IEC 60704-2-19:2026
(Main)Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-19: Particular requirements for air cleaners
Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-19: Particular requirements for air cleaners
IEC 60704-2-19:2026 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.
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.
Appareils électrodomestiques et analogues - Code d'essai pour la détermination du bruit aérien - Partie 2-19 : Exigences particulières pour les épurateurs d'air
L'IEC 60704-2-19:2026 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'épuration d'air. 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.
General Information
- Status
- Published
- Publication Date
- 29-Jan-2026
- Technical Committee
- SC 59N - Electrical air cleaners for household and similar purposes
- Drafting Committee
- JWG 2 - TC 59/JWG 2
- Current Stage
- PPUB - Publication issued
- Start Date
- 30-Jan-2026
- Completion Date
- 20-Feb-2026
IEC 60704-2-19:2026 - Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-19: Particular requirements for air cleaners Released:30. 01. 2026 Isbn:9782832710029
IEC 60704-2-19:2026 - Appareils électrodomestiques et analogues - Code d'essai pour la détermination du bruit aérien - Partie 2-19 : Exigences particulières pour les épurateurs d'air Released:30. 01. 2026 Isbn:9782832710029
IEC 60704-2-19:2026 - Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-19: Particular requirements for air cleaners Released:30. 01. 2026 Isbn:9782832710029
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Frequently Asked Questions
IEC 60704-2-19:2026 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-19: Particular requirements for air cleaners". This standard covers: IEC 60704-2-19:2026 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. 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.
IEC 60704-2-19:2026 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. 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.
IEC 60704-2-19:2026 is classified under the following ICS (International Classification for Standards) categories: 17.140.20 - Noise emitted by machines and equipment; 23.120 - Ventilators. Fans. Air-conditioners. The ICS classification helps identify the subject area and facilitates finding related standards.
IEC 60704-2-19:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
IEC 60704-2-19 ®
Edition 1.0 2026-01
INTERNATIONAL
STANDARD
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 978-2-8327-1002-9
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.
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.
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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
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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
...
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
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Switzerland
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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
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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,
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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
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
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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
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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)
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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
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