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

Status
Published
Publication Date
10-Oct-2019
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
25-Jul-2019
Due Date
29-Sep-2019
Completion Date
11-Oct-2019

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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
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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
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SIST EN 60879:2019
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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
– 2 – IEC 60879:2019 © IEC 2019
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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SIST EN 60879:2019
– 4 – IEC 60879:2019 © IEC 2019
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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SIST EN 60879:2019
– 6 – IEC 60879:2019 © IEC 2019
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
Note 1 to entry: The rated fan flow rate is expressed in m /min.
3.12
service value

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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SIST EN 60879:2019
IEC 60879:2019 © IEC 2019 – 7 –
3.16
maximum fan flow rate

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:
a) rated fan flow rate m /min (rounded to one decimal place);
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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SIST EN 60879:2019
– 8 – IEC 60879:2019 © IEC 2019

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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SIST EN 60879:2019
IEC 60879:2019 © IEC 2019 – 9 –
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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Questions, Comments and Discussion

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