IEC 60704-2-2:2023

IEC 60704-2-2 ®
Edition 3.0 2023-12
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60704-2-2:2023 includes the content of the references made to
IEC 60704-1:2021
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 Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 60704-2-2 ®
Edition 3.0 2023-12
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60704-2-2:2023 includes the content of the references made to
IEC 60704-1:2021
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
ICS 17.140.20, 97.100.10 ISBN 978-2-8322-8046-1
– 2 – IEC 60704-2-2:2023 EXV  IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Measurement methods and acoustical environments . 10
4.1 General . 10
4.2 Direct method . 10
4.3 Comparison method . 11
4.4 Acoustical environments . 11
4.4.1 General requirements and criterion for adequacy of the test
environment . 11
4.4.2 Criterion for background noise level . 11
4.4.3 Environmental conditions . 12
4.5 Measurement uncertainties . 12
4.5.1 General . 12
4.5.2 Standard deviations on repeatability and reproducibility and standard
deviations related to declaration and verification . 12
5 Instrumentation . 13
5.1 Instrumentation for measuring acoustical data . 13
5.2 Instrumentation for measuring climatic conditions . 13
5.3 Instrumentation for measuring operating conditions . 13
6 Operation and location of appliances under test . 13
6.1 Equipping and pre-conditioning of appliances . 13
6.2 Supply of electric energy and of water or gas . 14
6.3 Climatic conditions . 14
6.4 Loading and operating of appliances during tests . 15
6.5 Location and mounting of appliances . 15
7 Measurement of sound pressure levels . 17
7.1 Microphone array, measurement surface and RSS location for essentially
free field conditions over reflecting plane(s) . 17
7.2 Microphone array and RSS location in hard-walled test rooms . 21
7.3 Microphone array and RSS location in special reverberation test rooms . 21
7.4 Measurements . 21
8 Calculation of sound pressure and sound power levels . 22
8.1 General . 22
8.2 Corrections for background noise levels . 22
8.3 Corrections for the test environment . 23
8.4 Calculation of sound pressure level averaged over the microphone positions . 23
8.5 Calculation of sound power levels with the comparison method . 24
8.6 Calculation of sound power levels in free field conditions over a reflecting
plane . 24
8.7 Calculation of A-weighted sound power level with the direct method in
special reverberation test rooms . 24
9 Information to be recorded . 25
9.1 General data . 25
9.2 Description of appliance under test . 25

9.3 Measurement method . 25
9.4 Acoustical test environment . 26
9.5 Instrumentation . 26
9.6 Equipment and pre-conditioning of appliance under test . 26
9.7 Electric supply, water supply, etc. . 26
9.8 Climatic conditions . 26
9.9 Operation of the appliance under test . 27
9.10 Location and mounting of the appliance under test. 27
9.11 Microphone array . 27
9.12 Measurement data . 27
9.13 Calculated sound pressure and sound power levels . 28
9.14 Reporting . 28
10 Information to be reported . 28
10.1 General data . 28
10.2 Appliance under test . 28
10.3 Test conditions for the appliance . 28
10.4 Acoustical data . 29
Annex A (normative) Standard test table . 30
Annex B (normative) Test enclosure . 31
Annex C (informative) Guidelines for the design of simple test rooms with essentially
free field conditions. 32
Bibliography . 33

Figure 1 – Measurement surface – parallelepiped – with key microphone positions, for
floor free-standing appliances . 18
Figure 2 – Measurement surface – parallelepiped – with key microphone positions, for
floor standing appliances placed against a wall . 19
Figure 4 – Measurement surface – hemisphere – with key microphone positions, for
hand-held, table type and floor-treatment appliances . 20
Figure A.1 – Example of standard test table . 30
Figure B.1 – Test enclosure . 31

Table 1 – Standard deviations of sound power levels . 12
Table 2 – Standard deviations for declaration and verification . 12

– 4 – IEC 60704-2-2:2023 EXV  IEC 2023
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 IE
...

