IEC 60704-2-19:2026

IEC 60704-2-19 ®
Edition 1.0 2026-01
INTERNATIONAL
STANDARD
EXTENDED VERSION
This full version of IEC 60704-2-19:2026 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 2-19: Particular requirements for air cleaners
ICS 17.140.20; 23.120 ISBN 978-2-8327-1050-0
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 - IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Discover our powerful search engine and read freely all the
The advanced search enables to find IEC publications by a publications previews, graphical symbols and the glossary.
variety of criteria (reference number, text, technical With a subscription you will always have access to up to date
committee, …). It also gives information on projects, content tailored to your needs.
replaced and withdrawn publications.
Electropedia - www.electropedia.org
The world's leading online dictionary on electrotechnology,
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published containing more than 22 500 terminological entries in English
details all new publications released. Available online and and French, with equivalent terms in 25 additional languages.
once 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.
CONTENTS
FOREWORD . 3
INTRODUCTION to IEC 60704-1:2021 . 5
INTRODUCTION to IEC 60704-2-19:2026 . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Measurement methods and acoustical environments . 8
4.1 General . 8
4.2 Direct method . 9
4.3 Comparison method . 9
4.4 Acoustical environments . 10
4.4.1 General requirements and criterion for adequacy of the test
environment . 10
4.4.2 Criterion for background noise level . 10
4.4.3 Environmental conditions . 11
4.5 Measurement uncertainties . 11
4.5.1 General . 11
4.5.2 Standard deviations on repeatability and reproducibility and standard
deviations related to declaration and verification . 11
5 Instrumentation. 12
5.1 Instrumentation for measuring acoustical data . 12
5.2 Instrumentation for measuring climatic conditions . 12
5.3 Instrumentation for measuring operating conditions . 12
6 Operation and location of appliances under test . 12
6.1 Equipping and pre-conditioning of appliances . 12
6.2 Supply of electric energy and of water or gas . 13
6.3 Climatic conditions . 13
6.4 Loading and operating of appliances during tests . 14
6.5 Location and mounting of appliances . 14
7 Measurement of sound pressure levels . 15
7.1 Microphone array, measurement surface and RSS location for essentially
free field conditions over reflecting plane(s) . 15
7.2 Microphone array and RSS location in hard-walled test rooms . 19
7.3 Microphone array and RSS location in special reverberation test rooms . 19
7.4 Measurements . 19
8 Calculation of sound pressure and sound power levels . 20
8.1 General . 20
8.2 Corrections for background noise levels . 20
8.3 Corrections for the test environment . 21
8.4 Calculation of sound pressure level averaged over the microphone positions . 21
8.5 Calculation of sound power levels with the comparison method . 22
8.6 Calculation of sound power levels in free field conditions over a reflecting
plane . 22
8.7 Calculation of A-weighted sound power level with the direct method in
special reverberation test rooms . 23
9 Information to be recorded . 23
9.1 General data . 23
9.2 Description of appliance under test . 23
9.3 Measurement method . 24
9.4 Acoustical test environment . 24
9.5 Instrumentation . 24
9.6 Equipment and pre-conditioning of appliance under test . 24
9.7 Electric supply, water supply, etc. . 24
9.8 Climatic conditions . 24
9.9 Operation of the appliance under test . 25
9.10 Location and mounting of the appliance under test . 25
9.11 Microphone array . 25
9.12 Measurement data . 25
9.13 Calculated sound pressure and sound power levels . 26
9.14 Reporting . 26
10 Information to be reported . 26
10.1 General data . 26
10.2 Appliance under test . 26
10.3 Test conditions for the appliance. 26
10.4 Acoustical data . 27
Annex A (normative) Standard test table . 28
Annex B (normative) Test enclosure . 29
Annex C (informative) Guidelines for the design of simple test rooms with essentially
free field conditions . 30
Bibliography . 31

Figure 1 – Measurement surface – parallelepiped – with key microphone positions, for
floor free-standing appliances . 16
Figure 2 – Measurement surface – parallelepiped – with key microphone positions, for
floor standing appliances placed against a wall . 17
Figure 3 – Deleted .
Figure 4 – Measurement surface – hemisphere – with key microphone positions, for
hand-held, table type and floor-treatment appliances . 18
Figure 5 – Deleted .
Figure A.1 – Example of standard test table . 28
Figure B.1 – Test enclosure . 29

Table 1 – Standard deviations of sound power levels . 11
Table 2 – Standard deviations for declaration and verification . 11

INTERNATIONAL ELECTROTECHNICAL COMMISSION
__________
Household and similar electrical appliances -
Test code for the determination of airborne acoustical noise -
Part 2-19: Particular requirements for air cleaners

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 extended version (EXV) of the official IEC Standard provides the user with the full
content of the Standard.
to IEC 60704-1:2021.
The specific content of IEC 60704-2-19:2026 is displayed on a blue background.

