EN IEC 61591:2023
(Main)Cooking fume extractors - Methods for measuring performance
Cooking fume extractors - Methods for measuring performance
IEC 61591:2023 applies to cooking fume extractors incorporating a fan for the recirculation or extraction mode situated in a household kitchen. It can also be used for cooking fume extractors where the fan is mounted separately from the appliance, but controlled by the appliance when the fan is defined in the technical documentation (e.g. name plate data) and instructions for installation. This document deals also with down-draft systems arranged beside, behind or under the cooking appliance. This document defines the main performance characteristics of these appliances, which are of interest to the user, and specifies methods for measuring these characteristics. This document does not specify a classification or ranking for performance. This document does not deal with safety requirements that are in accordance with IEC 60335-1 and IEC 60335-2-31. Cooking fume extractors without fans operated by a central ventilation system are covered in EN 13141-3. This third edition cancels and replaces the second edition published in 2019. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) new definition of working point, see 3.19; b) new definition for lowest setting and automatic setting, see 3.17 and 3.18; c) revised requirements for installation and positioning, see 6.2; d) added a normative reference ISO 5801 for the specification of the pressure compensation chamber, see Clause 10; e) separate clauses for determining the volumetric airflow and fluid dynamic efficiency, see Clauses 10 and 11; f) new approach for determining the fluid dynamic efficiency ("9-point calculation"); g) new definitions, new clause and new Annex B regarding the measurement of low-power modes; h) new Annex A: assumption for the parameter b.
Absauger für Kochdünste - Verfahren zur Messung der Gebrauchseigenschaft
Extracteurs de fumée de cuisine - Méthodes de mesure de l'aptitude à la fonction
L'IEC 61591:2023 s’applique aux extracteurs de fumée de cuisine comportant un ventilateur pour le mode recyclage ou extraction, installés dans une cuisine à usage domestique. Il peut également être utilisé pour les extracteurs de fumée de cuisine lorsque le ventilateur est monté séparément de l’appareil, mais est commandé par celui-ci lorsqu’il est mentionné dans la documentation technique (données inscrites sur la plaque signalétique, par exemple) et dans les instructions d’installation. Le présent document couvre également les extracteurs verticaux installés à côté, à l’arrière ou au-dessous de l’appareil de cuisson. Le présent document définit les caractéristiques de performance principales de ces appareils qui sont pertinentes pour l’utilisateur et spécifie les méthodes de mesure de ces caractéristiques. Le présent document ne spécifie pas un système de classement pour l’aptitude à la fonction de ces appareils. Le présent document ne traite pas des exigences de sécurité qui sont conformes aux normes IEC 60335-1 et IEC 60335-2-31. Les extracteurs de fumée de cuisine sans ventilateur actionnés par un système de ventilation centralisé sont couverts par l’EN 13141-3. Cette troisième édition annule et remplace la deuxième édition parue en 2019. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: a) redéfinition du terme "point de fonctionnement" (voir 3.20); b) redéfinition des termes "réglage le plus bas" et "réglage automatique" (voir 3.23 et 3.24); c) révision des exigences concernant l’installation et le positionnement (voir 6.2); d) ajout de la référence normative ISO 5801 pour la spécification de la chambre de compensation de pression (voir Article 10); e) création d’articles distincts concernant la détermination du débit d’air volumétrique et du rendement dynamique des fluides (voir Articles 10 et 11); f) nouvelle approche concernant la détermination du rendement dynamique des fluides ("calcul en 9 points"); g) nouvelles définitions, nouvel article et nouvelle Annexe B concernant la mesure des modes faible puissance; h) nouvelle Annexe A: hypothèse formulée pour le paramètre b.
Odvajalniki kuhinjskih hlapov - Metode za merjenje lastnosti (IEC 61591:2023)
Standard IEC 61591:2023 se uporablja za odvajalnike kuhinjskih hlapov z vgrajenim ventilatorjem za način recirkulacije ali odsesavanja, nameščene v kuhinji. Uporabiti ga je mogoče tudi za odvajalnike kuhinjskih hlapov, pri katerih je ventilator nameščen ločeno od aparata, vendar ga aparat upravlja, če je ventilator opredeljen v tehnični dokumentaciji (npr. podatki na napisni ploščici) in navodilih za namestitev. Ta dokument prav tako obravnava sisteme podvleke, ki so nameščeni ob kuhalnem aparatu oziroma za ali pod njim. Ta dokument določa glavne značilnosti delovanja teh aparatov, ki zanimajo uporabnika, ter metode za merjenje teh značilnosti. Ta dokument ne določa zahtev za razvrščanje na podlagi delovanja. Ta dokument ne obravnava varnostnih zahtev iz standardov IEC 60335-1 in IEC 60335-2-31. Odvajalniki kuhinjskih hlapov brez ventilatorjev, ki jih upravlja osrednji prezračevalni sistem, so zajeti v standardu EN 13141-3. Tretja izdaja razveljavlja in nadomešča drugo izdajo, objavljeno leta 2019. Ta izdaja je tehnično popravljena izdaja.
