FprEN IEC 60335-2-21:2026/FprAA:2026
(Amendment)Household and similar electrical appliances - Safety - Part 2-21: Particular requirements for storage water heaters
- Status
- Not Published
- Publication Date
- 25-Mar-2027
- Technical Committee
- CLC/TC 61 - Safety of household and similar electrical appliances
- Drafting Committee
- CLC/TC 61/WG 01 - Relation with standardization and legislation
FprEN IEC 60335-2-21:2026/FprAA:2026 is a CENELEC draft amendment for household and similar electrical appliances, focused on the safety requirements for storage water heaters. It is being developed by CLC/TC 61 and, if approved, will modify prEN IEC 60335-2-21:2024 and be read together with Part 1.
What does FprEN IEC 60335-2-21:2026/FprAA:2026 specify?
FprEN IEC 60335-2-21:2026/FprAA:2026 specifies amendments to the European safety standard for storage water heaters. The document adjusts general scope wording, user instructions, test conditions for remote operation, abnormal-operation checks, construction requirements, and the treatment of rusting, and it updates the annexes linked to EU and national application.
The amendment is organized as changes to the introduction and to clauses 1, 2, 7, 11, 19, 22 and 31, followed by updates to the annexes and bibliography. It is read in conjunction with prEN IEC 60335-2-21:2024 and uses the same Part 1 structure, with extra European clauses and annexes marked with the prefix Z.
| Annex | What it covers |
|---|---|
| ZA | Normative references to international publications and their European publications |
| ZB | Special national conditions |
| ZC | A-deviations |
| ZE | Specific additional requirements for commercial use - not applicable |
| ZZA | Relationship to the safety objectives of Directive 2014/35/EU |
| ZZB | Relationship to Directive 2006/42/EC - not applicable |
| ZZC | Relationship to the essential requirements of Directive 2014/53/EU |
What are the key requirements of FprEN IEC 60335-2-21:2026/FprAA:2026?
FprEN IEC 60335-2-21:2026/FprAA:2026 mainly strengthens how storage water heaters are described, instructed, and tested when they can be operated remotely. It also adds specific national conditions and EU conformity information that matter for market access and testing.
Scope and user considerations
Clause 1 replaces the scope wording so the standard is framed around reasonably foreseeable hazards. It also adds a note that people with disabilities may have needs beyond the level addressed by the document, which is important when assessing user instructions and accessibility-related risks.
Markings and instructions
Clause 7 expands the instruction content. The instructions must cover intended use, user maintenance and operation, training where needed, safe adjustment and maintenance, stability conditions during use and dismantling, what to do in an accident or breakdown, the maximum weight including accessories and packaging, and the statement that repairs are to be done by competent persons.
Clause 7.12 also adds a specific instruction that children aged from 3 years are only allowed to operate the tap connected to the water heater. In practice, manufacturers need to make the user documentation match the appliance’s real operating risks and user population.
Heating and abnormal operation
Clause 11 adds a remote-operation test condition: the heating test is repeated with control units and switches set to the highest setting and the longest remotely selectable duration. This matters for appliances that can be started, adjusted, or left running remotely.
Clause 19 adds an abnormal-operation case for three-phase water heaters with star connection and no neutral: all separate thermostats in the phases are short-circuited at the same time. That gives a more severe fault condition for safety evaluation.
Construction and continuous remote operation
Clause 22 adds requirements at 22.40, 22.49 and 22.51 for appliances intended for remote operation. They must be able to operate continuously, automatically or remotely without creating a hazard, which is important for connected or unattended products.
Applicability of rusting test
Clause 31 changes the treatment of resistance to rusting by making the Part 1 clause not applicable. Readers should treat corrosion assessment through the clause structure given here, not by automatically applying Part 1.
National and conformity annexes
Annex ZB adds special national conditions for Denmark, Finland, Norway and Sweden on minimum rated pressure for closed water heaters, and for Denmark on minimum clear flow diameter for certain inlet and safety components. Annex ZC adds United Kingdom A-deviations, including extra safety devices for unvented water heaters and a maximum stored-water temperature of 100 °C.
What terms does FprEN IEC 60335-2-21:2026/FprAA:2026 define?
- Storage water heaters - Appliances covered by this part, used to store heated water for later use.
- Remote operation - Operation controlled at a distance, including settings that can keep the appliance running automatically or remotely.
- Competent persons - People qualified to carry out repairs safely, as required in the instructions.
- Closed water heaters - Water heaters covered by the national condition in Annex ZB for Nordic countries.
- A-deviations - National deviations listed in Annex ZC that apply in the United Kingdom.
- Presumption of conformity - The legal effect described in Annex ZZA and ZZC when the standard is cited in the Official Journal of the European Union.
