IEC 60704-2-2:2009

Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-2: Particular requirements for fan heaters

IEC 60704-2-2:2009 provides the methods of determination of airborne acoustical noise emitted by electric fan heaters, designed for placing on the floor, table or counter,etc., or for wall mounting supplied from mains or from batteries. The main changes from the previous edition are as follows: provisions with regard to measurement uncertainty and standard deviation for declaration and verification have been included in the scope.
This publication is to be read in conjunction with IEC 60704-1:2010.

Appareils électrodomesiques et analogues - Code d'essai pour la détermination du bruit aérien - Partie 2-2: Exigences particulières pour les appareils de chauffage soufflants

La CEI 60704-2-2:2009 fournit la méthode pour la détermination du bruit aérien émis par les appareils de chauffage soufflants électriques, conçus pour être placés sur le sol, sur une table ou sur un plan de travail, etc., ou pour être fixés au mur. Les principales modifications de la présente édition par rapport à l'édition précédente sont l'addition des dispositions pour les incertitudes de mesure, ainsi que des écarts types pour la déclaration et la vérification.
Cette publication doit être lue conjointement avec la CEI 60704-1:2010.

General Information

• Status: Published
• Publication Date: 22-Jul-2009
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 97.100.10 - Electric heaters
• Technical Committee: SC 59C - Electrical heating appliances for household and similar purposes
• Current Stage: DELPUB - Deleted Publication
• Start Date: 14-Dec-2023
• Completion Date: 07-Sep-2022

Relations

• Revised: IEC 60704-2-2:2023 - Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-2: Particular requirements for fan heaters
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60704-2-2 ®
Edition 2.0 2009-07
INTERNATIONAL
STANDARD
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-2: Particular requirements for fan heaters

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,

please contact the address below or your local IEC member National Committee for further information.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: [e-mail]
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About the IEC
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IEC 60704-2-2 ®
Edition 2.0 2009-07
INTERNATIONAL
STANDARD
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-2: Particular requirements for fan heaters

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
M
ICS 17.140.20; 97.100.10 ISBN 978-2-88910-256-3
– 2 – 60704-2-2 © IEC:2009(E)
CONTENTS
FOREWORD.3

INTRODUCTION.5

1 Scope and object.6

1.1 Scope.6

1.1.1 General .6

1.1.2 Types of noise.6

1.1.3 Size of the source.6
1.2 Object .6
1.3 Measurement uncertainty .7
2 Normative references .7
3 Terms and definitions .7
4 Measurement methods and acoustical environments .7
5 Instrumentation .7
6 Operation and location of appliances under test .8
6.1 Equipping and pre-conditioning of appliances.8
6.2 Supply of electric energy and of water or gas .8
7 Measurement of sound pressure levels.10
8 Calculation of sound pressure and of sound power levels.10
9 Information to be recorded.10
10 Information to be reported .10

Annexes .12

60704-2-2 © IEC:2009(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

______________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

TEST CODE FOR THE DETERMINATION OF

AIRBORNE ACOUSTICAL NOISE –
Part 2-2: Particular requirements for fan heaters

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 60704-2-2 has been prepared by subcommittee 59C: Heating
appliances, of IEC technical committee 59: Performance of household and similar electrical
appliances.
This second edition cancels and replaces the first edition published in 1985 and constitutes a
technical revision. The main changes from the previous edition are as follows: provisions with
regard to measurement uncertainty and standard deviation for declaration and verification
have been included in the scope.

– 4 – 60704-2-2 © IEC:2009(E)
The text of this standard is based on the following documents:

CDV Result on voting
59C/134/CDV 59C/140/RVC
Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with ISO/IEC Directives, Part 2.

This part 2-2 is intended to be used in conjunction with IEC 60704-1, 2nd edition 1997:
Household and similar electrical appliances – Test code for the determination of airborne
acoustical noise – Part 1: General requirements.
The relevant text of part 1 as amended by this publication establishes the test code for fan
heaters.
This part 2-2 supplements or modifies the corresponding clauses in IEC 60704-1:1997. When
a particular subclause of part 1 is not mentioned in this part 2-2, that subclause applies as far
as reasonable. Where this standard states "addition“, "modification“ or "replacement“, the
relevant requirement, test specifications or explanatory matter in part 1 shall be adapted
accordingly.
Subclauses or figures which are additional to those in part 1 are numbered starting from 101.
Additional annexes are lettered AA, BB, etc.
A list of all the parts in the IEC 60704 series, under the general title Household and similar
electrical appliances – Test code for the determination of airborne acou
...

IEC 60704-2-2 ®
Edition 2.0 2009-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Test code for the determination
of airborne acoustical noise –
Part 2-2: Particular requirements for fan heaters

Appareils électrodomestiques et analogues – Code d’essai pour la détermination
du bruit aérien –
Partie 2-2: Exigences particulières pour les appareils de chauffage soufflants

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

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microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
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International Standards for all electrical, electronic and related technologies.