Ta izdaja v primerjavi s prejšnjo vključuje naslednje pomembne tehnične spremembe:
a) novo opredelitev delovne točke, glej točko 3.19;
b) novo opredelitev najnižje nastavitve in samodejne nastavitve, glej točki 3.17 in 3.18;
c) spremenjene zahteve za namestitev in postavitev, glej točko 6.2;
d) dodano zvezo s standardom ISO 5801 za specifikacijo komore za izravnavo tlaka, glej točko 10;
e) ločene točke za določanje volumetričnega pretoka zraka in učinkovitosti pretoka zraka, glej točki 10 in 11;
f) nov pristop za določanje učinkovitosti pretoka zraka (»9-točkovni izračun«);
g) nove opredelitve, novo točko in nov dodatek B v zvezi z merjenjem načinov nizke porabe;
h) nov dodatek A: predpostavka za parameter b.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2023
Odvajalniki kuhinjskih hlapov - Metode za merjenje lastnosti (IEC 61591:2023)
Cooking fume extractors - Methods for measuring performance (IEC 61591:2023)
Absauger für Kochdünste - Verfahren zur Messung der Gebrauchseigenschaft (IEC
61591:2023)
Extracteurs de fumée de cuisine - Méthodes de mesure de l'aptitude à la fonction (IEC
61591:2023)
Ta slovenski standard je istoveten z: EN IEC 61591:2023
ICS:
97.040.20 Štedilniki, delovni pulti, Cooking ranges, working
pečice in podobni aparati tables, ovens and similar
appliances
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 61591
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2023
ICS 97.040.20 Supersedes EN IEC 61591:2020;
EN IEC 61591:2020/A11:2020
English Version
Cooking fume extractors - Methods for measuring performance
(IEC 61591:2023)
Extracteurs de fumée de cuisine - Méthodes de mesure de Absauger für Kochdünste - Verfahren zur Messung der
l'aptitude à la fonction Gebrauchseigenschaft
(IEC 61591:2023) (IEC 61591:2023)
This European Standard was approved by CENELEC on 2023-05-01. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61591:2023 E
European foreword
The text of document 59K/352/CDV, future edition 3 of IEC 61591, prepared by SC 59K "Performance
of household and similar electrical cooking appliances" of IEC/TC 59 "Performance of household and
similar electrical appliances" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 61591:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-02-01
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-05-01
document have to be withdrawn
This document supersedes EN IEC 61591:2020 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61591:2023 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60335-1 NOTE Approved as EN 60335-1
IEC 60335-2-31 NOTE Approved as EN 60335-2-31
IEC 60704-3 NOTE Approved as EN 60704-3
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60584-1 - Thermocouples - Part 1: EMF EN 60584-1 -
specifications and tolerances
IEC 60704-2-13 - Household and similar electrical appliances EN 60704-2-13 -
- Test code for the determination of
airborne acoustical noise - Part 2-13:
Particular requirements for range hoods
and other cooking fume extractors
IEC 60751 - Industrial platinum resistance EN IEC 60751 -
thermometers and platinum temperature
sensors
IEC 62301 2011 Household electrical appliances - EN 50564 2011
Measurement of standby power
1 2
IEC 63474 — Electrical and electronic household and EN IEC 63474 —
office equipment - Measurement of
networked standby power consumption of
edge equipment
ISO 5167-1 - Measurement of fluid flow by means of EN ISO 5167-1 -
pressure differential devices inserted in
circular cross-section conduits running full -
Part 1: General principles and
requirements
ISO 5167-2 - Measurement of fluid flow by means of EN ISO 5167-2 -
pressure differential devices inserted in
circular cross-section conduits running full -
Part 2: Orifice plates
ISO 5167-3 - Measurement of fluid flow by means of EN ISO 6157-3 -
pressure differential devices inserted in
circular cross-section conduits running full -
Part 3: Nozzles and Venturi nozzles
Under preparation. Stage at the time of publication: IEC CDV 63474:2022.