- Part 1 - The general safety standard, EN IEC 60335-1:2023, used together with this Part 2 document.
Who uses FprEN IEC 60335-2-21:2026/FprAA:2026?
FprEN IEC 60335-2-21:2026/FprAA:2026 is used by manufacturers of storage water heaters, product designers, test laboratories, certification bodies, and compliance teams. It is also relevant to buyers and regulators who need to check whether a heater’s design, instructions, and test evidence match the safety expectations for household and similar electrical appliances.
The document is especially relevant where appliances include remote operation, where country-specific requirements apply, or where EU low-voltage conformity is being assessed.
What changed in FprEN IEC 60335-2-21:2026/FprAA:2026 from the previous edition?
FprEN IEC 60335-2-21:2026/FprAA:2026 is a draft amendment to prEN IEC 60335-2-21:2024. The changes stated in the document add new wording and requirements to the introduction, scope, normative references, markings and instructions, heating tests, abnormal operation, construction, resistance to rusting, annexes, and bibliography, and it updates the relationship with EU legislation in Annexes ZZA and ZZC.
Which standards are used with FprEN IEC 60335-2-21:2026/FprAA:2026?
FprEN IEC 60335-2-21:2026/FprAA:2026 is read with prEN IEC 60335-2-21:2024 and refers to these publications in its annexes:
- EN IEC 60335-1:2023 - the general safety requirements for household and similar electrical appliances
- IEC 60335-1:2020 - the international basis for Part 1 in the annex reference table
- IEC 60584-1 - thermocouple EMF specifications and tolerances
- IEC 60730-1:2013 with amendments - automatic electrical controls, used in the annex reference table for conformity mapping
What does the FprEN IEC 60335-2-21:2026/FprAA:2026 document contain?
The document contains clause-by-clause amendments rather than a full rewritten standard. It updates the introduction, scope, normative references, instructions, heating test conditions, abnormal-operation testing, construction provisions, and rusting requirements, then adds or revises annexes for national conditions and legal relationship tables.
It also includes correspondence tables in Annex ZZA and ZZC that map clauses to the safety objectives of Directive 2014/35/EU and to the essential requirements of Directive 2014/53/EU. For users who need certification or conformity work, those tables show where the standard is intended to support legal compliance, while the main clauses show the technical safety changes that must be checked.
Relations
- Effective Date
- 31-Oct-2023
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Frequently Asked Questions
FprEN IEC 60335-2-21:2026/FprAA:2026 is a draft published by CLC. Its full title is "Household and similar electrical appliances - Safety - Part 2-21: Particular requirements for storage water heaters". This standard covers: Household and similar electrical appliances - Safety - Part 2-21: Particular requirements for storage water heaters
Household and similar electrical appliances - Safety - Part 2-21: Particular requirements for storage water heaters
FprEN IEC 60335-2-21:2026/FprAA:2026 is classified under the following ICS (International Classification for Standards) categories: 13.120 - Domestic safety; 91.140.65 - Water heating equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
FprEN IEC 60335-2-21:2026/FprAA:2026 has the following relationships with other standards: It is inter standard links to FprEN IEC 60335-2-21:2026. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
FprEN IEC 60335-2-21:2026/FprAA:2026 is associated with the following European legislation: EU Directives/Regulations: 2014/35/EU, 2014/53/EU; Standardization Mandates: M/511, M/536. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
FprEN IEC 60335-2-21:2026/FprAA: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)
SLOVENSKI STANDARD
01-september-2024
Gospodinjski in podobni električni aparati - Varnost - 2-21. del: Posebne zahteve
za akumulacijske grelnike vode - Dopolnilo AA
Household and similar electrical appliances - Safety - Part 2-21: Particular requirements
for storage water heaters
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-21:
Besondere Anforderungen für Wassererwärmer (Warmwasserspeicher und
Warmwasserboiler)
Appareils électrodomestiques et analogues - Sécurité - Partie 2-21: Exigences
particulières pour les chauffe-eau à accumulation
Ta slovenski standard je istoveten z: prEN IEC 60335-2-21:2024/prAA:2024
ICS:
13.120 Varnost na domu Domestic safety
91.140.65 Oprema za ogrevanje vode Water heating equipment
oSIST prEN IEC 60335-2- en
21:2024/oprAA:2024
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD DRAFT
prEN IEC 60335-2-21:2024
NORME EUROPÉENNE
EUROPÄISCHE NORM
prAA
June 2024
ICS 13.120; 91.140.65 -
English Version
Household and similar electrical appliances - Safety - Part 2-21:
Particular requirements for storage water heaters
Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-21: Exigences particulières pour les chauffe-eau à ähnliche Zwecke - Teil 2-21: Besondere Anforderungen für
accumulation Wassererwärmer (Warmwasserspeicher und
Warmwasserboiler)
This draft amendment prAA, if approved, will modify the European Standard prEN IEC 60335-2-21:2024; it is submitted to CENELEC
members for enquiry.
