SIST EN IEC 61591:2023/A1:2026

• Status: Not Published
• Public Enquiry End Date: 30-Jan-2026
• ICS: 97.040.20 - Cooking ranges, working tables, ovens and similar appliances
• Technical Committee: FGA - Consumer information related to household electrical appliances
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 08-Oct-2026
• Due Date: 13-Dec-2026
• Ref Project: EN IEC 61591:2023/A1:2026 - Cooking fume extractors - Methods for measuring performance

• Refers: SIST EN ISO 80000-1:2023 - Quantities and units - Part 1: General (ISO 80000-1:2022)
• Effective Date: 15-Sep-2026
• Refers: SIST EN IEC 62301:2026 - Measurement of standby power for appliances and equipment
• Effective Date: 15-Sep-2026
• Amends: SIST EN IEC 61591:2023 - Cooking fume extractors - Methods for measuring performance (IEC 61591:2023)
• Effective Date: 01-Dec-2026

SIST EN IEC 61591:2023/A1:2026 is the Slovenian adoption of Amendment 1 to IEC 61591:2023, published by IEC and adopted as EN IEC 61591:2023/prA1:2025. It updates the methods used to measure the performance of cooking fume extractors (CFEs). Manufacturers, test laboratories, and anyone comparing or checking CFE performance use it to apply the same test setup, standby definitions, and calculation methods.

What does SIST EN IEC 61591:2023/A1:2026 specify?

SIST EN IEC 61591:2023/A1:2026 specifies changes to the performance-measurement standard for cooking fume extractors. It amends the base document in the areas that affect test setup, low-power-mode measurement, lighting measurement, odour reduction, grease absorption, and uncertainty reporting.

The amendment is organized through the foreword, Clause 2 on normative references, Clause 3 on terms and definitions, clauses on installation and instrumentation, Clauses 8, 11, 12, 13 and 14 for measurement methods, Annex B for low-power-mode instructions, Annex C for uncertainty, and the bibliography.

Annex	What it covers
Annex B	Step-by-step instruction for measuring low-power modes, including waiting times and networked standby handling
Annex C	Informative uncertainty of measurement for the methods in the document

What are the key requirements of SIST EN IEC 61591:2023/A1:2026?

Clause 2 updates the reference handling for standby testing: IEC 62301 is now cited without a date, and the footnote to IEC 63474 is canceled. In practice, this means users must apply the current referenced edition where applicable when carrying out low-power and standby measurements.

Clause 3 changes the definition of standby mode. SIST EN IEC 61591:2023/A1:2026 now includes a protective function alongside reactivation and information or status display functions, so labs and manufacturers must decide carefully whether a product state is still standby or has moved into active operation.

Clause 6.2 adds a rule for the lowest level of the CFE: pull-out or swing-out mechanisms are not counted there. Clause 6.6 tightens measurement practice by defining the illuminance tolerance and the linear-dimension tolerance for cabinets, countertop, and CFE width. This matters because the physical installation affects airflow, lighting, and repeatability.

Clause 8.2.1 aligns standby measurements with IEC 62301 and IEC 63474, but adds extra timing rules. After each appliance interaction, the method requires at least 20 minutes before measurement starts, and Clause 8.2.4 says not to interact with the remote user interface during the waiting time or measurement. That keeps standby and networked standby readings from being distorted by recent user input.

Clause 11.3.3 replaces the calculation for fluid dynamic efficiency (FDE). Anyone reporting FDE must use the updated formula in the standard, because the result depends on the exact way airflow and pressure terms are combined.

Clauses 12.2 and 13.2 update the test geometry for lighting and odour-reduction measurements. Clause 12.2 changes how the measurement distance is determined for the illuminance setup, and Clause 13.2 revises how CFEs are installed for odour-reduction testing, including the placement of wall cabinets, island and ceiling range hoods, and the cookware temperature before the odour-reduction filter(s) are mounted. These setup details are critical because small changes in position or temperature can change the measured performance.

Clause 14.2 replaces the grease-absorption measuring setup, and Annex B revises the low-power-mode sequence so the waiting time is 20 minutes. Annex C then gives uncertainty guidance based on round-robin testing, which helps users judge how much measurement variation comes from the method itself.

What terms does SIST EN IEC 61591:2023/A1:2026 define?

• Cooking fume extractor (CFE) - The appliance type covered by the document, including range hoods and related extractor designs used over cooking equipment.
• Standby mode - A mains-connected state where only reactivation, information or status display, or protective functions can continue indefinitely.
• Reactivation function - A function that lets the appliance return to use, such as a control or sensor that detects user interaction.
• Protective function - A function that protects the appliance or user while in standby, such as an alarm when touch controls are overflowed with water.
• Networked standby - A standby condition measured with network connection considerations in place, covered by the low-power-mode procedure in Annex B.
• Fluid dynamic efficiency (FDE) - The performance measure calculated in Clause 11.3.3 from the specified airflow and pressure terms.
• Odour reduction factor - The performance measure used to express how well a CFE reduces odour under the test method in Clause 13.
• Grease absorption factor - The performance measure used to express grease capture under the test method in Clause 14.

Who uses SIST EN IEC 61591:2023/A1:2026?