Under preparation. Stage at the time of publication: prEN IEC 63474:2022.
ISO 5167-4 - Measurement of fluid flow by means of EN ISO 5167-4 -
pressure differential devices inserted in
circular cross-section conduits running full -
Part 4: Venturi tubes
ISO 5801 2017 Fans - Performance testing using EN ISO 5801 2017
standardized airways
ISO 80000-1 2009 Quantities and units - Part 1: General - -
IEC 61591 ®
Edition 3.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cooking fume extractors – Methods for measuring performance
Extracteurs de fumée de cuisine – Méthodes de mesure de l’aptitude à la
fonction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.040.20 ISBN 978-2-8322-6665-6
– 2 – IEC 61591:2023 © IEC 2023
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Classification . 10
5 List of measurements . 10
6 General conditions for measurements . 10
6.1 Test room . 10
6.2 Installation and positioning . 10
6.3 Electricity supply . 11
6.4 Filters . 11
6.5 Fan control . 11
6.6 Instrumentation and measurements . 12
7 Dimensions and mass . 12
7.1 Overall dimensions . 12
7.2 Distance between cooking fume extractor and cooking appliance. 13
7.3 Mass . 13
8 Power measurement of low-power modes . 13
8.1 Purpose and combination of appliances . 13
8.2 Measurement . 13
8.2.1 Principles . 13
8.2.2 Determination of power consumption in off mode . 14
8.2.3 Determination of power consumption in standby mode . 14
8.2.4 Determination of consumption in standby mode in condition of
networked standby . 14
9 Airborne acoustical noise . 15
10 Volumetric airflow . 15
10.1 Purpose and test set up . 15
10.2 Measurement of the volumetric airflow . 17
10.3 Calculation of the volumetric airflow . 18
11 Fluid dynamic efficiency . 18
11.1 Purpose . 18
11.2 Determining the working points . 18
11.3 Calculation of the fluid dynamic efficiency (FDE) . 20
11.3.1 Conversion to reference air density . 20
11.3.2 Calculating the corrected working points WP . 21
C
sj,
11.3.3 Calculating the fluid dynamic efficiency (FDE) . 22
12 Effectiveness of the lighting system . 23
12.1 Purpose . 23
12.2 Measurement . 23
12.3 Assessment . 24
13 Odour reduction . 24
13.1 Purpose . 24
13.2 Measuring setup . 24
13.3 Measurement . 26
IEC 61591:2023 © IEC 2023 – 3 –
13.4 Calculation of the odour reduction factor . 26
14 Grease absorption . 27
14.1 Purpose . 27
14.2 Measuring setup . 27
14.3 Preparation . 30
14.3.1 Determining the mass . 30
14.3.2 Warm-up period . 31
14.3.3 Determining the working point WP . 31
14.4 Measurement . 31
14.5 Assessment . 31
Annex A (informative) Assumption for the parameter b (see Table 3) . 33
Annex B (normative) Low power mode measurements . 34
Bibliography . 35
Figure 1 – Measurement of airflow . 16
Figure 2 – 9 working points of a cooking fume extractor in extraction mode (example) . 19
Figure 3 – Measurement points for assessing the effectiveness of the lighting system . 24
Figure 4 – Example of a test room . 25
Figure 5 – Chamber for the grease absorption of a range hood or a microwave hood
combination . 29
Figure 6 – Chamber for the grease absorption of a down-draft system . 29
Figure 7 – Cookware used for measuring the grease absorption . 30
Figure A.1 – Typical ducting. 33
Table 1 – Instruments . 12
Table 2 – Measurements . 12
Table 3 – Parameters for the calculation of resistance curves – . 17
Table 4 – Relevant measurement points for assessing the effectiveness of the lighting
system . 23
Table B.1 – Step by step instruction for measuring low power modes . 34
– 4 – IEC 61591:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COOKING FUME EXTRACTORS –
METHODS FOR MEASURING PERFORMANCE
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 61591 has been prepared by subcommittee 59K: Performance of household and similar
electrical cooking appliances, of IEC technical committee 59: Performance of household and
similar electrical appliances. It is an International Standard.
