan power input [W]
Note 1 to entry: The service value is also known as the "coefficient of performance (COP)".
3.13
fan power input
power input of the fan operating at its maximum flow rate, measured with the oscillation
mechanism and the moving louvre, if any, turned off
Note 1 to entry: The power inputs for other functions, such as lighting are not included.
3.14
rated voltage
voltage assigned to the fan by the manufacturer
3.15
rated frequency
frequency assigned to the fan by the manufacturer
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IEC 60879:2019 © IEC 2019 – 7 –
3.16
maximum fan flow rate
3
air flow rate of the comfort fan at its maximum setting [m /min], measured at the fan outlet
with the oscillating mechanism and the moving louvre, if any, turned off
3.17
oscillating mechanism
capability of the comfort fan to automatically vary the direction of the air flow while the fan is
operating
3.18
fan sound power level
A-weighted sound power level of the comfort fan while providing the maximum fan flow rate,
measured at the outlet side
3.19
moving louvre
grill provided at the air outlet of louvre fans, which is used to control the direction of the air
flow by its rotation or position
3.20
equivalent sweep size diameter of bladeless fan
value obtained by dividing the perimeter of the bladeless fan air outlet by 3,14
Note 1 to entry: The perimeter is obtained by measuring the length of the rope that wraps along the complete
enclosure of the bladeless fan's air outlet.
4 Information provision
Manufacturers shall provide the following information in the instructions:
3
a) rated fan flow rate m /min (rounded to one decimal place);
3
b) service value (m /min)/W (rounded to one decimal place);
c) standby power consumption W (rounded to one decimal place);
d) sound power level dB(A).
5 Tests
5.1 General conditions for testing
5.1.1 Atmospheric conditions
Unless otherwise specified, the test procedures and measurements shall be carried out under
the following conditions:
– temperature: 20 °C ± 5°C, in case of doubt the temperature shall be 23 °C ± 2°C;
– relative humidity: 50 % ± 30 %;
– air pressure: 86 kPa to 106 kPa.
NOTE Temperature and humidity conditions within the specified ranges are required for good repeatability and
reproducibility.
Care should be taken to avoid changes in temperature and relative humidity during the test.
5.1.2 Conditioning of test equipment
Measuring equipment to be used for the tests shall be stored for at least 16 h at the
atmospheric conditions specified in 5.1.1 prior to the test.
5.1.3 Voltage and frequency
The tests shall be conducted at the rated voltage. Fans designed for DC only shall be
operated at DC. Fans designed for both AC and DC shall be operated at AC. Fans not marked
with rated frequency shall be operated at either 50 Hz ± 1 Hz or 60 Hz ± 1 Hz as is common in
the country of use and with a total harmonic distortion ≤ 5 %.
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Unless otherwise specified, the tests are carried out at a specific test voltage within a voltage
range (for example 100 V to 240 V) or at the rated voltage or rated voltages (for example
120 V or 120 V and 240 V).
The stability of the voltage shall be ± 1 %.
5.1.4 Running-in of the fan
Prior to starting the tests on a new fan, it shall run at its maximum airflow setting with
unrestricted air flow and with the oscillating mechanisms and moving louvres, if any, in
operation for at least 1 hour to ensure adequate running-in. Any other functions such as
luminaires, purifiers, humidifiers, heaters, if any, shall be connected.
5.1.5 Operation of the fan
Before starting the tests, the fan and its attachments are adjusted in accordance with the
manufacturer's instructions for normal operation. Any controls shall be set for maximum
continuous air flow unless the manufacturer's instruction states otherwise. Any other functions
such as luminaires, purifiers, humidifiers, heaters, if any, shall be turned off.
5.1.6 Conditioning prior to each test
Prior to starting each test, the fan shall be conditioned for 30 min under the provisions given
in 5.1.4 but with oscillating mechanisms and moving louvres, if any, not in operation.
5.2 Testing of air performance
5.2.1 Ceiling fans
5.2.1.1 Test chamber
The fan shall be tested in a test chamber having the following dimensions: length 4 500 mm,
width 4 500 mm, height 3 000 mm (see Figure 1 and Figure 2).
The above dimensions shall have a tolerance of ± 15 mm.