IEC 60704-2-19 has been prepared by subcommittee 59N: Electrical air cleaners for
household and similar purposes, of IEC technical committee 59: Performance of household
and similar electrical appliances. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
59N/87/FDIS 59N/89/RVD
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 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.
This Part 2-19 is intended to be used in conjunction with 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 air cleaners.
This Part 2-19 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 document, that
subclause is applicable as far as reasonable. Where this standard states "addition",
"modification", "replacement" or "deletion", the relevant requirements, test specifications or
explanatory matter in IEC 60704-1 should be adapted accordingly.
Subclauses and tables that are additional to those in IEC 60704-1 are numbered starting
from 101.
Unless notes are in a new subclause or involve notes in IEC 60704-1, they are numbered
starting from 101, including those in a replaced clause or subclause.
In this standard, the following print types are used:
– terms defined in Clause 3: bold type.
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.
INTRODUCTION to IEC 60704-1:2021
Although the noise emitted by household appliances does not generally present a hazard to
the hearing of the operator and other exposed persons, the need for standardization
procedures for the determination of the noise emitted has been recognized for a long time.
Such procedures should be specified, not only for special types of appliances, but also the
principles should be applicable to the majority of appliances in general use.
Generally, the determination of noise levels is only part of a comprehensive testing procedure
covering many aspects of the properties and performances of the appliance. It is therefore
important that the requirements for noise measurements (such as test environment,
instrumentation, and amount of labour involved) be kept at a modest level.
The results of noise measurements are used for many purposes, for example for noise
declaration, as well as for comparing the noise emitted by a specific appliance to the noise
emitted by other appliances of the same family. In other cases, the results are taken as a
basis for engineering action in the development stages of new pieces of equipment, or in
deciding on means for sound insulation. For all purposes, it is important to specify procedures
with known accuracy so that the results of measurements taken by different laboratories can
be compared.
These conditions have, as far as possible, been taken into account in the preparation of this
test code. The acoustic measuring methods are based on those described in
ISO 3743‑1:2010, ISO 3743-2:2018 and ISO 3744:2010.
The adoption of these methods permits the use of hemi-anechoic rooms, special reverberation
test rooms and hard-walled test rooms. The result of the measurements is the sound power
level of the appliance. Within the measuring uncertainty specific to these methods, the results
from the determination under free field conditions over a reflecting plane are equal to those
obtained in reverberant fields.
The use of intensity methods as described in ISO 9614-1:1993, ISO 9614-2:1996, and
ISO 9614-3:2002 is applicable under special conditions, which are described in specific parts
of the IEC 60704-2 series.
This test code is concerned with airborne noise only. In some cases, structure-borne noise,
for example transmitted to the adjoining room, can be of importance.
INTRODUCTION to IEC 60704-2-19:2026
The measuring conditions specified in this document provide for sufficient steadiness in the
noise emitted and reproducibility in different laboratories, whilst simulating as far as possible
the practical use of air cleaners.
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 air cleaners.
NOTE As stated in the introduction to IEC 60704-1, this test code is concerned with airborne noise only.