This third edition cancels and replaces the second edition published in 2019. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) new definition of working point, see 3.19;
b) new definition for lowest setting and automatic setting, see 3.17 and 3.18;
c) revised requirements for installation and positioning, see 6.2;
d) added a normative reference ISO 5801 for the specification of the pressure compensation
chamber, see Clause 10;
e) separate clauses for determining the volumetric airflow and fluid dynamic efficiency, see
Clauses 10 and 11;
f) new approach for determining the fluid dynamic efficiency ("9-point calculation");
IEC 61591:2023 © IEC 2023 – 5 –
g) new definitions, new clause and new Annex B regarding the measurement of low-power
modes;
h) new Annex A: assumption for the parameter b.
The text of this International Standard is based on the following documents:
Draft Report on voting
59K/352/CDV 59K/361/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This 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.
In this standard, the following print types are used:
– terms listed in Clause 3: Arial bold.
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,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
– 6 – IEC 61591:2023 © IEC 2023
COOKING FUME EXTRACTORS –
METHODS FOR MEASURING PERFORMANCE
1 Scope
This document applies to cooking fume extractors incorporating a fan for the recirculation
or extraction mode situated in a household kitchen.
It can also be used for cooking fume extractors where the fan is mounted separately from the
appliance, but controlled by the appliance when the fan is defined in the technical
documentation (e.g. name plate data) and instructions for installation.
This document deals also with down-draft systems arranged beside, behind or under the
cooking appliance.
This document defines the main performance characteristics of these appliances, which are of
interest to the user, and specifies methods for measuring these characteristics.
This document does not specify a classification or ranking for performance.
NOTE 1 This document does not deal with safety requirements that are in accordance with IEC 60335-1 and
IEC 60335-2-31.
NOTE 2 Cooking fume extractors without fans operated by a central ventilation system are covered in EN 13141-3.
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 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
IEC 60704-2-13, Household and similar electrical appliances – Test code for the determination
of airborne acoustical noise – Part 2-13: Particular requirements for range hoods and other
cooking fume extractors
IEC 60751, Industrial platinum resistance thermometers and platinum temperature sensors
IEC 62301:2011, Household electrical appliances – Measurement of standby power
IEC 63474:— , Electrical and electronic household and office equipment – Measurement of
networked standby power consumption of edge equipment
ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in
circular cross-section conduits running full – Part 1: General principles and requirements
ISO 5167-2, Measurement of fluid flow by means of pressure differential devices inserted in
circular cross-section conduits running full – Part 2: Orifice plates
__________
Under preparation. Stage at the time of development: IEC CDV 63474:2022.
IEC 61591:2023 © IEC 2023 – 7 –
ISO 5167-3, Measurement of fluid flow by means of pressure differential devices inserted in
circular cross-section conduits running full – Part 3: Nozzles and Venturi nozzles
ISO 5167-4, Measurement of fluid flow by means of pressure differential devices inserted in
circular cross-section conduits running full – Part 4: Venturi tubes
ISO 5801:2017, Fans – Performance testing using standardized airways
ISO 80000-1:2009, Quantities and units – Part 1: General
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
active mode
mode in which the appliance is connected to a mains power source, has been activated, and is
performing any of the intended functions
EXAMPLE Intended functions are running the fan or operating the lighting system.
Note 1 to entry: Associated activities include displaying information, software download, sensor controlled
automatic mode and communication with the hob.
3.2
cooking fume extractor
CFE
appliance with fan and filter intended to collect and treat cooking fumes, which can be operated
in recirculation mode or extraction mode
3.3
range hood
cooking fume extractor installed over a cooking appliance
3.3.1
wall range hood
range hood mounted to the wall
3.3.2
island range hood
range hood mounted to the ceiling
3.3.3
ceiling range hood
range hood integrated onto or into the ceiling
3.3.4
built-in range hood
range hood mounted onto or into a cabinet
– 8 – IEC 61591:2023 © IEC 2023
3.4
microwave hood combination
cooking fume extractor integrated in a microwave oven
3.5
multiple combination hood
cooking fume extractor where the fan is mounted separately of the appliance, but controlled
by the appliance
3.6
down-draft system
cooking fume extractor intended for installation adjacent to a cooking appliance or integrated
in a cooking appliance that draws vapour down into a duct
Note 1 to entry: A down-draft system can also be a system where the fan is mounted separately from the appliance
but controlled by the appliance.
