IEC 60335-2-53:2011
(Main)Household and similar electrical appliances - Safety - Part 2-53: Particular requirements for sauna heating appliances and infrared cabins
Household and similar electrical appliances - Safety - Part 2-53: Particular requirements for sauna heating appliances and infrared cabins
IEC 60335-2-53:2011 deals with the safety of electric sauna heating appliances and infrared emitting units having a rated power input not exceeding 20 kW, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances. The appliances covered by this standard are intended for use in the home and in public saunas located in blocks of flats, hotels and similar locations. This standard also deals with the safety of electric sauna heating appliances provided with a humidifier unit, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances. The room air is humidified by evaporating or atomising water. This fourth edition cancels and replaces the third edition published in 2002 and its Amendment 1 (2007). It constitutes a technical revision. The principal changes in this edition as compared with the third edition of IEC 60335-2-53 are as follows:
- the scope is changed to cover infrared cabins;
- additional requirements for recessed sauna heaters are added;
- requirements of electronic interlocks are added (22.108).
The attention of National Committees is drawn to the fact that equipment organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months or later than 36 months from the date of publication.
This publication is to be read in conjunction with IEC 60335-1:2010.
Appareils électrodomestiques et analogues - Sécurité - Partie 2-53: Règles particulières pour les appareils de chauffage de saunas et les cabines infrarouges
La CEI 60335-2-53:2011 traite de la sécurité des appareils de chauffage de saunas et des unités infrarouges électriques dont la puissance assignée n'est pas supérieure à 20 kW et dont la tension assignée n'est pas supérieure à 250 V pour les appareils monophasés et à 480 V pour les autres appareils. Les appareils couverts par la présente norme sont destinés à être utilisés dans les saunas d'habitation et les saunas publics situés dans des immeubles, des hôtels ou des lieux similaires. La présente norme traite également de la sécurité des appareils de chauffage de saunas comportant un élément humidificateur et dont la tension assignée n'est pas supérieure à 250 V pour les appareils monophasés et à 480 V pour les autres appareils. L'air de la pièce est humidifié en vaporisant ou en atomisant de l'eau. Cette quatrième édition annule et remplace la troisième édition parue en 2002 et son Amendement 1 (2007), dont elle constitue une révision technique. Par rapport à la troisième édition de la CEI 60335-2-53, les principales modifications indiquées ci-après ont été apportées dans la présente édition:
- le domaine d'application est modifié pour couvrir les cabines infrarouges;
- des exigences complémentaires sont ajoutées pour les radiateurs pour saunas destinés à être installés dans un renfoncement;
- des exigences pour les verrouillages électroniques sont ajoutées (22.108).
L'attention des Comités Nationaux est attirée sur le fait que les fabricants d'appareils et les organismes d'essai peuvent avoir besoin d'une période transitoire après la publication d'une novelle publication CEI, ou d'une publication amendée ou révisée, pour fabriquer des produits conformes aux nouvelles exigences et pour adapter leurs équipements aux nouveaux essais ou aux essais révisés. Le comité recommande que le contenu de cette publication soit entériné au niveau national au plus tôt 12 mois et au plus tard 36 mois après la date de publication.
Cette publication doit être lue conjointement avec la CEI 60335-1:2010.
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Standards Content (Sample)
IEC 60335-2-53 ®
Edition 4.0 2011-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-53: Particular requirements for sauna heating appliances and infrared
cabins
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-53: Règles particulières pour les appareils de chauffage de saunas et les
cabines infrarouges
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IEC 60335-2-53 ®
Edition 4.0 2011-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-53: Particular requirements for sauna heating appliances and infrared
cabins
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-53: Règles particulières pour les appareils de chauffage de saunas et les
cabines infrarouges
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 97.100.10 ISBN 978-2-88912-453-4
– 2 – 60335-2-53 IEC:2011
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 9
4 General requirement . 10
5 General conditions for the tests . 10
6 Classification . 10
7 Marking and instructions . 11
8 Protection against access to live parts . 14
9 Starting of motor-operated appliances . 14
10 Power input and current . 14
11 Heating . 14
12 Void. 15
13 Leakage current and electric strength at operating temperature . 15
14 Transient overvoltages . 15
15 Moisture resistance . 15
16 Leakage current and electric strength . 15
17 Overload protection of transformers and associated circuits . 15
18 Endurance . 15
19 Abnormal operation . 16
20 Stability and mechanical hazards . 18
21 Mechanical strength . 18
22 Construction . 19
23 Internal wiring . 21
24 Components . 22
25 Supply connection and external flexible cords . 22
26 Terminals for external conductors . 22
27 Provision for earthing . 22
28 Screws and connections . 22
29 Clearances, creepage distances and solid insulation . 23
30 Resistance to heat and fire . 23
31 Resistance to rusting . 23
32 Radiation, toxicity and similar hazards . 23
Annexes . 25
Annex R (normative) Software evaluation . 25
Annex AA (normative) Sauna room for testing sauna heating appliances . 26
Annex BB (normative) Estimation of the infrared radiation . 28
Bibliography . 30
Figure 101 – Temperature/relative humidity characteristic during normal operation . 24
Figure 102 – Temperature/relative humidity characteristic during abnormal operation . 24
60335-2-53 IEC:2011 – 3 –
Figure AA.1 – Sauna room . 27
Table 101 – Volume of sauna room . 16
– 4 – 60335-2-53 IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-53: Particular requirements for sauna
heating appliances and infrared cabins
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,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
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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) 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.
International Standard IEC 60335-2-53 has been prepared by IEC technical committee 61:
Safety of household and similar electrical appliances.
This fourth edition cancels and replaces the third edition published in 2002 and its
Amendment 1 (2007). It constitutes a technical revision.
The principal changes in this edition as compared with the third edition of IEC 60335-2-53 are
as follows (minor changes are not listed):
– the scope is changed to cover infrared cabins;
– additional requirements for recessed sauna heaters are added;
– requirements of electronic interlocks are added (22.108).
60335-2-53 IEC:2011 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
61/4135/FDIS 61/4157/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fifth edition (2010) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electric sauna heating
appliances and infrared cabins.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states “addition”, “modification” or “replacement”,
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – 60335-2-53 IEC:2011
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.
The following differences exist in the countries indicated below.
– 6.1: Class 0I appliances are allowed (Japan).
– 11.2: The temperature rises in front of the sauna heater are not measured (USA).
– 11.8: The temperature rise limits are different (USA).
– 13.2: Leakage current tests are carried out on sauna heaters having a supply cord (USA).
– 16.2: Leakage current tests are carried out on sauna heaters having a supply cord (USA).
– 19.1: The volume of the sauna room is different (USA).
– 19.5: The test is also carried out on appliances intended to be permanently connected to fixed wiring
(Norway).
– 19.102: The test is not applicable (USA).
– 22.101: The mass of rocks is different (USA).
– 22.103: The requirement is not applicable (USA).
– 24.102: The 125 °C limit is not applicable (USA).
– 25.7: The supply cords are different (USA).
– Annex AA: The sauna room is different (USA).
IMPORTANT – The 'colour inside' logo on the cover page of this publication 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.
60335-2-53 IEC:2011 – 7 –
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions. It also covers abnormal
situations that can be expected in practice and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
NOTE 1 For example, if sauna heating appliances within the scope of this part 2 include a humidifier unit, then
IEC 60335-2-98 is applicable as far as is reasonable.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 2 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 3 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
– 8 – 60335-2-53 IEC:2011
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-53: Particular requirements for sauna
heating appliances and infrared cabins
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric sauna heating appliances and
infrared emitting units having a rated power input not exceeding 20 kW, their rated
voltage being not more than 250 V for single-phase appliances and 480 V for other
appliances.
The appliances covered by this standard are intended for use in the home and in public
saunas located in blocks of flats, hotels and similar locations.