Deadline for CENELEC: 2024-09-06.
It has been drawn up by CLC/TC 61.
If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.
This draft amendment was established by CENELEC 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 78880 Ref. No. prEN IEC 60335-2-21:2024/prAA:2024 E
prEN IEC 60335-2-21:2024/prAA:2024 (E)
1 European foreword
2 This document (prEN IEC 60335-2-21:2024/prAA:2024) has been prepared by CLC/TC 61 "Safety of
3 household and similar electrical appliances".
4 This document is currently submitted to the Enquiry.
5 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
6 This document is read in conjunction with prEN IEC 60335-2-21:2024.
7 The numbering system for European clauses, subclauses, notes, tables, figures and annexes that are
8 additional to those in the IEC standard are prefixed with the letter “Z”.
9 This document has been prepared under a standardization request addressed to CENELEC by the European
10 Commission. The Standing Committee of the EFTA State subsequently approves these requests for its
11 Member States.
12 For the relationship with EU legislation, see informative Annexes ZZA and ZZC, which are an integral part of
13 this document.
prEN IEC 60335-2-21:2024/prAA:2024 (E)
14 1 Modification to the Introduction
15 Addition:
16 With European amendment A11, EN 60335-2-21:2021+A1:2021 is superseded.
17 This European amendment A11 supplements or modifies the corresponding clauses of the standards below:
18 — EN IEC 60335-1:2023+A11:2023 (Part 1)
19 — EN IEC 60335-2-21:2024 (Part 2)
20 2 Modification to Clause 1, “Scope”
21 Replace the fourth paragraph starting with "As far as is practicable …" up to "… in general, it does not take
22 into account " except for the dashed items with the following:
23 “This standard deals with the reasonably foreseeable hazards presented by appliances and machines that are
24 encountered by all persons. However, in general, it does not take into account:”
25 Add before the fifth paragraph starting with “Attention is drawn to the fact” the following:
26 “It is recognized that people with disabilities can have needs beyond the level addressed in this standard.”
27 3 Modification to Clause 2, “Normative references”
28 Addition:
29 EN IEC 60335-1:2023, Household and similar electrical appliances - Safety - Part 1: General requirements
30 4 Modification to Clause 7, “Markings and instructions”
31 7.12 Addition
32 In the fourth paragraph starting with “The instructions shall state the substance of the following”, add the
33 following dashed items:
34 “
35 — Children aged from 3 years are only allowed to operate the tap connected to the water heater.
36 — the intended use of the appliance as covered by the scope of this standard;
37 — instructions regarding user maintenance and operation of the appliance and, if necessary, instructions for
38 the training of operators;
39 — instructions designed to enable adjustment and maintenance to be carried out safely, including the
40 protective measures that should be taken during these operations;
41 — the conditions under which the appliance is stable during use, dismantling when out of use, testing or
42 foreseeable breakdowns;
43 — the operating method to be followed in the event of accident or breakdown to prevent unsafe actions.”
44 Add the following:
45 “The instructions shall also state the maximum weight of the appliance including accessories and its
46 packaging.”
As impacted by EN IEC 60335-1:2023/A11:2023.
prEN IEC 60335-2-21:2024/prAA:2024 (E)
47 7.12.1 Addition:
48 The instructions shall state that any repairs shall be carried out by competent persons.
49 5 Modification to Clause 11, “Heating”
50 11.101 Addition
51 For remote operation of appliances, the test is repeated with the control units and switches adjusted to the
52 highest setting and maximum duration of operation that can be set for remote operation.
Secretary Note: the above sentence is in line with decision taken in document
61/6883A/INF. The above sentence is mandatory for addressing the ERs and link the
standard to RED
53 6 Modification to Clause 19, “Abnormal operation”
54 19.2 Addition:
55 If there are separate thermostats in the phases of a three-phase water heater with star connection (without
56 neutral), all thermostats are short-circuited simultaneously.
57 7 Modification to Clause 22, “Construction”
58 22.40 Addition:
59 Appliances for remote operation can operate continuously, automatically or remotely without giving rise to a
60 hazard.
61 22.49 Addition:
62 Appliances for remote operation can operate continuously, automatically or remotely without giving rise to a
63 hazard.
64 22.51 Addition:
65 Addition:
66 Appliances for remote operation can operate continuously, automatically or remotely without giving rise to a
67 hazard.
68 8 Modification to Clause 31, “Resistance to rusting”
69 Replace “This clause of Part 1 is applicable” with “This clause of Part 1 is not applicable”.
70 9 Modification to annexes
71 To the e
...