The top of the test chamber shall be covered by the clapboard, except for a centrally situated
circular opening (top-opening), the diameter (D) of the top opening shall be between
1,1 and 1,2 times the blade's sweep. The top clapboard in which the top opening is located
shall be not more than 6 mm thick. The bottom of the test chamber is 450 mm from the ground,
to leave a suitable space for air outlet.
Readings shall be taken from a position between the chamber and the outer screen, and a
small shelf for electrical instruments may be provided in this space. Except for these, the
space between the test chamber and the outer screen and the space inside the test chamber
shall be clear of all obstructions, and any conditioning apparatus (including heating or cooling)
shall have no influence on the movement of air in the test room while the test is in progress.
The room in which the test chamber and the outer screen are erected shall be suitably
protected against extraneous draughts.
Any ceiling external to the test chamber or any projecting beam which might interfere with the
air flow shall be not less than 1 000 mm above the top opening, i.e. not less than 4 000 mm
from the ground level at this point.
The distances between the walls of the chamber and the walls of the outer screen
shall be 1 000 mm to 1 250 mm.
The fan shall be placed at such a height that the plane of the fan blades is 3 000 mm ± 10 mm
from the ground level and lies in the plane of the top edge of the clapboard containing the top
opening in the roof of the test chamber.
5.2.1.2 Measuring instrument
The air movement shall be measured by means of vane anemometers having an internal
diameter not exceeding 100 mm.
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5.2.1.3 Arrangement of apparatus
The plane of the fan blades lies in the plane of the top edge of the clapboard containing the
top opening in the roof of the test chamber.
A flat plate is installed above the ceiling fan, the size of which shall be between 1,1 and 1,2
times the blade diameter. The distance between the plate and the plane of the fan blades is
determined by the distance between the plane of the fan blades and the ceiling after the
ceiling fan has been installed in accordance with the instructions for use.
The plane of the anemometer's vane is parallel to the plane of the fan blades. The
anemometers shall be moved in either direction along both diagonals of the test chamber in a
test plane 1 500 mm ± 10 mm below the plane of the fan blades. The anemometers shall be
supported in such a manner as to cause as little obstruction as possible to the air flow.
5.2.1.4 Procedure for test
The measurements shall be carried out with the fan running at full speed at the test voltage.
Air velocity measurements in each of four directions shall commence at a point 40 mm from
the axis of the fan blades and shall progress horizontally to the fan blade axis in increments of
80 mm along the semi-diagonals of the test chamber (3 to A, 3 to B, 3 to AA and 3 to BB in
Figure 2). The measurements shall be continued in the 80-mm increments until the air velocity
in each of the four directions falls below 9 m/min.
The air velocity shall be averaged over a period of 60 s using an update rate of not less
than 2 Hz.
The average air velocity through each annulus is taken as the mean of the 8 air velocities
obtained at each anemometer position on the inner and outer radii of the annulus. The mean
radius of each annulus is equal to the mean of the inner and outer radii of the annulus.
Average air velocities below 9 m/min are discarded.
5.2.1.5 Calculation of flow rate
For each annulus having an average air velocity equal to or greater than 9 m/min, the product
of the area of the annulus and the average air velocity through that annulus, shall be taken as
the air delivery through that annulus.
The sum of the air deliveries through all such annuli shall be taken as the measured flow rate
of the fan for the purposes of this document.
No correction is made for relative humidity or air pressure.
5.2.2 Comfort fans other than ceiling fans
5.2.2.1 Test chamber
The fan shall be tested in a test chamber having the following dimensions: length: 4 500 mm
for the sweep size or the equivalent sweep size (for bladeless fans) not larger than 400 mm,
and 6 000 mm for the sweep size or the equivalent sweep size (for bladeless fans) larger than
400 mm, width: 4 500 mm, height: 3 000 mm. The chamber shall be suitably protected from
extraneous draughts.
The test chamber shall be free from obstructions other than the stand on which the fan is kept.
Any table or shelf for electrical instruments shall be on the opposite side of the fan to the test
plane, beyond a distance of 900 mm from the plane of fan blades for the fans other than tower
fans and bladeless fans, or the plane of the air outlet for tower fans and bladeless fans.
NOTE For tower fans, the plane of the air outlet refers to the longitudinal cross-sectional plane, vertical to the
central line. For bladeless fans, the plane of the air outlet refers to the outlet plane closer to the anemometers.
Any air conditioning apparatus used in the test room shall have no influence on the movement
of the air in the test chamber while t
...
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