IEC 60704-2-2 ®
Edition 3.0 2023-12
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60704-2-2:2023 includes the content of the references made to
IEC 60704-1:2021
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 Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 60704-2-2 ®
Edition 3.0 2023-12
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60704-2-2:2023 includes the content of the references made to
IEC 60704-1:2021
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
ICS 17.140.20, 97.100.10 ISBN 978-2-8322-8046-1
– 2 – IEC 60704-2-2:2023 EXV  IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Measurement methods and acoustical environments . 10
4.1 General . 10
4.2 Direct method . 10
4.3 Comparison method . 11
4.4 Acoustical environments . 11
4.4.1 General requirements and criterion for adequacy of the test
environment . 11
4.4.2 Criterion for background noise level . 11
4.4.3 Environmental conditions . 12
4.5 Measurement uncertainties . 12
4.5.1 General . 12
4.5.2 Standard deviations on repeatability and reproducibility and standard
deviations related to declaration and verification . 12
5 Instrumentation . 13
5.1 Instrumentation for measuring acoustical data . 13
5.2 Instrumentation for measuring climatic conditions . 13
5.3 Instrumentation for measuring operating conditions . 13
6 Operation and location of appliances under test . 13
6.1 Equipping and pre-conditioning of appliances . 13
6.2 Supply of electric energy and of water or gas . 14
6.3 Climatic conditions . 14
6.4 Loading and operating of appliances during tests . 15
6.5 Location and mounting of appliances . 15
7 Measurement of sound pressure levels . 17
7.1 Microphone array, measurement surface and RSS location for essentially
free field conditions over reflecting plane(s) . 17
7.2 Microphone array and RSS location in hard-walled test rooms . 21
7.3 Microphone array and RSS location in special reverberation test rooms . 21
7.4 Measurements . 21
8 Calculation of sound pressure and sound power levels . 22
8.1 General . 22
8.2 Corrections for background noise levels . 22
8.3 Corrections for the test environment . 23
8.4 Calculation of sound pressure level averaged over the microphone positions . 23
8.5 Calculation of sound power levels with the comparison method . 24
8.6 Calculation of sound power levels in free field conditions over a reflecting
plane . 24
8.7 Calculation of A-weighted sound power level with the direct method in
special reverberation test rooms . 24
9 Information to be recorded . 25
9.1 General data . 25
9.2 Description of appliance under test . 25

9.3 Measurement method . 25
9.4 Acoustical test environment . 26
9.5 Instrumentation . 26
9.6 Equipment and pre-conditioning of appliance under test . 26
9.7 Electric supply, water supply, etc. . 26
9.8 Climatic conditions . 26
9.9 Operation of the appliance under test . 27
9.10 Location and mounting of the appliance under test. 27
9.11 Microphone array . 27
9.12 Measurement data . 27
9.13 Calculated sound pressure and sound power levels . 28
9.14 Reporting . 28
10 Information to be reported . 28
10.1 General data . 28
10.2 Appliance under test . 28
10.3 Test conditions for the appliance . 28
10.4 Acoustical data . 29
Annex A (normative) Standard test table . 30
Annex B (normative) Test enclosure . 31
Annex C (informative) Guidelines for the design of simple test rooms with essentially
free field conditions. 32
Bibliography . 33

Figure 1 – Measurement surface – parallelepiped – with key microphone positions, for
floor free-standing appliances . 18
Figure 2 – Measurement surface – parallelepiped – with key microphone positions, for
floor standing appliances placed against a wall . 19
Figure 4 – Measurement surface – hemisphere – with key microphone positions, for
hand-held, table type and floor-treatment appliances . 20
Figure A.1 – Example of standard test table . 30
Figure B.1 – Test enclosure . 31

Table 1 – Standard deviations of sound power levels . 12
Table 2 – Standard deviations for declaration and verification . 12

– 4 – IEC 60704-2-2:2023 EXV  IEC 2023
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 IE
...