1 Scope
This part of IEC 60704 applies to stationary freestanding and wall-mounted air cleaners for
domestic and similar use, supplied from mains, d.c. voltage not exceeding 48 V or batteries.
This document includes combination products, where air cleaning is combined with for
example humidification, but can be used only for the air cleaning function.
Fresh-air air cleaners and air cleaners that change their physical location autonomously
without user intervention, are excluded from this document.
By similar use is understood the use in hotels, hospitals, shops, offices, etc.
For determining and verifying noise emission values declared in product specifications, see
IEC 60704-3.
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 (all parts), Household and similar electrical appliances – Test code for the
determination of airborne acoustical noise
IEC 60704-3:2019, Household and similar electrical appliances – Test code for the
determination of airborne acoustical noise – Part 3: Procedure for determining and verifying
declared noise emission values
IEC 61260-1:2014, Electroacoustics – Octave-band and fractional-octave-band filters – Part
1: Specifications
IEC 61672-1:2013, Electroacoustics – Sound level meters – Part 1: Specifications
ISO 3741:2010, Acoustics - Determination of sound power levels and sound energy levels of
noise sources using sound pressure - Precision methods for reverberation test rooms
ISO 3743-1:2010, Acoustics – Determination of sound power levels of noise sources –
Engineering methods for small, movable sources in reverberant fields – Part 1: Comparison
method for hard-walled test rooms
ISO 3743-2:2018, Acoustics – Determination of sound power levels of noise sources using
sound pressure – Engineering methods for small, movable sources in reverberant fields –
Part 2: Methods for special reverberation test rooms
ISO 3744:2010, Acoustics – Determination of sound power levels of noise sources using
sound pressure – Engineering method in an essentially free field over a reflecting plane
ISO 9614-1:1993, Acoustics – Determination of sound power levels of noise sources using
sound intensity – Part 1: Measurement at discrete points
ISO 9614-2:1996, Acoustics – Determination of sound power levels of noise sources using
sound intensity – Part 2: Measurement by scanning
ISO 9614-3:2002, Acoustics – Determination of sound power levels of noise sources using
sound intensity – Part 3: Precision method for measurement by scanning
ISO 6926:2016, Acoustics – Requirements for the performance and calibration of reference
sound sources used for the determination of sound power levels
ISO 12001:1996, Acoustics – Noise emitted by machinery and equipment – Rules for the
drafting and presentation of a noise test code
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. Terms and
definitions pertinent to the determination of sound power levels can be found in ISO 3743-
1:2010, ISO 3743-2:2018 and ISO 3744:2010.
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
3.1
measurement time interval
portion or a multiple of an operational period or operational cycle for which the sound power
levels are determined
3.2
operational period
interval of time during which a specified process is accomplished by the appliance under test
(for example, washing or rinsing or drying for a dishwasher)
3.3
operational cycle
specific sequence of operational periods occurring while the appliance under test performs a
complete work cycle
Note 1 to entry: During the operational cycle, each operational period is associated with a specific process that
can occur only once, or can be repeated (for example, washing and rinsing and drying for a dishwasher).
3.4
time history
continuous recording of the sound pressure level (for a distinct microphone position) as a
function of time, which is obtained during one or more operational periods of an operational
cycle
3.5
reference box
hypothetical right parallelepiped terminating on the reflecting plane(s) on which the noise
source under test is located, that just encloses the source including all the significant sound
radiating components and any test table on which the source is mounted
[SOURCE: ISO 3744:2010, 3.10, modified – The note has been omitted.]
3.6
test enclosure
enclosure used for simulating the typical acoustic built-in or/and mounting conditions
3.101
air cleaner
electrically powered household, or similar, appliance that employs one or multiple
technologies to reduce one or more types of indoor air pollutants
[SOURCE: IEC 63086-1:2020, 3.1]
3.102
fresh-air air cleaner
air cleaner connected to the external environment, which provides pollutant-reduced outdoor
air into an indoor space
Note 1 to entry: The fresh-air air cleaner can also include other auxiliary functions, such as heat exchange.
[SOURCE: IEC 63086-1:2020, 3.3]
3.103
combination products
air cleaner that includes a secondary function besides air cleaning within the same housing,
such as humidifying, dehumidifying, heating, or air conditioning
[SOURCE: IEC 63086-1:2020, 3.4]
3.104
manual operation mode
setting of the device under test chosen by the user which is not influenced by further external
operator interaction, air quality sensor data, and/or timers throughout the duration of the test
[SOURCE: IEC 63086-1:2020, 3.11, modified − "DUT" has been changed to "device under
test", "that" has been changed to "which".]
3.105
maximum performance operation mode
manual operation mode where the device under test is set to the highest flow rate with all air
cleaning functions switched on
[SOURCE: IEC 63086-1:2020, 3.12, modified − "DUT" has been changed to "device under
test", "and set to maximum, where applicable" and the notes to entry have been deleted.]
4 Measurement methods and acoustical environments
4.1 General
This document is concerned with objective methods of engineering accuracy grade 2 in
accordance with ISO 12001:1996 for determining sound power levels L , expressed in
W
decibels (dB), with reference to a sound power of one picowatt (1 pW), of airborne acoustical
noise within the specified frequency range of interest (generally including the octave-bands
with centre frequencies from 125 Hz to 8 000 Hz), and for prescribed operating conditions of
the appliance to be measured.
Methods for determining sound power levels with precision accuracy grade 1 in accordance
with ISO 12001:1996, as specified for example in ISO 3741 and ISO 3745, are not included in
this document. They may, however, be applied if the appropriate test environment and
instrumentation are available.
NOTE 1 The noise values obtained under the described conditions of this document will not necessarily
correspond to the noise experienced under the operational conditions of practical use.
NOTE 2 For quality control during production etc., simplified methods can be appropriate. For noise reduction
purposes, other measurement methods employing, for example, narrow-band analysis or intensity techniques
usually have to be applied. These methods are not covered by this document.
The total noise emitted by machinery or equipment and radiated in all directions to the space
surrounding the machine can be characterized by the sound power of the machine. Within the
accuracy range of this document, the sound power of a machine is basically independent of
the environment in which the machine is installed
Therefore, the concept of sound power level has been chosen for expressing the noise
emission of appliances for household and similar purposes.
The preferred noise emission quantity is the A-weighted sound power level, L , in dB
WA
(re 1 pW).
According to this document, two principal methods exist, the direct method and the
comparison method, as described in 4.2 and 4.3. These two methods can be used
alternatively.
Different types of environments, as described in 4.4, may be used. A part of the IEC 60704-2
series may, if necessary, exclude one or several combinations among those available.
4.2 Direct method
The direct method can be used only for measurements in qualified test environments in
accordance with ISO 3744:2010 for free field conditions over reflecting plane(s), and in
accordance with ISO 3743-2:2018 for special reverberation test rooms.
With this method, the sound power level is determined
– in free field conditions over reflecting plane(s), from time-averaged sound pressure levels
(on a mean-square basis) over the measurement surface and from the area of the
measurement surface, S, or
– in reverberation and special reverberation test rooms, from averaged sound pressure
levels, and from the reverberation time and the volume of the test room.
If for a measurement in a free field, reverberation or special reverberation room is not
possible because the appliance cannot be placed or operated in such an environment, the
intensity method in accordance with ISO 9614-1:1993, ISO 9614-2:1996, and ISO 9614-
3:2002 shall be applied. For the intensity method, the standard deviations given in the parts of
the IEC 60704-2 series and IEC 60704-3:2019 are not applicable unless stated explicitly.
These methods yield results expressed in A-weighted sound power levels (and in octave- or
1/3 octave-band sound power levels, if required) that are calculated directly from measured
sound pressure levels.
NOTE This method can also be used in conjunction with more precise methods, such as those given in ISO 3741
and ISO 3745.
Air cleaners can produce pure tones. If pure tone components are present in the noise
emitted by the source, the estimated standard deviation of the measured sound pressure
levels in the special reverberation room can increase. In such cases, additional microphone
positions or source positions can be necessary, as specified in ISO 3743-2.
4.3 Comparison method
The comparison method for measurement is explicitly described in ISO 3743-1:2010 and in
ISO 3743-2:2018.
NOTE The term "comparison method" is not explicitly given in ISO 3744:2010, but when applying the "absolute
comparison test" for the determination of the environmental correction given in A.3 of ISO 3744:2010, by using a
reference sound source, the procedure is, in fact, a comparison method.
With this method, the sound power level is determined by comparing the averaged values (on
a mean-square basis) of the sound pressure levels produced by the source in the test room to