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IEC 60704-2-2 ®
Edition 2.0 2009-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Test code for the determination

of airborne acoustical noise –

Part 2-2: Particular requirements for fan heaters

Appareils électrodomestiques et analogues – Code d’essai pour la

détermination du bruit aérien –

Partie 2-2: Exigences particulières pour les appareils de chauffage soufflants

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 17.140.20; 97.100.10 ISBN 978-2-8322-0935-6

– 2 – 60704-2-2  IEC:2009
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope and object . 6
1.1 Scope . 6
1.1.1 General . 6
1.1.2 Types of noise . 6
1.1.3 Size of the source . 6
1.2 Object . 6
1.3 Measurement uncertainty . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Measurement methods and acoustical environments . 7
5 Instrumentation . 7
6 Operation and location of appliances under test . 8
6.1 Equipping and pre-conditioning of appliances . 8
6.2 Supply of electric energy and of water or gas . 8
7 Measurement of sound pressure levels . 10
8 Calculation of sound pressure and of sound power levels . 10
9 Information to be recorded. 10
10 Information to be reported . 10

Annexes . 12

60704-2-2  IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION OF
AIRBORNE ACOUSTICAL NOISE –
Part 2-2: Particular requirements for fan heaters

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 60704-2-2 has been prepared by subcommittee 59C: Heating
appliances, of IEC technical committee 59: Performance of household and similar electrical
appliances.
This second edition cancels and replaces the first edition published in 1985 and constitutes a
technical revision. The main changes from the previous edition are as follows: provisions with
regard to measurement uncertainty and standard deviation for declaration and verification
have been included in the scope.

– 4 – 60704-2-2  IEC:2009
This bilingual version (2013-07) corresponds to the monolingual English version, published in
2009-07.
The text of this standard is based on the following documents:
CDV Result on voting
59C/134/CDV 59C/140/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with ISO/IEC Directives, Part 2.
This part 2-2 is intended to be used in conjunction with IEC 60704-1, 2nd edition 1997:
Household and similar electrical appliances – Test code for the determination of airborne
acoustical noise – Part 1: General requirements.
The relevant text of part 1 as amended by this publication establishes the test code for fan
heaters.
This part 2-2 supplements or modifies the corresponding clauses in IEC 60704-1:1997. When
a particular subclause of part 1 is not mentioned in this part 2-2, that subclause applies as far
as reasonable. Where this standard states "addition“, "modification“ or "replacement“, the
relevant requirement, test specifications or explanatory matter in part 1 shall be adapted
accordingly.
Subclauses or figures which are additional to those in part 1 are numbered starting from 101.
Additional annexes are lettered AA, BB, etc.
A list of all the parts in the IEC 60704 series, under the general title Household and similar
electrical appliances – Test code for the determination of airborne acoustical noise, can be
found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
60704-2-2  IEC:2009 – 5 –
INTRODUCTION
The measuring conditions specified in this part 2-2 provide for sufficient accuracy in
determining the noise emitted and comparing the results of measurements taken by different
laboratories, whilst simulating as far as possible the practical use of fan heaters.
It is recommended to consider the determination of noise levels as part of a comprehensive
testing procedure covering many aspects of the properties and performance of fan heaters.
NOTE As stated in the introduction to IEC 60704-1, this test code is concerned with airborne noise only.

– 6 – 60704-2-2  IEC:2009
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION OF
AIRBORNE ACOUSTICAL NOISE –
Part 2-2: Particular requirements for fan heaters

1 Scope and object
This clause of part 1 is applicable except as follows:
1.1 Scope
1.1.1 General
Replacement:
This standard applies to electric fan heaters, designed for placing on the floor, table or
counter, etc., or for wall-mounting.
This standard does not apply to
– electric storage room heaters;
– room humidifiers;
– room dehumidifiers;
– air cleaners;
– heaters designed exclusively for industrial purposes.
1.1.2 Types of noise
Replacement:
ISO 3743-1, ISO 3743-2 and ISO 3744 can be used for measuring noise emitted by fan
heaters.
1.1.3 Size of the source
Replacement:
The method specified in ISO 3744 is applicable to noise sources of any size. When applying
ISO 3743-1 and ISO 3743-2, care should be taken that the maximum size of the appliance
under test fulfils the requirements specified in Subclause 1.3 of ISO 3743-1 and ISO 3743-2.
1.2 Object
Addition:
The frequency range of interest for sound power determination on fan heaters includes at
least the octave bands with centre frequencies from 63 Hz to 8000 Hz.
NOTE 1 In many cases, the 63 Hz octave band level does not participate significantly to the A-weighted level.
NOTE 2 When measuring this 63 Hz octave band, a special attention should be paid to the room effect.