IEC 60704-2-2 ®
Edition 3.0 2023-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
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 Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 60704-2-2 ®
Edition 3.0 2023-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
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
ICS 17.140.20, 97.100.10 ISBN 978-2-8322-8042-3

– 2 – IEC 60704-2-2:2023 RLV  IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 2
1 Scope and object . 7
2 Normative references . 8
3 Terms and definitions . 8
4 Measurement methods and acoustical environments . 8
5 Instrumentation . 9
6 Operation and location of appliances under test . 10
7 Measurement of sound pressure levels . 12
8 Calculation of sound pressure and of sound power levels . 12
9 Information to be recorded . 12
10 Information to be reported . 13
Annexes . 14
Bibliography . 15

Table 1 – Standard deviations of sound power levels . 9
Table 2 – Standard deviations for declaration and verification . 9

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 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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s),
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
https://patents.iec.ch. IEC shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 60704-2-2:2009. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
– 4 – IEC 60704-2-2:2023 RLV  IEC 2023
IEC 60704-2-2 has been prepared by subcommittee 59C: Electrical heating appliances for
household and similar purposes, of IEC technical committee 59: Performance of household
and similar electrical appliances. It is an International Standard.
This third edition cancels and replaces the second edition published in 2009. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– alignment with the latest edition of IEC 60704-1:2021,
– addition of several ISO standards,
– revision of built-in-conditions,
– addition of requirements on climatic conditions and on background noise.
The text of this International Standard is based on the following documents:
Draft Report on voting
59C/284/CDV 59C/286/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This part 2-2 is intended to be used in conjunction with the fourth edition of IEC 60704-1:2021,
Household and similar electrical appliances – Test code for the determination of airborne
acoustical noise – Part 1: General requirements.
The relevant text of IEC 60704-1:2021 as amended by this publication establishes the test
code for fan heaters.
This part 2-2 supplements or modifies the corresponding clauses in IEC 60704-1:2021.
When a particular subclause of IEC 60704-1:2021 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 IEC 60704-1:2021 shall be adapted accordingly.
Subclauses or figures which are additional to those in IEC 60704-1:2021 are numbered
starting from 101.
Additional annexes are lettered AA, BB, etc.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at www.iec.ch/members_experts/refdocs. The main document types developed by
IEC are described in greater detail at www.iec.ch/publications.
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 document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document 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.
– 6 – IEC 60704-2-2:2023 RLV  IEC 2023
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.

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 part of IEC 60704 applies to electric fan heaters, designed for placing on the floor, table
or counter, etc., or for wall mounting.
This document 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 signi
...

IEC 60704-2-2 ®
Edition 3.0 2023-12
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.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
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IEC 60704-2-2 ®
Edition 3.0 2023-12
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
INTERNATIONALE
ICS 17.140.20, 97.100.10 ISBN 978-2-8322-7974-8

– 2 – IEC 60704-2-2:2023  IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Measurement methods and acoustical environments . 6
5 Instrumentation . 7
6 Operation and location of appliances under test . 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 . 11
Annexes . 12
Bibliography . 13

Table 1 – Standard deviations of sound power levels . 7
Table 2 – Standard deviations for declaration and verification . 7

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 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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s),
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
https://patents.iec.ch. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60704-2-2 has been prepared by subcommittee 59C: Electrical heating appliances for
household and similar purposes, of IEC technical committee 59: Performance of household
and similar electrical appliances. It is an International Standard.
This third edition cancels and replaces the second edition published in 2009. This edition
constitutes a technical revision.

– 4 – IEC 60704-2-2:2023  IEC 2023
This edition includes the following significant technical changes with respect to the previous
edition:
– alignment with the latest edition of IEC 60704-1:2021,
– addition of several ISO standards,
– revision of built-in-conditions,
– addition of requirements on climatic conditions and on background noise.
The text of this International Standard is based on the following documents:
Draft Report on voting
59C/284/CDV 59C/286/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This part 2-2 is intended to be used in conjunction with the fourth edition of IEC 60704-1:2021,
Household and similar electrical appliances – Test code for the determination of airborne
acoustical noise – Part 1: General requirements.
The relevant text of IEC 60704-1:2021 as amended by this publication establishes the test
code for fan heaters.
This part 2-2 supplements or modifies the corresponding clauses in IEC 60704-1:2021.
When a particular subclause of IEC 60704-1:2021 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 IEC 60704-1:2021 shall be adapted accordingly.
Subclauses or figures which are additional to those in IEC 60704-1:2021 are numbered
starting from 101.
Additional annexes are lettered AA, BB, etc.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at www.iec.ch/members_experts/refdocs. The main document types developed by
IEC are described in greater detail at www.iec.ch/publications.
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 dec
...