the averaged values of the sound pressure levels produced in the same room by a calibrated
reference sound source (RSS) of known sound power output, complying with the requirements
of ISO 6926:2016. The difference in sound pressure levels is equal to the difference in sound
power levels when conditions are the same for both sets of measurements.
This method yields results expressed in octave- or 1/3 octave-band sound power levels, and
the A-weighted sound power level is calculated from the octave- or 1/3 octave-band sound
power levels.
To check whether there is a systematic difference between results obtained in different
environments, the use of the comparison method is recommended.
Air cleaners can produce pure tones. If pure tone components are present in the noise
emitted by the source, the estimated standard deviation of the measured sound pressure
levels in the hard-walled test room or in the special reverberation room can increase. In such
cases, additional microphone positions or source positions can be necessary, as specified in
ISO 3741, ISO 3743-1 or ISO 3743-2.
4.4 Acoustical environments
4.4.1 General requirements and criterion for adequacy of the test environment
They are given in the following clauses:
– ISO 3743-1:2010, Clause 4 for hard-walled test rooms,
– ISO 3741:2010, Clause 5 for reverberant rooms,
– ISO 3743-2:2018, Clause 6 for special reverberation test rooms, and
– ISO 3744:2010, Clause 4 for free-field conditions over a reflecting plane.
The methods specified in ISO 3741, ISO 3743-2 and ISO 3744 can be used for measuring
noise emitted by air cleaners. The hard-walled test room specified in ISO 3743-1 is under
consideration.
The method specified in ISO 3744 is applicable to noise sources of any size. When applying
ISO 3743-2, it shall be ensured that the maximum size of the appliance under test fulfils the
requirements specified in ISO 3743-2:2018, Clause 5.
NOTE 101 For free-field conditions over a reflecting plane, the absolute comparison test for the qualification of
the environment, described in ISO 3744:2010, Clause A.2 is preferred.
Guidelines for the design of simple test rooms with free-field conditions are given in Annex C.
Guidelines for the design of a suitable special reverberation test room are given in
ISO 3743-2:2018, Annex B.
4.4.2 Criterion for background noise level
Requirements for the background noise level are given in 4.5 of ISO 3743-1:2010, in 6.5 of
ISO 3743-2:2018 and in 4.2 of ISO 3744:2010. Averaged over the microphone positions, the
background noise level shall be at least 6 dB below, and preferably more than 15 dB below,
the sound pressure level to be measured.
NOTE If the difference between the sound pressure levels of the background noise and the appliance noise is
less than 6 dB, see 8.2.
NOTE 101 Air cleaners can generate very low sound pressure levels. An appropriate background noise level
criterion is considered.
4.4.3 Environmental conditions
Environmental conditions having an adverse effect on the microphone used for the
measurements (for example, strong electric or magnetic fields, wind, impingement of air
discharge from the equipment being tested, high or low temperatures) shall be avoided by
proper selection or positioning of the microphone.
The instructions of the manufacturers of the measurement instruments regarding adverse
environmental conditions shall be followed. The microphone shall always be oriented in such
a way that the angle of incidence of the sound waves is that for which the microphone is
calibrated.
4.5 Measurement uncertainties
4.5.1 General
The estimated values of the standard deviations of reproducibility of sound power levels
determined in accordance with this document are given in 9.1 of ISO 3743-1:2010, in 11.1 of
ISO 3743‑2:2018 and in 9.1 of ISO 3744:2010. But for a particular family of appliances of
similar size with similar operating conditions, the standard deviations of reproducibility can be
smaller than these values. Hence, in the IEC 60704-2 series, standard deviations smaller than
those listed in ISO standards can be stated if substantiation is available from the results of
suitable interlaboratory tests.
In the case of discrepancies between the measurements where the results normally remain
inside the foreseen standard deviation, it can be helpful to perform measurements according
to the upper grade of accuracy: grade 1, laboratory or precision, as described in ISO 3741 or
ISO 3745.
4.5.2 Standard deviations on repeatability and reproducibility and standard
deviations related to declaration and verification
The estimated values of standard deviations of sound power levels determined according to
this document are given in Table 1.
Table 1 – Standard deviations of sound power levels
Standard deviation
dB
σ (repeatability) σ (reproducibility)
r R
0,2 0,6
For the purpose of determining and verifying declared noise emission values according to
IEC 60704-3, the values in Table 2 apply.
Table 2 – Standard deviations for declaration and verification
Standard deviation
dB
σ (production) σ (total) σ (reference)
P t M
0,3 to 1,1 0,7 to 1,3 1,5
5 Instrumentation
5.1 Instrumentation for measuring acoustical data
Requirements for the instrumentation system and for its calibration are given in Clause 5 of
ISO 3743-1:2010, in Clause 7 of ISO 3743-2:2018 and in Clause 5 of ISO 3744:2010.
The instrumentation system shall meet the requirements for a type 1 instrument laid down in
IEC 61672-1:2013, in accordance with the basic standard used. For measurements in octave-
and 1/3 octave-bands, the instrumentation system shall meet the requirements of
IEC 61260‑1:2014.
RSS shall meet the requirements of ISO 6926:2016, and shall be calibrated annually.
The use of windscreens is recommended. If necessary, the observed sound pressure levels
shall be corrected for changes in the microphone sensitivity, in accordance with instructions
accompanying the instrumentation.
5.2 Instrumentation for measuring climatic conditions
5.2.1 The temperature is determined with instruments having an accuracy of ±1 °C.
5.2.2 The relative humidity is determined with instruments having an absolute accuracy of
±2 % within the measuring range.
5.2.3 The absolute air pressure is determined with instruments having an accuracy of
±0,5 kPa.
5.3 Instrumentation for measuring operating conditions
5.3.1 The voltage at the plug of the cable or cord of mains-powered appliances is
measured with voltmeters having an accuracy of class 0,5 instruments.
5.3.2 The voltage at the battery terminals of battery-powered appliances is measured with
voltmeters having an accuracy of class 0,5 instruments.
5.3.3 The rotational speed of motors, attachments, etc. is measured, if necessary, with
speed indicators having an accuracy of ±1 % of full scale.
6 Operation and location of appliances under test
6.1 Equipping and pre-conditioning of appliances
6.1.1 The appliance is equipped with attachments, accessories, etc. as delivered by the
manufacturer for air cleaning.
For noise measurements, clean air filters shall be used.
6.1.2 Care shall be taken to ensure that any auxiliary equipment (such as electrical
conduits or cables, piping for water supply or drainage, air ducts, etc.) necessary for the
operation of the appliance, does not radiate a significant amount of sound into the test
environment or change the sound output of the appliance. Guidelines are given in 6.2 of
ISO 3743-1:2010, in 8.4 of ISO 3743-2:2018 and in 6.2 ISO 3744:2010.
6.1.3 Prior to noise measurements, the air cleaner shall have run in for at least 15 min at
the highest speed.
6.1.4 Immediately before each series of noise measurements, the air cleaner shall run for
at least 60 s to stabilise.
6.2 Supply of electric energy and of water or gas
6.2.1 Appliances with mains powered electric motor(s) are supplied at rated voltage and at
rated frequency. Appliances designed for DC only are supplied with DC. If a voltage range
and/or a frequency range are indicated, then the supply voltage and/or frequency shall be the
nominal system voltage and/or system frequency of the country in which the appliance is
intended to be used. Tolerances shall not exceed ±2 % for voltage and ±1 % for frequency
throughout the test.
The nominal system voltage and its values are defined in IEC 60038:2009.
If the rated voltage of a mains supplied appliance differs from the nominal system voltage as
common in the country of use, measurements should be carried out at the nominal voltage as
common in the country of use.
The supply voltage is measured at the plug of a non-detachable cable or cord, or at the
appliance inlet if a detachable cable is provided, but in no case at the entrance of extension
cables or cords.
6.2.2 Appliances with battery-powered electric motor(s) are started, for noise
measurements, with full-charged batteries as specified by the manufacturer. Verify if the
device after the measurement can still run for at least 9 times the test time from start of the
device until end of the measurement. If this is not possible, the measurement fails.
6.2.3 Any heating function shall be switched off during the test, if possible.
6.2.4 Not applicable.
6.3 Climatic conditions
In general, household appliances (unless otherwise specified for a special family) are
operated under the following climatic conditions:
ambient temperature 18 °C to 28 °C
relative humidity 25 % to 70 %
atmospheric pressure 86 kPa to 106 kPa
6.4 Loading and operating of appliances during tests
6.4.1 General requirements are given in 6.5 of ISO 3743-1:2010, in 8.5 of ISO 3743-
2:2018 and in 6.6 of ISO 3744:2010. For the purpose of establishing a noise test code, the
following guidelines are given, unless otherwise specified in the relevant part of the
IEC 60704-2 series.
In general, the loading and operating conditions should, as far as practicable, simulate normal
use but, in every case, preference has to be given to simple conditions providing satisfactory
repeatability and reproducibility.
The presence of an operator should be avoided. An operator shall be present only if the
application of the load is not practicable without an operator. This operator shall not wear
abnormally sound absorptive clothing that might influence the sound measurements.
6.4.2 The air cleaner sha
...