3.7
recirculation mode
mode of a cooking fume extractor that discharges air back into the room, which includes an
odour-reduction filter
3.8
extraction mode
vented mode
ducted mode
mode of a cooking fume extractor that discharges the air to the outside of the building by
means of ducting
Note 1 to entry: Extraction mode is also known as "vented mode" or "ducted mode".
3.9
rated voltage
voltage assigned to the cooking fume extractor by the manufacturer
3.10
grease absorption factor
G
FE
percentage of grease retained within a grease filter
3.11
grease filter
components for absorbing grease, which are intended to be replaced or removed for cleaning
without tools
3.12
odour-reduction filter
components for reducing odour
3.13
odour reduction factor
capability of the cooking fume extractor to reduce odours
3.14
odour dispersion time
time taken to reduce odours to a defined level after the odour generating source has been
switched off
IEC 61591:2023 © IEC 2023 – 9 –
3.15
highest continuous setting for normal use
control setting of cooking fume extractor at highest speed, excluding the boost position
setting
Note 1 to entry: Marked setting on the appliance, which is described in the instructions for use.
3.16
boost position setting
marked control setting at maximum fan speed, which is automatically limited in duration
Note 1 to entry: Marked setting on the appliance, which is described in the instructions for use.
3.17
lowest setting
marked control setting at which the cooking fume extractor operates at its lowest speed
3.18
automatic setting
control setting of cooking fume extractor where the fan speed is altered by a sensor or time
Note 1 to entry: Automatic settings are not used for calculation of the fluid dynamic efficiency (FDE).
3.19
working point
WP
intersection point of pressure/airflow curve and resistance curve – measured WP and
compensated to reference air density WP
C
3.20
lighting system
devices used for the illumination of the cooking surface, excluding ambient illumination unless
there is only one control switch
Note 1 to entry: Power supply units and controllers are included.
3.21
illumination
E
middle
average illumination of the lighting system on the cooking surface, measured in lux, under
standard conditions
3.22
network
communication infrastructure with a topology of links, an architecture and which includes the
physical components, organizational principles, communication procedures and formats
(protocols)
Note 1 to entry: An infrared (IR) remote control is not considered to be a network.
3.23
off mode
condition in which the appliance is connected to the mains and is not providing any active mode
or standby function and where the mode may persist for an indefinite time
Note 1 to entry: The following shall also be considered as off mode
a) conditions providing only an indication of off mode;
b) conditions providing only functionalities intended to ensure electromagnetic compatibility.
– 10 – IEC 61591:2023 © IEC 2023
3.24
standby mode
condition where the appliance is connected to the mains and provides only the following
functions, which may persist for an indefinite time:
a) reactivation function, or reactivation function and a mere indication of enabled reactivation
function; and/or
b) information or status display; and/or
c) detection function for emergency measures.
3.25
standby mode in condition of networked standby
condition where the appliance is connected to the mains and provides only the reactivation
function through a connection to a network, which may persist for an indefinite time.
Note 1 to entry: This mode is only applicable to appliances that provide a connection function to a network.
4 Classification
According to the mode:
– recirculation mode;
– extraction mode.
A cooking fume extractor can be constructed to incorporate both modes.
5 List of measurements
Performance is determined by assessing the following:
– overall dimensions;
– mass;
– power measurement of low-power modes;
– airborne acoustical noise;
– volumetric airflow;
– fluid dynamic efficiency;
– effectiveness and electric power input of the lighting system;
– ability to reduce odours;
– ability to absorb grease.
6 General conditions for measurements
6.1 Test room
The tests are carried out in a draught-free room. The ambient temperature of the room is
maintained at (23 ± 2) °C. The absolute air pressure shall be between 91,3 kPa and 106,3 kPa.
6.2 Installation and positioning
The appliance has to be clean and free of any residues of packaging material and protective
foil.
All tests have to be carried out following the order of the clauses of this document with one and
the same appliance.
IEC 61591:2023 © IEC 2023 – 11 –
The cooking fume extractor (except for the down-draft system) is installed above a cooking
appliance with the distance of (600 ± 10) mm. The distance is determined between the lowest
level of the cooking fume extractor and the highest level of the cooking appliance.
Any pull-out or swing-out mechanism that can be opened to a position for normal use in
accordance with the manufacturer's instructions shall be opened during all tests. Positions that
are for cleaning and maintenance purposes only shall be not considered. If the manufacturer’s
instruction does not state any information, the pull-out or swing-out mechanism shall be
completely closed.