NOTE 101 Sauna heating appliances may be of the thermal storage type.
This standard also deals with the safety of electric sauna heating appliances provided with a
humidifier unit, their rated voltage being not more than 250 V for single-phase appliances
and 480 V for other appliances. The room air is humidified by evaporating or atomising water.
NOTE 102 A humidifier may be part of a sauna heating appliance or may be incorporated in the sauna heater.
The sauna heating appliance or sauna heater may be operated with or without the humidifier.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
NOTE 103 Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 104 This standard does not apply to
– appliances intended to be used in locations where special conditions prevail, such as the presence of a
corrosive or explosive atmosphere (dust, vapour or gas);
– appliances intended to cause perspiration to only a part of the human body;
– sweating baths where the head of the user remains outside the heated space;
– tents and other collapsible sauna baths;
– room heaters (IEC 60335-2-30);
– humidifiers intended for use with heating, ventilation, or air-conditioning systems (IEC 60335-2-88);
– humidifiers (IEC 60335-2-98);
– appliances intended for medical purposes (IEC 60601).
60335-2-53 IEC:2011 – 9 –
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
ISO 3864-1, Graphical symbols – Safety colours and safety signs – Part 1: Design principles
for safety signs in workplaces and public areas
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions:
Sauna heating appliances, sauna heaters, infrared emitters and infrared emitting units
are installed in the sauna room specified in Annex AA and in accordance with the instructions.
The volume of the sauna room is the minimum value specified in the instructions.
The rock container is filled in accordance with the instructions. If the capacity of the rock
container is adjustable, the container is filled with the most unfavourable quantity of rocks. If
the rock container has a lid, the lid is positioned in accordance with the instructions.
Prefabricated saunas and prefabricated infrared cabins are installed in accordance with
the instructions.
3.101
sauna heater
appliance incorporating heating elements having a container filled with appropriate rocks
3.102
sauna heating appliance
appliance comprising a sauna heater, controls, protective devices and control board
3.103
prefabricated sauna
assembly comprising a sauna room and a sauna heating appliance
3.104
infrared emitter
assembly that emits infrared radiation
3.105
infrared emitting unit
appliance comprising at least one infrared emitter, controls, protective devices and control
board
3.106
prefabricated infrared cabin
assembly comprising a cabin and at least one infrared emitting unit
– 10 – 60335-2-53 IEC:2011
3.107
fireguard
part of the enclosure of an infrared emitter through which the infrared emitter is normally
visible and which is intended to guard against direct access to the infrared emitter
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.2 Addition:
If the appliance comprises more than one sauna heater or more than one infrared emitter,
these are tested together.
5.3 Addition:
For appliances where both sauna and humidifying operation is possible, the tests for sauna
operation are made first, followed immediately by the tests for humidifying. The thermostats
and humidity controls, if any, are initially set to their maximum setting.
5.101 If a ventilating fan operates independently of the heating element, the tests are carried
out with or without the fan in operation, whichever is more unfavourable.
5.102 When a combination of sauna-heating appliances and infrared emitting units is to
be tested, the tests are carried out under the most unfavourable conditions.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Modification:
Appliances shall be class I, class II or class III.
6.2 Addition:
Appliances, controls, protective devices and control boards intended to be mounted inside a
sauna room shall be at least IPX4.
Electrical components of prefabricated saunas shall be at least IPX4.
Infrared emitters, controls and protective devices intended to be mounted inside a cabin
shall be at least IPX2.
Infrared emitters, controls and protective devices intended to be mounted inside a cabin in
combination with a sauna-heating appliance shall be at least IPX4.
60335-2-53 IEC:2011 – 11 –
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Sauna heaters and infrared emitters shall be marked with symbol ISO 7000-0790 (2004-01)
or with the substance of the following:
Read operators manual.
They shall also be marked with
– the minimum distance between the top of the heater and the ceiling of the sauna room;
– the minimum distance between the bottom of the heater and the floor of the sauna room,
unless this distance is determined by the construction of the heater;
– the minimum horizontal distance between the heater and any combustible material of the
sauna room, including a protective rail, unless these distances are determined by the
construction of the heater;
– the maximum depth and minimum width of the recess for sauna heaters intended to be
installed in a recess.
Sauna heaters and infrared emitters shall be marked with symbol IEC 60417-5641
(2002-10) combined with the prohibition sign of ISO 3864-1, except for colours, or with the
substance of the following:
WARNING: Do not cover.
The inside wall of prefabricated saunas or prefabricated infrared cabins shall be marked
near the sauna heater or infrared emitter with the substance of the following:
WARNING: Covering the heater or infrared emitter causes fire risk
Sauna heaters shall be marked with the substance of the following:
WARNING: An inadequately filled rock container causes fire risk
NOTE 101 This warning is not required if the sauna heater complies with Clause 11 without rocks in the
container.
7.6 Addition:
Do not cover
NOTE 101 This symbol incorporates symbol IEC 60417-5641(2002-10) combined with the prohibition sign of
ISO 3864-1, except for colours.
7.7 Addition:
Control boards shall have a connection diagram that gives details of the electrical connections
for controls and protective devices.
– 12 – 60335-2-53 IEC:2011
NOTE 101 The connection diagram may also show connections, other than those required, provided the
additional information does not cause confusion.
NOTE 102 If more than one control board is provided, the connection diagram may be divided so that each
control board has its own connection diagram and a reference to the other control boards.
7.12 Addition:
The instructions for sauna heaters shall state how to fill the rock container.
The instructions for appliances for public saunas that do not have a timer shall state that the
appliance is to be continuously attended. The instructions for other sauna heating
appliances and infrared emitting units shall state that the sauna room or cabin is to be
inspected before either restarting the timer or by switching on the appliance by a separate
remote-control system.
Unless the sauna heater for public saunas complies with the test of 19.101, the instructions
for sauna heaters for public saunas and sauna heating appliances and infrared emitting
units for public saunas that may be switched on by a separate remote-control system shall
state that the sauna room or cabin is to be inspected before setting the appliance to a stand-
by mode for a delayed start.
The instructions for prefabricated infrared cabins and the instructions for prefabricated
saunas incorporating infrared emitters shall state that cleaning with steam cleaners, high
pressure cleaners and spraying water is not allowed.
If the appliances are marked with the symbol IEC 60417-5641 (2002-10) combined with the
prohibition sign of ISO 3864-1 except for colours, their meaning shall be explained.
The instructions for infrared emitters shall include the substance of the following:
• it is recommended that the infrared cabin should not be used within 24 h after UV radiation
exposure from artificial sources or sun-bathing;
• individuals who may be at risk from hyperthermia, such as individuals suffering from
cardiovascular disease, should seek medical advice before use of infrared warming
cabins;
• when persistent erythema (reddening of the skin lasting more than a day) and netlike
colour changes persist after regular exposure to infrared radiation, exposure should not be
repeated and medical advice should be sought to prevent development of erythema ab
igne;
• if you are a person with compromised heat pain sensation or under the influence of alcohol
or tranquilizers you should not use infrared warming cabins.
7.12.1 Addition:
The installation instructions of sauna heaters intended for a recessed installation shall give
details of the proper installation in a recessed area and state that means that prevent
combustible objects being placed on the top of the heater have to be installed in the air
channel above the heater.
NOTE 101 For example, an air outlet grill or guard spaced a minimum 40 mm from any heated surfaces beneath,
whose dimensions of the opening do not exceed 53 mm × 20 mm or 126 mm × 12 mm, is considered to be a
suitable means.
The installation instructions for prefabricated saunas and prefabricated infrared cabins
shall give details on how to assemble the appliance.