IEC 60704-2-19 ®
Edition 1.0 2026-01
NORME
INTERNATIONALE
Appareils électrodomestiques et analogues - Code d'essai pour la détermination
du bruit aérien -
Partie 2-19: Exigences particulières pour les épurateurs d'air
ICS 17.140.20; 23.120 ISBN 978-2-8327-1002-9

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC -  IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez
La recherche avancée permet de trouver des publications gratuitement tous les aperçus des publications, symboles
IEC en utilisant différents critères (numéro de référence, graphiques et le glossaire. Avec un abonnement, vous aurez
texte, comité d’études, …). Elle donne aussi des toujours accès à un contenu à jour adapté à vos besoins.
informations sur les projets et les publications remplacées
ou retirées. Electropedia - www.electropedia.org
Le premier dictionnaire d'électrotechnologie en ligne au
IEC Just Published - webstore.iec.ch/justpublished monde, avec plus de 22 500 articles terminologiques en
Restez informé sur les nouvelles publications IEC. Just anglais et en français, ainsi que les termes équivalents
dans 25 langues additionnelles. Egalement appelé
Published détaille les nouvelles publications parues.
Disponible en ligne et une fois par mois par email. Vocabulaire Electrotechnique International (IEV) en ligne.

Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-
nous: sales@iec.ch.
SOMMAIRE
AVANT-PROPOS . 2
INTRODUCTION . 4
1 Domaine d’application . 5
2 Références normatives . 5
3 Termes et définitions . 5
4 Méthodes de mesure et environnements acoustiques . 6
5 Appareillage . 8
6 Fonctionnement et emplacement des appareils en essai . 8
7 Mesure des niveaux de pression acoustique . 10
9 Informations à relever . 11
10 Informations à consigner . 11
Bibliographie . 12

Tableau 1 – Écarts-types des niveaux de puissance acoustique . 7
Tableau 2 – Écarts types pour la déclaration et la vérification . 7

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
__________
Appareils électrodomestiques et analogues -
Code d'essai pour la détermination du bruit aérien -
Partie 2-19: Exigences particulières pour les épurateurs d'air