60704-2-2  IEC:2009 – 7 –
Requirements for the declaration of noise emission values are not within the scope of this
standard.
NOTE 3 For determining and verifying noise emission values, declared in product specifications, see IEC 60704-3.
1.3 Measurement uncertainty
Replacement:
The estimated values of standard deviations of sound power levels, determined according to
this standard, are as follows:
Standard deviation, dB
σ (repeatability) σ (reproducibility)
r R
0,4 1,0
1.101 Standard deviation for declaration and verification
For the purpose of determining and verifying declared noise emission values according to
IEC 60704-3, the following values apply:
Standard deviation, dB
σ (production) σ (total) σ (reference)
P t M
0,3 – 1,1 1,0 – 1,6 1,5
2 Normative references
This clause of part 1 is applicable.
3 Terms and definitions
This clause of part 1 is applicable.
4 Measurement methods and acoustical environments
This clause of part 1 is applicable except as follows:
4.2 Direct method
Addition:
NOTE If pure tone components are present in the noise emitted, proper precautions should be taken as specified
in ISO 3743-2.
4.3 Comparison method
Addition:
NOTE If pure tone components are present in the noise emitted, proper precautions should be taken as specified
in ISO 3743-1 and 3743-2.
5 Instrumentation
This clause of part 1 is applicable except as follows:

– 8 – 60704-2-2  IEC:2009
5.1 Addition:
Windscreens should be used and the relevant corrections for changes in the microphone
sensitivity shall be added to the observed sound pressure levels.
6 Operation and location of appliances under test
This clause of part 1 is applicable except as follows:
6.1 Equipping and pre-conditioning of appliances
6.1.1 Addition:
Air filters, if any, shall be clean.
6.1.3 Replacement:
Prior to noise measurements, the appliance equipped in accordance with Subclause 6.1.1,
shall have been in operation for a total period of at least 2 h for running-in at the highest
speed setting with the maximum heating switched on for normal permanent use.
Oscillating function if available shall be switched on.
During the running-in procedure air filters, if any, may be removed. If filters remain in the
appliances during this running-in period, they shall be clean or renewed after this period.
6.1.4 Replacement:
Immediately before each series of noise measurements, the appliance equipped in
accordance with Subclause 6.1.1 shall be operated for stabilizing at the highest speed setting
and maximum heating switched on for normal permanent use for 5 min.
6.2 Supply of electric energy and of water or gas
6.2.1 Modification:
The voltage tolerance shall be ± 0,5 %.
6.2.2 Not applicable
6.2.3 Replacement:
The appliance shall be operated with the heating elements switched on.
Special attention is required to be given to the possible effect of the temperature rise on the
acoustical behaviour of the test room.
6.2.4 Not applicable
6.4 Loading and operating of appliances during tests
6.4.2 Replacement:
The appliance shall be equipped according to 6.1.1.

60704-2-2  IEC:2009 – 9 –
The noise emission shall be determined with the appliance at the highest speed setting and
maximum heating for normal permanent use. Oscillating mechanism, if any, shall be switched
on.
NOTE Other possible speed settings ( minimum heat output, boost position,.) can be measured in addition. The
respective noise levels should be linked to the relevant heat output.
Appropriate adjustment of air intake or exhaust openings shall be done taking into account
manufacturer's instructions if any, or otherwise selecting the configuration that gives the
highest noise emission.
6.4.3 Not applicable
6.5 Location and mounting of appliances
6.5.1 Addition:
The tests under the conditions stated in Subclause 6.5.3 shall be repeated for floor standing-
appliances which may be placed either against or away from the wall.
For such appliances both sets of results shall be recorded and the measurement that gives
highest noise is then chosen.
6.5.2 Not applicable
6.5.3 Replacement:
For measurements on floor-standing appliances intended for placing against a wall, including
those for building in, a vertical reflecting plane having an acoustic absorption coefficient of
less than 0,06 must be used.
When measurements are made in a reverberation test room, a part of the wall of the room will
serve for this purpose. The minimum area of this part of the wall should be determined by the
projection of the appliance extended by at least 0,5 m upwards and to both sides. The
minimum distance between any surface of the appliance or its cabinet and the nearest corner
of the room shall be 1 m.
When measurements are made in a free-field environment, the size of the vertical reflecting
plane (supported by the horizontal reflecting plane) shall be at least equal to the size of the
projection of the measurement surface.
For both types of test environment the following requirements shall be complied with:
– the appliance shall be placed in the test environment without any resilient means of
support other than those incorporated in the appliance;
– care should be taken to avoid any direct contact between the appliance (including
protruding parts, worktops, spacers, etc.) and the vertical reflecting wall;
– the distance between the wall and the appliance shall be established by placing the
appliance in direct contact with the wall and moving it away for a distance not exceeding
10 cm ± 1 cm.
6.5.4 Modification:
The height of the lowest edge of the appliance from the floor shall be 25 cm ± 1 cm.
NOTE For appliances intended for mounting close to the ceiling with the air stream directed towards the floor,
measurements problems may be caused when the appliance is mounted as specified in Subclause 6.5.4. It may be
necessary to mount such an appliance in an inverted position, with the top of the appliance facing towards the floor

– 10 –
...