60335-2-53 IEC:2011 – 13 –
The installation instructions for sauna heating appliances and infrared emitting units shall
include the following details:
– the minimum and maximum volume, in cubic metres, of the sauna room or cabin in which
the sauna heater or infrared emitter is intended to be installed;
– the minimum height of the sauna room or cabin;
– the materials to be used for the walls and the ceiling of the sauna room or cabin;
– the arrangement of the separate protective rail, if applicable;
– the means of ventilating the sauna room or cabin;
– the installation of adjacent sauna heaters or infrared emitters or a statement that the
sauna heater or infrared emitter must be used alone;
– the connection and position of controls in the sauna room or cabin;
– that thermostat sensors shall be installed so that they are not influenced by incoming air;
– the installation of the control board, including a statement that the control board must be
mounted outside the sauna room or cabin (not necessary if the control board is at least
IPX4);
– the type of cable for supplying of the sauna heater or infrared emitter.
The instructions for infrared emitters shall state
• the minimum distance between the top of an infrared emitter and the ceiling of the cabin;
• the minimum distance between the bottom of an infrared emitter and the floor of the
cabin, unless this distance is determined by the construction of the infrared emitter;
• the minimum horizontal distance between an infrared emitter and any combustible
material of the cabin, including a protective rail, unless these distances are determined by
the construction of the infrared emitter;
• the minimum distance between adjacent infrared emitters.
The installation instructions for appliances for public saunas or infrared cabins that do not
have a timer shall state that a pilot lamp showing that the heater or infrared emitter is
switched on is to be installed in the attendant's room.
Unless the sauna heater complies with the test of 19.101, the installation instructions for
sauna heating appliances or infrared emitting units that incorporate a stand-by mode
setting for remote operation shall state that the door of the sauna room or cabin shall be
fitted with an interlock such that the stand-by mode setting for remote operation is disabled if
the sauna door or cabin door is opened when the stand-by mode setting for remote operation
is set.
7.14 Addition:
The marking of distances to combustible material of the sauna room or cabin shall be clearly
visible from the outside of the sauna heater or infrared emitter without removing covers.
The warnings concerning fire risks shall be visible after the sauna heater or infrared emitter
has been installed and the lettering shall have a height of at least
– 5 mm, for headings;
– 3 mm, for other lettering.
NOTE 101 These warnings may be placed on a recessed low part of the sauna heater or infrared emitter.
– 14 – 60335-2-53 IEC:2011
7.101 The appliance shall be marked with instruction to replace infrared emitters with the
exact same manufacturer and model of emitter.
Compliance is checked by inspection.
8 Protection against access to live parts
This clause of Part 1 is applicable.
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.2 Addition:
The test is also carried out with the rock container empty unless the sauna heater is marked
with the warning concerning an inadequately filled rock container.
Modification:
Appliances normally placed on a floor in use, are placed on the floor as near to the walls as
possible, taking into account the instructions.
11.3 Addition:
Temperature rises in front of the sauna heater are measured on a movable wooden rod
painted dull black placed vertically on the floor. The rod has dimensions approximately 20 mm
by 20 mm and has sufficient length to extend at least 400 mm above the highest point of the
sauna heater or for sauna heaters containing rocks, the highest point of the rocks. The
distance between the rod and the heater is the minimum horizontal distance marked on the
heater. For infrared emitters, the vertical distance between the rod and the emitter is varied
so as to attain the highest temperature. The horizontal distance between the rod and the
emitter is the minimum horizontal distance stated in the instructions.
NOTE 101 If it is indicated that the minimum horizontal distance varies with the height from the floor, the
measurements are made accordingly.
11.7 Replacement:
Appliances are operated until steady conditions are established.
60335-2-53 IEC:2011 – 15 –
11.8 Modification:
The temperature rise of the wooden rod, walls, ceiling and floor of the sauna room or of the
prefabricated sauna shall not exceed 115 K.
The air outlet grill or guard of heaters for recessed installations shall not exceed 130 K rise, if
of metal.
In the sauna room or cabin, the temperature rises of handles, knobs, grips and similar parts
that are held for short periods only, are increased by 20 K.
NOTE 101 The ambient temperature is the temperature of the air outside the sauna room.
Addition:
For appliances provided with a humidifier, while the humidifier is in operation, the temperature
of the sauna room or cabin is reduced step by step by adjusting the temperature control. The
values of temperature and relative humidity at a point located 300 mm below the centre of the
ceiling in the sauna room shall not exceed the permissible range in Figure 101.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.1 Addition:
For sauna heaters of the thermal storage type, the tests are carried out at the end of the
charging period.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
– 16 – 60335-2-53 IEC:2011
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Addition:
The tests of 19.2 to 19.4 and 19.101 are carried out in the sauna room of Annex AA, the
volume being the maximum specified in the instructions or the volume shown in Table 101,
whichever is greater.
NOTE 101 This is not applicable to prefabricated saunas.
Table 101 – Volume of sauna room
Rated power input of Volume of the
a
sauna room
the sauna heater
m
kW
≤3,5
>3,5 and ≤5
>5 and ≤8
>8 and ≤10
>10 and ≤13
>13 and ≤16
>16 and ≤20
a
For intermediate values of rated power input, the
volume of the sauna room is determined by interpolation.
The test of 19.101 is carried out on sauna heaters intended to be used in public saunas
unless they form part of a sauna heating appliance or prefabricated sauna complying with
22.108 or are supplied with the instructions for sauna heaters for public saunas that may be
switched on by a separate remote-control system.
The test of 19.101 is also carried out on sauna heaters intended for household use and that
incorporate a stand-by mode setting for remote operation, unless they form part of a sauna
heating appliance or prefabricated sauna complying with 22.108.
Sauna heaters intended for a recessed installation and having air outlets in the wall of the
sauna room are also subjected to the test of 19.102.
Infrared emitters are also subjected to the test of 19.103.
19.2 Addition:
If the rock container is detachable or supplied separately, the test is carried out without the
container.
The test is carried out with any lid placed in the most unfavourable position.
For appliances provided with a humidifier, while the humidifier is in operation, the quantity of
air per hour drawn through the test sauna room is reduced to three times the volume of the
room. The thermostats and humidity controls, if any, are initially set to their maximum setting.
Then the temperature of the sauna room is reduced step by step by adjusting the temperature
control. The values of temperature and relative humidity at a point located 300 mm below the
centre of the ceiling in the sauna room shall not exceed the permissible range in Figure 102.
60335-2-53 IEC:2011 – 17 –
The test is repeated with the humidity control inoperative.
19.3 Addition:
Appliances are operated as specified in Clause 11 but under the conditions of 19.101, the
power input being 1,24 times rated power input.
19.13 Modification:
The temperature rise of the surfaces of walls, ceiling and floor of the sauna room and wooden
rod shall not exceed 140 K.
The compliance criteria relating to interlocks are not applicable.
Addition:
During the test of 19.101, the temperature rises of the surfaces of the sauna heater under the
blanket shall not exceed 180 K.
19.101 A woollen blanket having a specific mass of approximately 470 g/m and having the
same width as the sauna heater is placed from the wall, over the top surface and down the
entire front surface of the heater.
NOTE The blanket between the wall and the heater is allowed to drop behind the heater. Care is to be taken to
ensure that the blanket is not held away from the front of the heater.
The temperature rise of the surfaces of the sauna heater under the blanket is determined.
19.102 Sauna heaters intended for a recessed installation having air outlets in the wall of
the sauna room are operated as specified in Clause 11 with the air outlet covered.
The covering is made with felt strips each having a width of 100 mm and which are lined with
2 2
a single layer of textile material. The felt has a specific mass of 4 kg/m ± 0,4 kg/m and a
thickness of 25 mm.
The textile material consists of prewashed double-hemmed cotton sheet having a specific
2 2
mass between 140 g/m and 175 g/m in the dry condition. Thermocouples are attached to
the back of small blackened disks of copper or brass, 15 mm in diameter and 1 mm thick. The
disks are spaced 50 mm apart and placed between the textile material and the felt on the
vertical centre line of each strip. The disks are supported to prevent them from sinking into
the felt. The strips are applied
...