AVANT-PROPOS
1) La Commission Électrotechnique Internationale (IEC) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de l'IEC). L'IEC a pour objet de
favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de
l'électricité et de l'électronique. À cet effet, l'IEC – entre autres activités – publie des Normes internationales,
des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au public (PAS) et des
Guides (ci-après dénommés "Publication(s) de l'IEC"). Leur élaboration est confiée à des comités d'études, aux
travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les organisations
internationales, gouvernementales et non gouvernementales, en liaison avec l'IEC, participent également aux
travaux. L'IEC collabore étroitement avec l'Organisation Internationale de Normalisation (ISO), selon des
conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de l'IEC concernant les questions techniques représentent, dans la mesure du
possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de l'IEC intéressés
sont représentés dans chaque comité d'études.
3) Les Publications de l'IEC se présentent sous la forme de recommandations internationales et sont agréées
comme telles par les Comités nationaux de l'IEC. Tous les efforts raisonnables sont entrepris afin que l'IEC
s'assure de l'exactitude du contenu technique de ses publications; l'IEC ne peut pas être tenue responsable de
l'éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.
4) Dans le but d'encourager l'uniformité internationale, les Comités nationaux de l'IEC s'engagent, dans toute la
mesure possible, à appliquer de façon transparente les Publications de l'IEC dans leurs publications nationales
et régionales. Toutes divergences entre toutes Publications de l'IEC et toutes publications nationales ou
régionales correspondantes doivent être indiquées en termes clairs dans ces dernières.
5) L'IEC elle-même ne fournit aucune attestation de conformité. Des organismes de certification indépendants
fournissent des services d'évaluation de conformité et, dans certains secteurs, accèdent aux marques de
conformité de l'IEC. L'IEC n'est responsable d'aucun des services effectués par les organismes de certification
indépendants.
6) Tous les utilisateurs doivent s'assurer qu'ils sont en possession de la dernière édition de cette publication.
7) Aucune responsabilité ne doit être imputée à l'IEC, à ses administrateurs, employés, auxiliaires ou mandataires,
y compris ses experts particuliers et les membres de ses comités d'études et des Comités nationaux de l'IEC,
pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre dommage de quelque
nature que ce soit, directe ou indirecte, ou pour supporter les coûts (y compris les frais de justice) et les dépenses
découlant de la publication ou de l'utilisation de cette Publication de l'IEC ou de toute autre Publication de l'IEC,
ou au crédit qui lui est accordé.
8) L'attention est attirée sur les références normatives citées dans cette publication. L'utilisation de publications
référencées est obligatoire pour une application correcte de la présente publication.
9) L'IEC attire l'attention sur le fait que la mise en application du présent document peut entraîner l'utilisation d'un
ou de plusieurs brevets. L'IEC ne prend pas position quant à la preuve, à la validité et à l'applicabilité de tout
droit de brevet revendiqué à cet égard. À la date de publication du présent document, l'IEC n'a pas reçu
notification qu'un ou plusieurs brevets pouvaient être nécessaires à sa mise en application. Toutefois, il y a lieu
d'avertir les responsables de la mise en application du présent document que des informations plus récentes
sont susceptibles de figurer dans la base de données de brevets, disponible à l'adresse https://patents.iec.ch.
L'IEC ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits de brevets.
L'IEC 60704-2-19 a été établie par le sous-comité 59N: Appareils d'épuration d'air électriques
domestiques et appareils similaires, du comité d’études 59 de l’IEC: Aptitude à la fonction des
appareils électrodomestiques et analogues. Il s'agit d'une Norme internationale.
Le texte de cette Norme internationale est issu des documents suivants:
Projet Rapport de vote
59N/87/FDIS 59N/89/RVD
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à son approbation.
La langue employée pour l'élaboration de cette Norme internationale est l'anglais.
Ce document a été rédigé selon les Directives ISO/IEC, Partie 2, il a été développé selon les
Directives ISO/IEC, Partie 1 et les Directives ISO/IEC, Supplément IEC, disponibles sous
www.iec.ch/members_experts/refdocs. Les principaux types de documents développés par
l'IEC sont décrits plus en détail sous www.iec.ch/publications.
La présente Partie 2-19 est destinée à être utilisée conjointement avec l'IEC 60704-1:2021
Appareils électrodomestiques et analogues - Code d'essai pour la détermination du bruit
aérien - Partie 1: Exigences générales.
Le texte correspondant de l’IEC 60704-1:2021 modifié par la présente publication établit le code
d'essai pour les épurateurs d'air.
La présente Partie 2-19 complète ou modifie les articles correspondants de l'IEC 60704-1:2021.
Lorsqu'un paragraphe particulier de l’IEC 60704-1:2021 n'est pas mentionné dans le présent
document, ce paragraphe s'applique pour autant que cela soit raisonnable. Lorsque la présente
norme mentionne "addition", "modification", "remplacement" ou "suppression", il convient
d'adapter les exigences, modalités d'essai ou commentaires correspondants de l’IEC 60704-1
en conséquence.
Les paragraphes et tableaux qui s'ajoutent à ceux de l’IEC 60704-1 sont numérotés à partir
de 101.
À l’exception de celles qui sont dans un nouveau paragraphe ou de celles qui concernent des
notes de l’IEC 60704-1, les notes sont numérotées à partir de 101, y compris celles des articles
ou paragraphes qui sont remplacés.
Dans la présente norme, les caractères d'imprimerie suivants sont utilisés:
– termes définis à l'Article 3: en caractères gras.
Une liste de toutes les parties de la série IEC 60704, publiées sous le titre général Appareils
électrodomestiques et analogues – Code d'essai pour la détermination du bruit aérien, peut
être consultée sur le site web de l'IEC.
Le comité a décidé que le contenu de ce document ne sera pas modifié avant la date de stabilité
indiquée sur le site web de l'IEC sous webstore.iec.ch dans les données relatives au document
recherché. À cette date, le document sera
– reconduit,
– supprimé, ou
– révisé.
INTRODUCTION
Les conditions de mesure spécifiées dans le présent document donnent une stabilité suffisante
du bruit émis ainsi que la reproductibilité dans différents laboratoires, tout en simulant autant
que possible l'usage réel des épurateurs d'air.
Il est recommandé d'envisager la détermination des niveaux de bruit dans le cadre d'une
procédure d'essai complète qui couvre de nombreux aspects des propriétés et caractéristiques
d'aptitude à la fonction des épurateurs d'air.
NOTE Comme indiqué dans l'introduction de l'IEC 60704-1, le présent code d'essai concerne uniquement le bruit
aérien.
1 Domaine d’application
Remplacement:
La présente partie de l'IEC 60704 s'applique aux épurateurs d'air autoportants fixes et aux
épurateurs d'air fixés au mur pour usages domestiques et analogues, alimentés à partir du
réseau, en tension continue inférieure à 48 V ou par piles ou accumulateurs.
Le présent document couvre les produits mixtes pour lesquels l'épuration d'air est combinée,
par exemple, avec l'humidification de l'air, mais qui peuvent être utilisés seulement pour la
fonction d'épu
...