The position for the pull-out or swing-out mechanism shall be maintained unchanged for all
tests except low power mode measurements in Clause 8.
If the down-draft system can be elevated, the manufacturer’s instructions are followed;
otherwise, it shall be measured in its maximum elevated position for use.
If there are different options delivered with the CFE, then, for all tests, the air outlet with its
properties closest to a theoretical resistance curve for a flue pipe with b = 0,000 125 shall be
used. This setup shall be kept for all measurements described in this document.
NOTE More information for b is given in Table 3.
All tests, except the measurements for low-power modes (see Clause 8), are carried out:
– with the default factory settings except adjusting extraction or recirculation mode, if
necessary;
– ensure that no network is connected to the appliance for the duration of the measurement.
Before the measurement is made, any conditioning of the CFE, unless explicitly required in this
document, is not allowed.
Ensure that any automatic settings are switched off.
6.3 Electricity supply
The cooking fume extractor is supplied at the rated voltage ±1 %. The supply voltage shall
be recorded at the point where the appliance is connected to the mains supply during all tests.
If the appliance has a rated voltage range, the tests are carried out at the nominal voltage of
the country where the appliance is intended to be used.
The supply frequency shall be at the rated frequency ±1 % throughout the test. If a frequency
range is indicated, then the test frequency shall be that of the nominal frequency of the country
in which the appliance is intended to be used.
6.4 Filters
For all tests, it shall be ensured that all filters are positioned correctly.
For appliances with more than one grease filter, the filters shall be positioned with no gap in
between (centrally positioned).
6.5 Fan control
Cooking fume extractors shall be tested in the highest continuous setting for normal use,
as stated in the manufacturer’s instructions.
– 12 – IEC 61591:2023 © IEC 2023
6.6 Instrumentation and measurements
Instruments used and measurements made for this document shall comply with the
specifications in Table 1 and Table 2. The accuracy is applied to the measured value.
Table 1 – Instruments
Parameter Unit Minimum Accuracy Additional
resolution requirements
Mass g 0,1 g ±0,5 g
Temperature °C 0,1 °C ±1,5 K Thermocouple type J or
K in accordance with
IEC 60584-1
or
PT100 sensor in
accordance with
IEC 60751.
Time s 1 s ±1 s
Power W - ±1 %
Value under
Illuminance lx - ±10 %
consideration –
International standard
about illuminance
classification is pending.
Pressure/Air pressure Pa - ±1 % The accuracy is for
pressures ≤ 150 Pa and
at least 1,5 Pa.
Table 2 – Measurements
Parameter Unit Accuracy Additional requirements
Voltage V ±0,5 % -
Volumetric airflow ±2 %
m /h
Power measurement - In accordance with IEC 62301
If numbers have to be rounded, they shall be rounded to the nearest number in accordance with
ISO 80000-1:2009, Clause B.3, Rule B. If the rounding takes place to the right of the comma,
the omitted places shall not be filled with zeros.
The tolerances specified for parameters within this document, using the symbol "±", indicate
the allowable limits of variation from the specified targets outside which the test or results shall
be invalid. The statement of tolerance shall not be used for deliberate variation of these
specified targets.
7 Dimensions and mass
7.1 Overall dimensions
The overall dimensions of the cooking fume extractor are measured. The longest width, depth
and height, including any control knobs or other projections, are stated in millimetres rounded
to 10 mm. If dimensions are variable while the cooking fume extractor is operated in normal
use, then the minimum and maximum sizes are stated.
For cooking fume extractors with extraction mode, the dimensions of the air-outlet orifice
are measured and stated.
IEC 61591:2023 © IEC 2023 – 13 –
7.2 Distance between cooking fume extractor and cooking appliance
The shortest distance between the lowest level of the cooking fume extractor, except down-
draft systems, and the highest level of the cooking appliance is measured and indicated in
millimetres, rounded to 10 mm.
7.3 Mass
The mass of the cooking fume extractor, including any filters, supply cord and plug, is
measured and stated in kilograms, rounded to one decimal place.
8 Power measurement of low-power modes
8.1 Purpose and combination of appliances
This clause sets out determination of off mode, standby mode and standby mode in
condition of networked standby. Other low-power modes can exist in some appliances, but
for the current designs, these are not considered important in terms of duration and energy
consumption.