IEC 60335-2-53 ®
Edition 4.2 2021-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-53: Particular requirements for sauna heating appliances and infrared
cabins
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-53: Règles particulières pour les appareils de chauffage de saunas et
les cabines infrarouges
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IEC 60335-2-53 ®
Edition 4.2 2021-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colourcolour
insinsiidede
Household and similar electrical appliances – Safety –
Part 2-53: Particular requirements for sauna heating appliances and infrared
cabins
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-53: Règles particulières pour les appareils de chauffage de saunas et
les cabines infrarouges
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.100.10 ISBN 978-2-8322-9563-2
IEC 60335-2-53 ®
Edition 4.2 2021-03
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-53: Particular requirements for sauna heating appliances and infrared
cabins
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-53: Règles particulières pour les appareils de chauffage de saunas et
les cabines infrarouges
– 2 – IEC 60335-2-53:2011+AMD1:2017
+AMD2:2021 CSV IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 10
4 General requirement . 11
5 General conditions for the tests . 11
6 Classification . 12
7 Marking and instructions . 12
8 Protection against access to live parts . 15
9 Starting of motor-operated appliances . 15
10 Power input and current . 15
11 Heating . 15
12 Void. 16
13 Leakage current and electric strength at operating temperature . 16
14 Transient overvoltages . 17
15 Moisture resistance . 17
16 Leakage current and electric strength . 17
17 Overload protection of transformers and associated circuits . 17
18 Endurance . 17
19 Abnormal operation . 17
20 Stability and mechanical hazards . 20
21 Mechanical strength . 20
22 Construction . 21
23 Internal wiring . 24
24 Components . 24
25 Supply connection and external flexible cords . 24
26 Terminals for external conductors . 24
27 Provision for earthing . 24
28 Screws and connections . 24
29 Clearances, creepage distances and solid insulation . 25
30 Resistance to heat and fire . 25
31 Resistance to rusting . 25
32 Radiation, toxicity and similar hazards . 25
Annexes . 28
Annex R (normative) Software evaluation . 28
Annex AA (normative) Sauna room for testing sauna heating appliances . 29
Annex BB (normative) Estimation of the infrared radiation . 31
Bibliography . 33
Figure 101 – Temperature/relative humidity characteristic during normal operation . 25
+AMD2:2021 CSV IEC 2021
Figure 102 – Temperature/relative humidity characteristic during abnormal operation . 26
Figure 103 – Examples of different types of sauna heating appliances . 27
Figure AA.1 – Sauna room . 30
Table 101 – Volume of sauna room . 18
– 4 – IEC 60335-2-53:2011+AMD1:2017
+AMD2:2021 CSV IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-53: Particular requirements for sauna
heating appliances and infrared cabins
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.
This consolidated version of the official IEC Standard and its amendments has been
prepared for user convenience.
IEC 60335-2-53 edition 4.2 contains the fourth edition (2011-04) [documents
61/4135/FDIS and 61/4157/RVD], its amendment 1 (2017-01) [documents 61/5310/FDIS
and 61/5321/RVD] and its corrigendum (2017-03), and its amendment 2 (2021-03)
[documents 61/6129/FDIS and 61/6180/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendments 1 and 2. Additions are in green text, deletions are in
strikethrough red text. A separate Final version with all changes accepted is available
in this publication.
+AMD2:2021 CSV IEC 2021
International Standard IEC 60335-2-53 has been prepared by IEC technical committee 61:
Safety of household and similar electrical appliances.
This fourth edition constitutes a technical revision.
The principal changes in this edition as compared with the third edition of IEC 60335-2-53 are
as follows (minor changes are not listed):
– the scope is changed to cover infrared cabins;
– additional requirements for recessed sauna heaters are added;
– requirements of electronic interlocks are added (22.108).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fifth edition (2010) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electric sauna heating
appliances and infrared cabins.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states “addition”, “modification” or “replacement”,
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
– 6 – IEC 60335-2-53:2011+AMD1:2017
+AMD2:2021 CSV IEC 2021
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.
The following differences exist in the countries indicated below.
– 6.1: Class 0I appliances are allowed (Japan).
– 11.2: The temperature rises in front of the sauna heater are not measured (USA).
– 11.8: The temperature rise limits are different (USA).
– 13.2: Leakage current tests are carried out on sauna heaters having a supply cord (USA).
– 16.2: Leakage current tests are carried out on sauna heaters having a supply cord (USA).
– 19.1: The volume of the sauna room is different (USA).
– 19.5: The test is also carried out on appliances intended to be permanently connected to fixed wiring
(Norway).
– 19.101: Sauna heating appliances provided with a programmable timer are considered to be appliances that
are used remotely (Finland);
– 19.102: The test is not applicable (USA).
– 22.101: The mass of rocks is different (USA).
– 22.103: The requirement is not applicable (USA).
– 24.102: The 125 °C limit is not applicable (USA).
– 25.7: The supply cords are different (USA).
– Annex AA: The sauna room is different (USA).
IMPORTANT – The 'colour inside' logo on the cover page of this publication 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.
+AMD2:2021 CSV IEC 2021
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions. It also covers abnormal
situations that can be expected in practice and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
NOTE 1 For example, if sauna heating appliances within the scope of this part 2 include a humidifier unit, then
IEC 60335-2-98 is applicable as far as is reasonable.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 2 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 3 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
Electrotechnical Commission (IEC) draws attention to the fact that it is claimed that
compliance with this document may involve the use of a patent.
IEC takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured the IEC that he/she is willing to negotiate licences
under reasonable and non-discriminatory terms and conditions with applicants throughout the
world. In this respect, the statement of the holder of this patent right is registered with IEC.
Information may be obtained from:
Klafs GmbH & Co. KG
Markus Gaebele (markus.gaebele@klafs.de)
– 8 – IEC 60335-2-53:2011+AMD1:2017
+AMD2:2021 CSV IEC 2021
Address
Erich-Klafs-Straße 1-3
D-74523 Schwaebisch Hall
Germany
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights other than those identified above. IEC shall not be held responsible for
identifying any or all such patent rights.
IEC (http://patents.iec.ch) maintains on-line data bases of patents relevant to its standards.
Users are encouraged to consult the database for the most up to date information concerning
patents.
+AMD2:2021 CSV IEC 2021
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-53: Particular requirements for sauna
heating appliances and infrared cabins
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric sauna heating appliances and
infrared emitting units having a rated power input not exceeding 20 kW, their rated
voltage being not more than 250 V for single-phase appliances and 480 V for other
appliances.
The appliances covered by this standard are intended for use in the home and in public
saunas located in blocks of flats, hotels and similar locations.
NOTE 101 Sauna heating appliances may be of the thermal storage type.
This standard also deals with the safety of electric sauna heating appliances provided with a
humidifier unit, their rated voltage being not more than 250 V for single-phase appliances
and 480 V for other appliances. The room air is humidified by evaporating or atomising water.
NOTE 102 A humidifier may be part of a sauna heating appliance or may be incorporated in the sauna heater.
The sauna heating appliance or sauna heater may be operated with or without the humidifier.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
NOTE 103 Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 104 This standard does not apply to
– appliances intended to be used in locations where special conditions prevail, such as the presence of a
corrosive or explosive atmosphere (dust, vapour or gas);
– appliances intended to cause perspiration to only a part of the human body;
– sweating baths where the head of the user remains outside the heated space;
– tents and other collapsible sauna baths;
– room heaters (IEC 60335-2-30);
– humidifiers intended for use with heating, ventilation, or air-conditioning systems (IEC 60335-2-88);
– humidifiers (IEC 60335-2-98);
– appliances intended for medical purposes (IEC 60601).