IEC 60704-2-19 ®
Edition 1.0 2026-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances - Test code for the determination of
airborne acoustical noise -
Part 2-19: Particular requirements for air cleaners

Appareils électrodomestiques et analogues - Code d'essai pour la détermination
du bruit aérien -
Partie 2-19: Exigences particulières pour les épurateurs d'air
ICS 17.140.20, 23.120 ISBN 978-2-8327-1002-9

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
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

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 - IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Discover our powerful search engine and read freely all the
The advanced search enables to find IEC publications by a publications previews, graphical symbols and the glossary.
variety of criteria (reference number, text, technical With a subscription you will always have access to up to date
committee, …). It also gives information on projects, content tailored to your needs.

replaced 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 22 500 terminological entries in English
details all new publications released. Available online and and French, with equivalent terms in 25 additional languages.
once 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.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC -  IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez
La recherche avancée permet de trouver des publications gratuitement tous les aperçus des publications, symboles
IEC en utilisant différents critères (numéro de référence, graphiques et le glossaire. Avec un abonnement, vous aurez
texte, comité d’études, …). Elle donne aussi des toujours accès à un contenu à jour adapté à vos besoins.
informations sur les projets et les publications remplacées
ou retirées. Electropedia - www.electropedia.org
Le premier dictionnaire d'électrotechnologie en ligne au
IEC Just Published - webstore.iec.ch/justpublished monde, avec plus de 22 500 articles terminologiques en
Restez informé sur les nouvelles publications IEC. Just anglais et en français, ainsi que les termes équivalents
Published détaille les nouvelles publications parues. dans 25 langues additionnelles. Egalement appelé
Disponible en ligne et une fois par mois par email. Vocabulaire Electrotechnique International (IEV) en ligne.

Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-
nous: sales@iec.ch.
CONTENTS
FOREWORD . 2
INTRODUCTION . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
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
9 Information to be recorded . 11
10 Information to be reported . 11
Bibliography . 12

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 2-19: Particular requirements for air cleaners

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 60704-2-19 has been prepared by subcommittee 59N: Electrical air cleaners for household
and similar purposes, of IEC technical committee 59: Performance of household and similar
electrical appliances. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
59N/87/FDIS 59N/89/RVD
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 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.
This Part 2-19 is intended to be used in conjunction with 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 air cleaners.
This Part 2-19 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 document, that subclause
is applicable as far as reasonable. Where this standard states "addition", "modification",
"replacement" or "deletion", the relevant requirements, test specifications or explanatory matter
in IEC 60704-1 should be adapted accordingly.
Subclauses and tables that are additional to those in IEC 60704-1 are numbered starting
from 101.
Unless notes are in a new subclause or involve notes in IEC 60704-1, they are numbered
starting from 101, including those in a replaced clause or subclause.
In this standard, the following print types are used:
– terms defined in Clause 3: bold type.
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.
INTRODUCTION
The measuring conditions specified in this document provide for sufficient steadiness in the
noise emitted and reproducibility in different laboratories, whilst simulating as far as possible
the practical use of air cleaners.
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 air cleaners.
NOTE As stated in the introduction to IEC 60704-1, this test code is concerned with airborne noise only.