8.2 Measurement
8.2.1 Principles
The requirements of IEC 62301 and IEC 63474 shall be observed in addition to the following
requirements.
However, IEC 62301:2011,5.3 (procedure) and the requirement defining air speed in
IEC 62301:2011, 4.2 shall not apply.
When testing appliances that are fitted with a clock, the clock shall be adjusted to the correct
time and date as specified in the instructions.
If energy consumption is influenced by the continuously changing displayed time of a clock, a
measurement period of 24 h is necessary. The average value from this measurement is noted.
If the appliance has an ambient light sensor, two illuminance levels in accordance with
IEC 62301 shall be measured during the 24 h period, each illuminance level for 12 h.
If an option is provided to the user to switch off the display, both the switched on and switched
off mode are to be tested and reported.
Ensure that the following conditions remain relevant for the duration of the measurement:
– instructions for use regarding installation, operation and settings (as applicable) are
followed;
– the appliance shall be connected to mains power for the duration of the test; if the appliance
is supplied without cable, a cable length of 1 m shall be used;
– no adverse warning indicators are present;
– follow the manufacturer's instructions regarding the configuration of network connectivity
(where applicable);
– ensure that the network is connected to the appliance (when required);
– after each appliance interaction, wait at least 15 min before commencing with
measurements; and
– no interference during measurement by any interaction.
– 14 – IEC 61591:2023 © IEC 2023
Some appliances can require software updates to ensure secure network operations. It is
recommended to allow those updates to be installed and to make a note of it in the test report.
Updates can occur or can be requested after activation of network capability and the update
process can affect energy during measurement. The measurement starts after the completion
of any software update.
The required power consumption can be determined by measuring the power consumption
directly for a certain period of time (not less than 10 min). The data shall be recorded at regular
intervals of 1 s or less throughout the test using a data logger or computer. The average power
is given in watts and rounded with two valid digits after the decimal point.
Alternatively, the energy consumption can be measured for a certain period of time (not less
than 10 min) and the power consumption be calculated by dividing the measured energy
consumption (measured in Wh) by the duration of the measurement (in h). The calculated power
is given in watts and rounded with two valid digits after the decimal point.
Appliance interactions during an active mode shall not be considered for measurement. A step-
by-step instruction for measuring the low-power modes is given in Annex B (Table B.1).
8.2.2 Determination of power consumption in off mode
This subclause is only applicable to appliances providing an off mode.
The appliance under test should be set to off mode in accordance with the manufacturer's
instructions. All actions required to set to off mode shall be taken into account.
In all cases, off mode shall be determined over a period of not less than 10 min. The power
consumption of the off mode is the average of the measured data.
If the appliance provides an off mode, it should be described by the manufacturer.
8.2.3 Determination of power consumption in standby mode
This subclause is only applicable to appliances providing a standby mode.
The appliance under test should be set to standby mode in accordance with the manufacturer's
instructions.
In all cases, standby mode shall be determined over a period of not less than 10 min. The
power consumption of the standby mode is the average of the measured data.
If the appliance provides a standby mode, it should be described by the manufacturer.
8.2.4 Determination of consumption in standby mode in condition of networked
standby
This subclause is only applicable to appliances providing a standby mode in condition of
networked standby.
For appliances with network connectivity, follow the manufacturer’s instructions regarding the
configuration of the appliance and ensure that the network (e.g. LAN or WLAN) is connected
to the appliance and activated.
The highest possible power consumption can be reached when the appliance is not only
connected to the network, but also to a remote user interface (i.e. mobile app). Avoid any
interaction with the remote user interface during the 15 min waiting time and the measurement.
IEC 61591:2023 © IEC 2023 – 15 –
In all cases, standby mode in condition of networked standby shall be determined over a
period of not less than 10 min. The power consumption of the standby mode in condition of
networked standby is the average of the measured data.
Ensure that there is no download and no update running during the measurement.
The test report shall contain the description of the network connection used.
9 Airborne acoustical noise
Where an airborne acoustical noise measurement is required, it shall be measured in
accordance with IEC 60704-2-13.
NOTE A possible procedure for the statistical determination of declared noise values is described in IEC 60704-3.
10 Volumetric airflow
10.1 Purpose and test set up
The purpose of this test is to determine the volumetric airflow.
The volumetric airflow measurement shall comply with the requirements stated in ISO 5167‑1,
ISO 5167-2, ISO 5167-3 and ISO 5167-4.
The air outlet of t
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