– 10 – IEC 60335-2-53:2011+AMD1:2017
+AMD2:2021 CSV IEC 2021
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
ISO 3864-1, Graphical symbols – Safety colours and safety signs – Part 1: Design principles
for safety signs in workplaces and public areas
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions:
Sauna heating appliances, sauna heaters, infrared emitters and infrared emitting units
are installed in the sauna room specified in Annex AA and in accordance with the instructions.
The volume of the sauna room is the minimum value specified in the instructions.
The rock container is filled in accordance with the instructions. If the capacity of the rock
container is adjustable, the container is filled with the most unfavourable quantity of rocks. If
the rock container has a lid, the lid is positioned in accordance with the instructions.
Prefabricated saunas and prefabricated infrared cabins are installed in accordance with
the instructions.
3.101
sauna heater
appliance incorporating heating elements having a container filled with appropriate rocks
3.102
sauna heating appliance
appliance comprising a sauna heater, controls, protective devices and control board
3.103
prefabricated sauna
assembly comprising a sauna room and a sauna heating appliance
3.104
infrared emitter
assembly that emits infrared radiation
3.105
infrared emitting unit
appliance comprising at least one infrared emitter, controls, protective devices and control
board
3.106
prefabricated infrared cabin
assembly comprising a cabin and at least one infrared emitting unit
+AMD2:2021 CSV IEC 2021
3.107
fireguard
part of the enclosure of an infrared emitter through which the infrared emitter is normally
visible and which is intended to guard against direct access to the infrared emitter
3.108
time pre-selection
switching on a sauna heater within a prefabricated sauna with a delay
3.109
control board
unit connected to a sauna heater or an infrared emitter and intended to control a sauna
heater or an infrared emitter
Note 1 to entry: Control boards can include protective devices. Control boards can be integrated with a sauna
heater or connected with a cable to a sauna heater. See Figure 103.
3.110
programmable timer
time-based control which continues with a subsequent cycle when the preceding one has
been completed
3.111
supervised operation
supervision by monitoring person(s) who can be physically present to observe first-hand, or a
combination of physical presence and remote viewing of data to indicate condition and
operation of the appliance
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.2 Addition:
If the appliance comprises more than one sauna heater or more than one infrared emitter,
these are tested together.
5.3 Addition:
For appliances where both sauna and humidifying operation is possible, the tests for sauna
operation are made first, followed immediately by the tests for humidifying. The thermostats
and humidity controls, if any, are initially set to their maximum setting.
5.9 Addition:
Sauna heaters and infrared emitters shall be tested with the controls and control boards
specified in the instructions that give the most unfavourable results.
5.101 If a ventilating fan operates independently of the heating element, the tests are carried
out with or without the fan in operation, whichever is more unfavourable.
– 12 – IEC 60335-2-53:2011+AMD1:2017
+AMD2:2021 CSV IEC 2021
5.102 When a combination of sauna-heating appliances and infrared emitting units is to
be tested, the tests are carried out under the most unfavourable conditions.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Modification:
Appliances shall be class I, class II or class III.
6.2 Addition:
Appliances, controls, protective devices and control boards intended to be mounted inside a
sauna room shall be at least IPX4.
Electrical components of prefabricated saunas shall be at least IPX4.
Infrared emitters, controls and protective devices intended to be mounted inside a cabin
shall be at least IPX2.
Infrared emitters, controls and protective devices intended to be mounted inside a cabin in
combination with a sauna-heating appliance shall be at least IPX4.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Sauna heaters and infrared emitters shall be marked with symbol ISO 7000-0790 (2004-01)
or with the substance of the following:
Read operators manual.
They shall also be marked with
– the minimum distance between the top of the heater and the ceiling of the sauna room;
– the minimum distance between the bottom of the heater and the floor of the sauna room,
unless this distance is determined by the construction of the heater;
– the minimum horizontal distance between the heater and any combustible material of the
sauna room, including a protective rail, unless these distances are determined by the
construction of the heater;
– the maximum depth and minimum width of the recess for sauna heaters intended to be
installed in a recess.
Sauna heaters and infrared emitters shall be marked with symbol IEC 60417-5641
(2002-10) combined with the prohibition sign of ISO 3864-1, except for colours, or with the
substance of the following:
WARNING: Do not cover.
The inside wall of prefabricated saunas or prefabricated infrared cabins shall be marked
near the sauna heater or infrared emitter with the substance of the following:
+AMD2:2021 CSV IEC 2021
WARNING: Covering the heater or infrared emitter causes fire risk
Sauna heaters shall be marked with the substance of the following:
WARNING: An inadequately filled rock container causes fire risk
NOTE 101 This warning is not required if the sauna heater complies with Clause 11 without rocks in the
container.
7.6 Addition:
Do not cover
NOTE 101 This symbol incorporates symbol IEC 60417-5641(2002-10) combined with the prohibition sign of
ISO 3864-1, except for colours.
7.7 Addition:
Control boards shall have a connection diagram that gives details of the electrical connections
for controls and protective devices.
NOTE 101 The connection diagram may also show connections, other than those required, provided the
additional information does not cause confusion.
NOTE 102 If more than one control board is provided, the connection diagram may be divided so that each
control board has its own connection diagram and a reference to the other control boards.
7.12 Addition:
The instructions for sauna heaters shall state how to fill the rock container.
The instructions for sauna heating appliances and infrared emitting units for public saunas
and infrared cabins that do not have a timer or programmable timer shall state that the
appliance is to be continuously attended operated supervised. The instructions for other
sauna heating appliances and infrared emitting units that have a timer shall state that the
sauna room or infrared cabin is to shall be inspected before either restarting the timer or by
before switching on the appliance by a separate remote-control system.
Unless the sauna heater for public saunas complies with the test of 19.101, the instructions
for sauna heaters for public saunas and sauna heating appliances and infrared emitting
units for public saunas that may be switched on by a separate remote-control system shall
state that the sauna room or cabin is to be inspected before setting the appliance to a stand-
by mode for a delayed start.
The instructions for prefabricated infrared cabins and the instructions for prefabricated
saunas incorporating infrared emitters shall state that cleaning with steam cleaners, high
pressure cleaners and spraying water is not allowed.
If the appliances are marked with the symbol IEC 60417-5641 (2002-10) combined with the
prohibition sign of ISO 3864-1 except for colours, their meaning shall be explained.
The instructions for infrared emitters shall include the substance of the following:
• it is recommended that the infrared cabin should not be used within 24 h after UV radiation
exposure from artificial sources or sun-bathing;
– 14 – IEC 60335-2-53:2011+AMD1:2017
+AMD2:2021 CSV IEC 2021
• individuals who may be at risk from hyperthermia, such as individuals suffering from
cardiovascular disease, should seek medical advice before use of infrared warming
cabins;
• when persistent erythema (reddening of the skin lasting more than a day) and netlike
colour changes persist after regular exposure to infrared radiation, exposure should not be
repeated and medical advice should be sought to prevent development of erythema ab
igne;
• if you are a person with compromised heat pain sensation or under the influence of alcohol
or tranquilizers you should not use infrared warming cabins.
7.12.1 Addition:
The installation instructions of sauna heaters intended for a recessed installation shall give
details of the proper installation in a recessed area and state that means that prevent
combustible objects being placed on the top of the heater have to be installed in the air
channel above the heater.
NOTE 101 For example, an air outlet grill or guard spaced a minimum 40 mm from any heated surfaces beneath,
whose dimensions of the opening do not exceed 53 mm × 20 mm or 126 mm × 12 mm, is considered to be a
suitable means.
The installation instructions for prefabricated saunas and prefabricated infrared cabins
shall give details on how to assemble the appliance.