1 Scope
Replacement:
This part of IEC 60704 applies to stationary freestanding and wall-mounted air cleaners for
domestic and similar use, supplied from mains, d.c. voltage not exceeding 48 V or batteries.
This document includes combination products, where air cleaning is combined with for
example humidification, but can be used only for the air cleaning function.
Fresh-air air cleaners and air cleaners that change their physical location autonomously
without user intervention, are excluded from this document.
By similar use is understood the use in hotels, hospitals, shops, offices, etc.
For determining and verifying noise emission values declared in product specifications, see
IEC 60704-3.
2 Normative references
Addition:
ISO 3741:2010, Acoustics - Determination of sound power levels and sound energy levels of
noise sources using sound pressure - Precision methods for reverberation test rooms
3 Terms and definitions
Addition:
3.101
air cleaner
electrically powered household, or similar, appliance that employs one or multiple technologies
to reduce one or more types of indoor air pollutants
[SOURCE: IEC 63086-1:2020, 3.1]
3.102
fresh-air air cleaner
air cleaner connected to the external environment, which provides pollutant-reduced outdoor
air into an indoor space
Note 1 to entry: The fresh-air air cleaner can also include other auxiliary functions, such as heat exchange.
[SOURCE: IEC 63086-1:2020, 3.3]
3.103
combination products
air cleaner that includes a secondary function besides air cleaning within the same housing,
such as humidifying, dehumidifying, heating, or air conditioning
[SOURCE: IEC 63086-1:2020, 3.4]
3.104
manual operation mode
setting of the device under test chosen by the user which is not influenced by further external
operator interaction, air quality sensor data, and/or timers throughout the duration of the test
[SOURCE: IEC 63086-1:2020, 3.11, modified − "DUT" has been changed to "device under test",
"that" has been changed to "which".]
3.105
maximum performance operation mode
manual operation mode where the device under test is set to the highest flow rate with all air
cleaning functions switched on
[SOURCE: IEC 63086-1:2020, 3.12, modified − "DUT" has been changed to "device under test",
"and set to maximum, where applicable" and the notes to entry have been deleted.]
4 Measurement methods and acoustical environments
4.2 Direct method
Addition:
Air cleaners can produce pure tones. If pure tone components are present in the noise emitted
by the source, the estimated standard deviation of the measured sound pressure levels in the
special reverberation room can increase. In such cases, additional microphone positions or
source positions can be necessary, as specified in ISO 3743-2.
4.3 Comparison method
Addition:
Air cleaners can produce pure tones. If pure tone components are present in the noise emitted
by the source, the estimated standard deviation of the measured sound pressure levels in the
hard-walled test room or in the special reverberation room can increase. In such cases,
additional microphone positions or source positions can be necessary, as specified in ISO 3741,
ISO 3743-1 or ISO 3743-2.
4.4 Acoustical environments
4.4.1 General requirements and criterion for adequacy of the test environment
Replacement:
They are given in the following clauses:
– ISO 3743-1:2010, Clause 4 for hard-walled test rooms,
– ISO 3741:2010, Clause 5 for reverberant rooms,
– ISO 3743-2:2018, Clause 6 for special reverberation test rooms, and
– ISO 3744:2010, Clause 4 for free-field conditions over a reflecting plane.
The methods specified in ISO 3741, ISO 3743-2 and ISO 3744 can be used for measuring noise
emitted by air cleaners. The hard-walled test room specified in ISO 3743-1 is under
consideration.
The method specified in ISO 3744 is applicable to noise sources of any size. When applying
ISO 3743-2, it shall be ensured that the maximum size of the appliance under test fulfils the
requirements specified in ISO 3743-2:2018, Clause 5.
NOTE 101 For free-field conditions over a reflecting plane, the absolute comparison test for the qualification of the
environment, described in ISO 3744:2010, Clause A.2 is preferred.
Guidelines for the design of simple test rooms with free-field conditions are given in Annex C.
Guidelines for the design of a suitable special reverberation test room are given in
ISO 3743-2:2018, Annex B.
4.4.2 Criterion for background noise level
Addition:
NOTE 101 Air cleaners can generate very low sound pressure levels. An appropriate background noise level
criterion is considered.
4.5 Measurement uncertainties
4.5.2 Standard deviations on repeatability and reproducibility and standard deviations
related to declaration and verification
Replacement:
The estimated values of standard deviations of sound power levels determined according to
this document are given in Table 1.
Table 1 – Standard deviations of sound power levels
Standard deviation
dB
σ (repeatability) σ (reproducibility)
r R
0,2 0,6
For the purpose of determining and verifying declared noise emission values according to
IEC 60704-3, the values in Table 2 apply.
Table 2 – Standard deviations for declaration and verification
Standard deviation
dB
σ (production) σ (total) σ (reference)
P t M
0,3 to 1,1 0,7 to 1,3 1,5
5 Instrumentation
5.1 Instrumentation for measuring acoustical data
Addition:
The use of windscreens is recommended. If necessary, the observed sound pressure levels
shall be corrected for changes in the microphone sensitivity, in accordance with instructions
accompanying the instrumentation.
6 Operation and location of appliances under test
6.1 Equipping and pre-conditioning of appliances
6.1.1
Replacement:
The appliance is equipped with attachments, accessories, etc. as delivered by the manufacturer
for air cleaning.
For noise measurements, clean air filters shall be used.
6.1.3
Replacement:
Prior to noise measurements, the air cleaner shall have run in for at least 15 min at the highest
speed.
6.1.4
Replacement:
Immediately before each series of noise measurements, the air cleaner shall run for at least
60 s to stabilise.
6.2 Supply of electric energy and of water or gas
6.2.2
Replacement:
Appliances with battery-powered electric motor(s) are started, for noise measurements, with
full-charged batteries as specified by the manufacturer. Verify if the device after the
measurement can still run for at least 9 times the test time from start of the device until end of
the measurement. If this is not possible, the measurement fails.
6.2.3
Replacement:
Any heating function shall be switched off during the test, if possible.
6.2.4 Not applicable.
6.4 Loading and operating of appliances during tests
6.4.2
Replacement:
The air cleaner shall be set to its maximum performance operation mode. Additional
functions like heating, cooling, humidification, dehumidification or similar shall be switched off.
NOTE 101 Additionally, other settings can be measured.
All tanks necessary for functions not used during the test shall be empty.
6.4.3
Replacement:
If the air cleaner is equipped with a mechanism to oscillate the direction of the inlet or outlet
or both, this mechanism shall not be activated.
NOTE 101 A measurement with the oscillation mechanism activated can be done in addition.
6.5 Location and mounting of appliances
6.5.2
Replacement:
The air cleaner is placed directly on the floor without any resilient means other than those
incorporated in the appliance:
– either on the floor of the hard-walled test room or of the special reverberation test room with
a minimum distance of 1 m between any surface (including protruding parts) of the appliance
and the nearest wall;
– or on the reflecting plane of the free field environment, taking into account the shape and
size of the specified measurement surface.
Tabletop air cleaners are placed on the floor similar to floor standing air cleaners.
6.5.3 Not applicable.
6.5.4 Not applicable.
6.5.5
Replacement:
Wall-mounted appliances shall be mounted in accordance with the manufacturer’s instructions
either directly or with a mounting board at a vertical wall
– either at the hard-walled test room or of the special reverberation test room at one vertical
wall and with a minimum distance of 1 m between any surface (including protruding parts)
of the air cleaner and the nearest other wall;
– or at the vertical reflecting plane. The minimum size of this vertical plane shall be at least
equal to the size of the projection of the measurement surface. The acoustic absorption
coefficient of the vertical reflecting plane shall be smaller than 0,06 in the frequency range
of interest.
It shall be ensured that any influence onto the airflow of the appliance by the way of mounting
is avoided.
It shall be ensured that any airborne noise emitted by the mounting board or the vertical wall
on which the appliance is mounted is avoided.
6.5.6 Not applicable.
7 Measurement of sound pressure levels
7.1 Microphone array, measurement surface and RSS location for essentially free
field conditions over reflecting plane(s)
7.1.1 Addition:
For air cleaners with a reference box not exceeding 0,7 m, both measurement surfaces in
accordance with 7.1.2 and 7.1.5 are allowed.
NOTE 101 Tests have proven that the results with both measurement surfaces are equivalent.
7.1.3 Addition:
This microphone array shall be used for wall-mounted appliances only.
7.1.4 Not applicable.
7.1.6 Not applicable.
7.1.7 Not applicable.
7.4 Measurements
7.4.1
Addition:
The air cleaner is switched on. The measurement starts after any user interface sound has
stopped and the air cleaner reaches a stable operation in accordance with 6.1.4. The
measurement stops after 60 s from the start of the measurement.
The A-weighted time averaged sound pressure level shall be measured during the measurement
time.
If the air cleaner is measured with activated mechanism to oscillate the direction of the inlet or
outlet or both, the measurement stops after 5 complete cycles of the oscillating motion. If these
cycles are reached wi
...