SIST EN IEC 61591:2023/A1:2026 is used by CFE manufacturers, test laboratories, and product development teams that need comparable performance data. It is also relevant to quality managers, certification bodies, and buyers who review declared performance or test reports.

In practice, users apply it when setting up laboratory measurements, checking standby and networked standby behavior, calculating FDE, and reporting lighting, odour-reduction, and grease-absorption results for different CFE types.

What changed in SIST EN IEC 61591:2023/A1:2026 from the previous edition?

SIST EN IEC 61591:2023/A1:2026 amends IEC 61591:2023. The changes stated in the document are:

• IEC 62301 is changed from a dated to an undated normative reference.
• The footnote to IEC 63474 is canceled.
• The definition of standby mode is updated to include protective function.
• Clause 6.2 adds the rule for the lowest level of the CFE.
• Clause 6.6 updates measurement tolerances for illuminance and linear dimensions.
• Clause 8 updates standby and networked standby measurement timing and interaction rules.
• Clause 11 changes the FDE calculation.
• Clauses 12, 13, and 14 update measurement setups and figures.
• Annex B is revised for low-power-mode measurement.
• Annex C is added for uncertainty of measurement.

Which standards are used with SIST EN IEC 61591:2023/A1:2026?

• IEC 62301 - Used for standby-related measurement requirements and instrument conditions in Clause 8.
• IEC 63474 - Used together with IEC 62301 for standby and networked standby measurement requirements in Clause 8.
• IEC TR 63250 - Cited in the bibliography and used as the basis for the uncertainty approach described in Annex C.
• IEC 61591:2023 - The base standard that this amendment updates.

What does the SIST EN IEC 61591:2023/A1:2026 document contain?

The document contains targeted amendments to the measurement methods for CFEs, including revised text in the foreword, clauses, figures, and tables. It includes a replacement definition in Clause 3, updated setup rules in Clauses 6, 8, 12, 13, and 14, and a new calculation form for FDE in Clause 11.

It also contains a revised Table B.1 for low-power-mode testing and a new informative Annex C on uncertainty of measurement. Annex C links the methods to round-robin testing and explains how uncertainty was assessed for FDE, lighting effectiveness, odour reduction, and grease absorption.

SLOVENSKI STANDARD
SIST EN IEC 61591:2023/oprA1:2026
01-januar-2026
Odvajalniki kuhinjskih hlapov - Metode za merjenje lastnosti - Dopolnilo A1
Amendment 1 - Cooking fume extractors - Methods for measuring performance
Absauger für Kochdünste - Verfahren zur Messung der Gebrauchseigenschaft
Extracteurs de fumée de cuisine - Méthodes de mesure de l'aptitude à la fonction
Ta slovenski standard je istoveten z: EN IEC 61591:2023/prA1:2025
ICS:
97.040.20 Štedilniki, delovni pulti, Cooking ranges, working
pečice in podobni aparati tables, ovens and similar
appliances
SIST EN IEC 61591:2023/oprA1:2026 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN IEC 61591:2023/oprA1:2026

SIST EN IEC 61591:2023/oprA1:2026
59K/424/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61591/AMD1 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-11-14 2026-02-06
SUPERSEDES DOCUMENTS:
59K/417/CD, 59K/422/CC
IEC SC 59K : PERFORMANCE OF HOUSEHOLD AND SIMILAR ELECTRICAL COOKING APPLIANCES
SECRETARIAT: SECRETARY:
Germany Ms Susanne Stolz
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 59
ASPECTS CONCERNED:
Environment
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
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clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Amendment 1 - Cooking fume extractors - Methods for measuring performance

PROPOSED STABILITY DATE: 2027
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SIST EN IEC 61591:2023/oprA1:2026
IEC CDV 61591:2023/AMD1 © IEC 2025
1 INTERNATIONAL ELECTROTECHNICAL COMMISSION
2 ____________
4 COOKING FUME EXTRACTORS
6 Methods for measuring performance
8 AMENDMENT 1
10 FOREWORD
11 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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47 such patent rights.
48 Amendment 1 to IEC 61591:2023 has been prepared by subcommittee 59K: Performance of
49 household and similar electrical cooking appliances, of IEC technical committee 59:
50 Performance of household and similar electrical appliances.
51 The text of this Amendment is based on the following documents:
Draft Report on voting
59K/XXX/CDV 59K/XX/XXX
53 Full information on the voting for its approval can be found in the report on voting indicated in
54 the above table.
SIST EN IEC 61591:2023/oprA1:2026
IEC CDV 61591:2023/AMD1 © IEC 2025
55 The language used for the development of this Amendment is English.
56 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
57 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
58 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
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60 The committee has decided that the contents of this document will remain unchanged until the
61 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
62 specific document. At this date, the document will be
63 • reconfirmed,
64 • withdrawn, or
65 • revised.
66 ___________
67 2 Normative references
68 Replace the dated reference to IEC 62301 by an undated reference
69 Cancel the footnote to IEC 63474
70 3 Terms and definitions
71 Change the definition 3.24 as follows:
72 3.24
73 Replace the definition with the following new definition:
74 standby mode
75 condition where the appliance is connected to the mains and provides only the following
76 functions, which can persist for an indefinite duration:
77 a) reactivation function, or reactivation function and a mere indication of enabled
78 reactivation function;
79 b) information or status display;
80 c) prot
...