The installation instructions for sauna heating appliances and infrared emitting units shall
include the following details:
– the minimum and maximum volume, in cubic metres, of the sauna room or cabin in which
the sauna heater or infrared emitter is intended to be installed;
– the minimum height of the sauna room or cabin;
– the materials to be used for the walls and the ceiling of the sauna room or cabin;
– the arrangement of the separate protective rail, if applicable;
– the means of ventilating the sauna room or cabin;
– the installation of adjacent sauna heaters or infrared emitters or a statement that the
sauna heater or infrared emitter must be used alone;
– the connection and position of controls in the sauna room or cabin;
– that thermostat sensors shall be installed so that they are not influenced by incoming air;
– the installation of the control board, including a statement that the control board must be
mounted outside the sauna room or cabin (not necessary if the control board is at least
IPX4);
– the type of cable for supplying of the sauna heater or infrared emitter.
The instructions for infrared emitters shall state
• the minimum distance between the top of an infrared emitter and the ceiling of the cabin;
• the minimum distance between the bottom of an infrared emitter and the floor of the
cabin, unless this distance is determined by the construction of the infrared emitter;
• the minimum horizontal distance between an infrared emitter and any combustible
material of the cabin, including a protective rail, unless these distances are determined by
the construction of the infrared emitter;
• the minimum distance between adjacent infrared emitters.
The installation instructions for appliances for supervised operation in public saunas or
infrared cabins that do not have a timer shall state that a pilot lamp or similar indication
showing that the sauna heater or infrared emitter is switched on is to be installed in where
visible to the attendant's room monitoring person.
+AMD2:2021 CSV IEC 2021
Unless the sauna heater complies with the test of 19.101 or 19.102 as appropriate, the
installation instructions for sauna heating appliances or infrared emitting units that
incorporate a stand-by mode setting for remote operation shall state that the door of the
sauna room or infrared cabin shall be fitted with an interlock such that the stand-by mode
setting for remote operation is disabled if the sauna room door or infrared cabin door is
remote operation is set.
opened when the stand-by mode setting for
The instructions shall state the model number or type reference of controls and control
boards that can be used with a sauna heater or an infrared emitter.
7.14 Addition:
The marking of distances to combustible material of the sauna room or cabin shall be clearly
visible from the outside of the sauna heater or infrared emitter without removing covers.
The warnings concerning fire risks shall be visible after the sauna heater or infrared emitter
has been installed and the lettering shall have a height of at least
– 5 mm, for headings;
– 3 mm, for other lettering.
NOTE 101 These warnings may be placed on a recessed low part of the sauna heater or infrared emitter.
7.101 The appliance shall be marked with instruction to replace infrared emitters with the
exact same manufacturer and model of emitter.
Compliance is checked by inspection.
8 Protection against access to live parts
This clause of Part 1 is applicable.
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.2 Addition:
The test is also carried out with the rock container empty unless the sauna heater is marked
with the warning concerning an inadequately filled rock container.
The sauna room of Annex AA, prefabricated saunas and prefabricated infrared cabins are
installed away from the walls of the test corner.
Modification:
– 16 – IEC 60335-2-53:2011+AMD1:2017
+AMD2:2021 CSV IEC 2021
Appliances normally placed on a floor in use, are placed on the floor as near to the walls as
possible, taking into account the instructions.
11.3 Addition:
Temperature rises in front of the sauna heater are measured on a movable wooden rod
painted dull black placed vertically on the floor. The rod has dimensions approximately 20 mm
by 20 mm and has sufficient length to extend at least 400 mm above the highest point of the
sauna heater or for sauna heaters containing rocks, the highest point of the rocks. The
distance between the rod and the heater is the minimum horizontal distance marked on the
heater. For infrared emitters, the vertical distance between the rod and the emitter is varied
so as to attain the highest temperature. The horizontal distance between the rod and the
emitter is the minimum horizontal distance stated in the instructions.
NOTE 101 If it is indicated that the minimum horizontal distance varies with the height from the floor, the
measurements are made accordingly.
11.7 Replacement:
Appliances are operated until steady conditions are established.
11.8 Modification:
The temperature rise of the wooden rod, walls, ceiling and floor of the sauna room or of the
prefabricated sauna shall not exceed 115 K.
The temperature rise of the
– wooden rod;
– walls, ceiling and floor of the sauna room of Annex AA or of the prefabricated sauna;
shall not exceed 115 K.
The air outlet grill or guard of heaters for recessed installations shall not exceed 130 K rise, if
of metal.
In the sauna room of Annex AA or of the prefabricated sauna or of the cabin of the
prefabricated infrared cabin, the temperature rises of handles, knobs, grips and similar
parts that are held for short periods only, are increased by 20 K.
NOTE 101 The ambient temperature is the temperature of the air outside the sauna room.
The ambient temperature is the temperature of the air outside the sauna room of Annex AA or
of the pref
...
IEC 60335-2-53 ®
Edition 4.1 2017-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-53: Particular requirements for sauna heating appliances and infrared
cabins
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-53: Règles particulières pour les appareils de chauffage de saunas et les
cabines infrarouges
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IEC 60335-2-53 ®
Edition 4.1 2017-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-53: Particular requirements for sauna heating appliances and infrared
cabins
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-53: Règles particulières pour les appareils de chauffage de saunas et
les cabines infrarouges
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120; 97.100.10 ISBN 978-2-8322-3920-9
IEC 60335-2-53 ®
Edition 4.1 2017-01
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-53: Particular requirements for sauna heating appliances and infrared
cabins
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-53: Règles particulières pour les appareils de chauffage de saunas et les
cabines infrarouges
– 2 – IEC 60335-2-53:2011+AMD1:2017 CSV
IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 10
4 General requirement . 11
5 General conditions for the tests . 11
6 Classification . 11
7 Marking and instructions . 12
8 Protection against access to live parts . 15
9 Starting of motor-operated appliances . 15
10 Power input and current . 15
11 Heating . 15
12 Void. 16
13 Leakage current and electric strength at operating temperature . 16
14 Transient overvoltages . 16
15 Moisture resistance . 16
16 Leakage current and electric strength . 16
17 Overload protection of transformers and associated circuits . 16
18 Endurance . 16
19 Abnormal operation . 16
20 Stability and mechanical hazards . 19
21 Mechanical strength . 19
22 Construction . 20
23 Internal wiring . 22
24 Components . 22
25 Supply connection and external flexible cords . 22
26 Terminals for external conductors . 23
27 Provision for earthing . 23
28 Screws and connections . 23
29 Clearances, creepage distances and solid insulation . 23
30 Resistance to heat and fire . 23
31 Resistance to rusting . 23
32 Radiation, toxicity and similar hazards . 23
Annexes . 25
Annex R (normative) Software evaluation . 25
Annex AA (normative) Sauna room for testing sauna heating appliances . 26
Annex BB (normative) Estimation of the infrared radiation . 28
Bibliography . 30
Figure 101 – Temperature/relative humidity characteristic during normal operation . 24
IEC 2017
Figure 102 – Temperature/relative humidity characteristic during abnormal operation . 24
Figure AA.1 – Sauna room . 27
Table 101 – Volume of sauna room . 17
– 4 – IEC 60335-2-53:2011+AMD1:2017 CSV
IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-53: Particular requirements for sauna
heating appliances and infrared cabins
FOREWORD
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This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC 60335-2-53 edition 4.1 contains the fourth edition (2011-04) [documents 61/4135/FDIS and
61/4157/RVD] and its amendment 1 (2017-01) [documents 61/5310/FDIS and 61/5321/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
IEC 2017
International Standard IEC 60335-2-53 has been prepared by IEC technical committee 61:
Safety of household and similar electrical appliances.
This fourth edition constitutes a technical revision.
The principal changes in this edition as compared with the third edition of IEC 60335-2-53 are
as follows (minor changes are not listed):
– the scope is changed to cover infrared cabins;
– additional requirements for recessed sauna heaters are added;
– requirements of electronic interlocks are added (22.108).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fifth edition (2010) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electric sauna heating
appliances and infrared cabins.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states “addition”, “modification” or “replacement”,
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
– 6 – IEC 60335-2-53:2011+AMD1:2017 CSV
IEC 2017
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.
The following differences exist in the countries indicated below.
– 6.1: Class 0I appliances are allowed (Japan).
– 11.2: The temperature rises in front of the sauna heater are not measured (USA).
– 11.8: The temperature rise limits are different (USA).
– 13.2: Leakage current tests are carried out on sauna heaters having a supply cord (USA).
– 16.2: Leakage current tests are carried out on sauna heaters having a supply cord (USA).
– 19.1: The volume of the sauna room is different (USA).
– 19.5: The test is also carried out on appliances intended to be permanently connected to fixed wiring
(Norway).
– 19.102: The test is not applicable (USA).
– 22.101: The mass of rocks is different (USA).
– 22.103: The requirement is not applicable (USA).
– 24.102: The 125 °C limit is not applicable (USA).
– 25.7: The supply cords are different (USA).
– Annex AA: The sauna room is different (USA).
The contents of the corrigendum of March 2017 have been included in this copy.
IMPORTANT – The 'colour inside' logo on the cover page of this publication 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.
IEC 2017
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions. It also covers abnormal
situations that can be expected in practice and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
NOTE 1 For example, if sauna heating appliances within the scope of this part 2 include a humidifier unit, then
IEC 60335-2-98 is applicable as far as is reasonable.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 2 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 3 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
Electrotechnical Commission (IEC) draws attention to the fact that it is claimed that
compliance with this document may involve the use of a patent.
IEC takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured the IEC that he/she is willing to negotiate licences
under reasonable and non-discriminatory terms and conditions with applicants throughout the
world. In this respect, the statement of the holder of this patent right is registered with IEC.
Information may be obtained from:
Klafs GmbH & Co. KG
Markus Gaebele (markus.gaebele@klafs.de)
– 8 – IEC 60335-2-53:2011+AMD1:2017 CSV
IEC 2017
Address
Erich-Klafs-Straße 1-3
D-74523 Schwaebisch Hall
Germany
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights other than those identified above. IEC shall not be held responsible for
identifying any or all such patent rights.
IEC (http://patents.iec.ch) maintains on-line data bases of patents relevant to its standards.
Users are encouraged to consult the database for the most up to date information concerning
patents.
IEC 2017
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-53: Particular requirements for sauna
heating appliances and infrared cabins
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric sauna heating appliances and
infrared emitting units having a rated power input not exceeding 20 kW, their rated
voltage being not more than 250 V for single-phase appliances and 480 V for other
appliances.
The appliances covered by this standard are intended for use in the home and in public
saunas located in blocks of flats, hotels and similar locations.
NOTE 101 Sauna heating appliances may be of the thermal storage type.
This standard also deals with the safety of electric sauna heating appliances provided with a
humidifier unit, their rated voltage being not more than 250 V for single-phase appliances
and 480 V for other appliances. The room air is humidified by evaporating or atomising water.
NOTE 102 A humidifier may be part of a sauna heating appliance or may be incorporated in the sauna heater.
The sauna heating appliance or sauna heater may be operated with or without the humidifier.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
NOTE 103 Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 104 This standard does not apply to
– appliances intended to be used in locations where special conditions prevail, such as the presence of a
corrosive or explosive atmosphere (dust, vapour or gas);
– appliances intended to cause perspiration to only a part of the human body;
– sweating baths where the head of the user remains outside the heated space;
– tents and other collapsible sauna baths;
– room heaters (IEC 60335-2-30);
– humidifiers intended for use with heating, ventilation, or air-conditioning systems (IEC 60335-2-88);
– humidifiers (IEC 60335-2-98);
– appliances intended for medical purposes (IEC 60601).
– 10 – IEC 60335-2-53:2011+AMD1:2017 CSV
IEC 2017
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
ISO 3864-1, Graphical symbols – Safety colours and safety signs – Part 1: Design principles
for safety signs in workplaces and public areas
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions:
Sauna heating appliances, sauna heaters, infrared emitters and infrared emitting units
are installed in the sauna room specified in Annex AA and in accordance with the instructions.
The volume of the sauna room is the minimum value specified in the instructions.
The rock container is filled in accordance with the instructions. If the capacity of the rock
container is adjustable, the container is filled with the most unfavourable quantity of rocks. If
the rock container has a lid, the lid is positioned in accordance with the instructions.
Prefabricated saunas and prefabricated infrared cabins are installed in accordance with
the instructions.
3.101
sauna heater
appliance incorporating heating elements having a container filled with appropriate rocks
3.102
sauna heating appliance
appliance comprising a sauna heater, controls, protective devices and control board
3.103
prefabricated sauna
assembly comprising a sauna room and a sauna heating appliance
3.104
infrared emitter
assembly that emits infrared radiation
3.105
infrared emitting unit
appliance comprising at least one infrared emitter, controls, protective devices and control
board
3.106
prefabricated infrared cabin
assembly comprising a cabin and at least one infrared emitting unit
IEC 2017
3.107
fireguard
part of the enclosure of an infrared emitter through which the infrared emitter is normally
visible and which is intended to guard against direct access to the infrared emitter
3.108
time pre-selection
switching on a sauna heater within a prefabricated sauna with a delay
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.2 Addition:
If the appliance comprises more than one sauna heater or more than one infrared emitter,
these are tested together.
5.3 Addition:
For appliances where both sauna and humidifying operation is possible, the tests for sauna
operation are made first, followed immediately by the tests for humidifying. The thermostats
and humidity controls, if any, are initially set to their maximum setting.
5.101 If a ventilating fan operates independently of the heating element, the tests are carried
out with or without the fan in operation, whichever is more unfavourable.
5.102 When a combination of sauna-heating appliances and infrared emitting units is to
be tested, the tests are carried out under the most unfavourable conditions.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Modification:
Appliances shall be class I, class II or class III.
6.2 Addition:
Appliances, controls, protective devices and control boards intended to be mounted inside a
sauna room shall be at least IPX4.
Electrical components of prefabricated saunas shall be at least IPX4.
Infrared emitters, controls and protective devices intended to be mounted inside a cabin
shall be at least IPX2.
Infrared emitters, controls and protective devices intended to be mounted inside a cabin in
combination with a sauna-heating appliance shall be at least IPX4.
– 12 – IEC 60335-2-53:2011+AMD1:2017 CSV
IEC 2017
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Sauna heaters and infrared emitters shall be marked with symbol ISO 7000-0790 (2004-01)
or with the substance of the following:
Read operators manual.
They shall also be marked with
– the minimum distance between the top of the heater and the ceiling of the sauna room;
– the minimum distance between the bottom of the heater and the floor of the sauna room,
unless this distance is determined by the construction of the heater;
– the minimum horizontal distance between the heater and any combustible material of the
sauna room, including a protective rail, unless these distances are determined by the
construction of the heater;
– the maximum depth and minimum width of the recess for sauna heaters intended to be
installed in a recess.
Sauna heaters and infrared emitters shall be marked with symbol IEC 60417-5641
(2002-10) combined with the prohibition sign of ISO 3864-1, except for colours, or with the
substance of the following:
WARNING: Do not cover.
The inside wall of prefabricated saunas or prefabricated infrared cabins shall be marked
near the sauna heater or infrared emitter with the substance of the following:
WARNING: Covering the heater or infrared emitter causes fire risk
Sauna heaters shall be marked with the substance of the following:
WARNING: An inadequately filled rock container causes fire risk
NOTE 101 This warning is not required if the sauna heater complies with Clause 11 without rocks in the
container.
7.6 Addition:
Do not cover
NOTE 101 This symbol incorporates symbol IEC 60417-5641(2002-10) combined with the prohibition sign of
ISO 3864-1, except for colours.
7.7 Addition:
Control boards shall have a connection diagram that gives details of the electrical connections
for controls and protective devices.
IEC 2017
NOTE 101 The connection diagram may also show connections, other than those required, provided the
additional information does not cause confusion.
NOTE 102 If more than one control board is provided, the connection diagram may be divided so that each
control board has its own connection diagram and a reference to the other control boards.
7.12 Addition:
The instructions for sauna heaters shall state how to fill the rock container.
The instructions for appliances for public saunas that do not have a timer shall state that the
appliance is to be continuously attended. The instructions for other sauna heating
appliances and infrared emitting units shall state that the sauna room or cabin is to be
inspected before either restarting the timer or by switching on the appliance by a separate
remote-control system.
Unless the sauna heater for public saunas complies with the test of 19.101, the instructions
for sauna heaters for public saunas and sauna heating appliances and infrared emitting
units for public saunas that may be switched on by a separate remote-control system shall
state that the sauna room or cabin is to be inspected before setting the appliance to a stand-
by mode for a delayed start.
The instructions for prefabricated infrared cabins and the instructions for prefabricated
saunas incorporating infrared emitters shall state that cleaning with steam cleaners, high
pressure cleaners and spraying water is not allowed.
If the appliances are marked with the symbol IEC 60417-5641 (2002-10) combined with the
prohibition sign of ISO 3864-1 except for colours, their meaning shall be explained.
The instructions for infrared emitters shall include the substance of the following:
• it is recommended that the infrared cabin should not be used within 24 h after UV radiation
exposure from artificial sources or sun-bathing;
• individuals who may be at risk from hyperthermia, such as individuals suffering from
cardiovascular disease, should seek medical advice before use of infrared warming
cabins;
• when persistent erythema (reddening of the skin lasting more than a day) and netlike
colour changes persist after regular exposure to infrared radiation, exposure should not be
repeated and medical advice should be sought to prevent development of erythema ab
igne;
• if you are a person with compromised heat pain sensation or under the influence of alcohol
or tranquilizers you should not use infrared warming cabins.
7.12.1 Addition:
The installation instructions of sauna heaters intended for a recessed installation shall give
details of the proper installation in a recessed area and state that means that prevent
combustible objects being placed on the top of the heater have to be installed in the air
channel above the heater.
NOTE 101 For example, an air outlet grill or guard spaced a minimum 40 mm from any heated surfaces beneath,
whose dimensions of the opening do not exceed 53 mm × 20 mm or 126 mm × 12 mm, is considered to be a
suitable means.
The installation instructions for prefabricated saunas and prefabricated infrared cabins
shall give details on how to assemble the appliance.
The installation instructions for sauna heating appliances and infrared emitting units shall
include the following details:
– 14 – IEC 60335-2-53:2011+AMD1:2017 CSV
IEC 2017
– the minimum and maximum volume, in cubic metres, of the sauna room or cabin in which
the sauna heater or infrared emitter is intended to be installed;
– the minimum height of the sauna room or cabin;
– the materials to be used for the walls and the ceiling of the sauna room or cabin;
– the arrangement of the separate protective rail, if applicable;
– the means of ventilating the sauna room or cabin;
– the installation of adjacent sauna heaters or infrared emitters or a statement that the
sauna heater or infrared emitter must be used alone;
– the connection and position of controls in the sauna room or cabin;
– that thermostat sensors shall be installed so that they are not influenced by incoming air;
– the installation of the control board, including a statement that the control board must be
mounted outside the sauna room or cabin (not necessary if the control board is at least
IPX4);
– the type of cable for supplying of the sauna heater or infrared emitter.
The instructions for infrared emitters shall state
• the minimum distance between the top of an infrared emitter and the ceiling of the cabin;
• the minimum distance between the bottom of an infrared emitter and the floor of the
cabin, unless this distance is determined by the construction of the infrared emitter;
• the minimum horizontal distance between an infrared emitter and any combustible
material of the cabin, including a protective rail, unless these distances are determined by
the construction of the infrared emitter;
• the minimum distance between adjacent infrared emitters.
The installation instructions for appliances for public saunas or infrared cabins that do not
have a timer shall state that a pilot lamp showing that the heater or infrared emitter is
switched on is to be installed in the attendant's room.
Unless the sauna heater complies with the test of 19.101, the installation instructions for
sauna heating appliances or infrared emitting units that incorporate a stand-by mode
setting for remote operation shall state that the door of the sauna room or cabin shall be
fitted with an interlock such that the stand-by mode setting for remote operation is disabled if
the sauna door or cabin door is opened when the stand-by mode setting for remote operation
is set.
7.14 Addition:
The marking of distances to combustible material of the sauna room or cabin shall be clearly
visible from the outside of the sauna heater or infrared emitter without removing covers.
The warnings concerning fire risks shall be visible after the sauna heater or infrared emitter
has been installed and the lettering shall have a height of at least
– 5 mm, for headings;
– 3 mm, for other lettering.
NOTE 101 These warnings may be placed on a recessed low part of the sauna heater or infrared emitter.
7.101 The appliance shall be marked with instruction to replace infrared emitters with the
exact same manufacturer and model of emitter.
Compliance is checked by inspection.
IEC 2017
8 Protection against access to live parts
This clause of Part 1 is applicable.
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.2 Addition:
The test is also carried out with the rock container empty unless the sauna heater is marked
with the warning concerning an inadequately filled rock container.
Modification:
Appliances normally placed on a floor in use, are placed on the floor as near to the walls as
possible, taking into account the instructions.
11.3 Addition:
Temperature rises in front of the sauna heater are measured on a movable wooden rod
painted dull black placed vertically on the floor. The rod has dimensions approximately 20 mm
by 20 mm and has sufficient length to extend at least 400 mm above the highest point of the
sauna heater or for sauna heaters containing rocks, the highest point of the rocks. The
distance between the rod and the heater is the minimum horizontal distance marked on the
heater. For infrared emitters, the vertical distance between the rod and the emitter is varied
so as to attain the highest temperature. The horizontal distance between the rod and the
emitter is the minimum horizontal distance stated in the instructions.
NOTE 101 If it is indicated that the minimum horizontal distance varies with the height from the floor, the
measurements are made accordingly.
11.7 Replacement:
Appliances are operated until steady conditions are established.
11.8 Modification:
The temperature rise of the wooden rod, walls, ceiling and floor of the sauna room or of the
prefabricated sauna shall not exceed 115 K.
The air outlet grill or guard of heaters for recessed installations shall not exceed 130 K rise, if
of metal.
In the sauna room or cabin, the temperature rises of handles, knobs, grips and similar parts
that are held for short periods only, are increased by 20 K.
– 16 – IEC 60335-2-53:2011+AMD1:2017 CSV
IEC 2017
NOTE 101 The ambient temperature is the temperature of the air outside the sauna room.
Addition:
For appliances provided with a humidifier, while the humidifier is in operation, the temperature
of the sauna room or cabin is reduced step by step by adjusting the temperature control. The
values of temperature and relative humidity at a point located 300 mm below the centre of the
ceiling in the sauna room shall not exceed the permissible range in Figure 101.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.1 Addition:
For sauna heaters of the thermal storage type, the tests are carried out at the end of the
charging period.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Addition:
The tests of 19.2 to 19.4 and 19.101 are carried out in the sauna room of Annex AA, the
volume being the maximum specified in the instructions or the volume shown in Table 101,
whichever is greater.
NOTE 101 This is not applicable to prefabricated saunas.
IEC 2017
Table 101 – Volume of sauna room
Rated power input of Volume of the
a
sauna room
the sauna heater
m
kW
≤3,
...
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