Standards for humidifiers, dehumidifiers, water heaters, and animal heaters all revolve around electrical appliances used for heating with a rated voltage of no more than 250V single-phase or 480V for other appliances. Although differences exist in their structures and applications, these are all drawn together through their similarities. Safety is incredibly important when designing and manufacturing products that produce large amounts of heat that might be used by or are intended for laymen in shops, farms, light industry, or other such environments.
IEC 60335-2-21:2022 deals with the safety of electric storage water heaters for household and similar purposes and intended for heating water below boiling temperature, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances including direct current (DC) supplied appliances and battery-operated appliances. This standard also deals with: – appliances not intended for normal household use, but which nevertheless possibly pose a source of danger to the public, such as appliances intended to be used by laymen in shops and on farms; – immersion heater units intended to be retrofitted in a heat exchange closed water heater having provision for retrofitting. Additional requirements are given in Annex AA. 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. Attention is drawn to the fact that – for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements can 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; – in many countries regulations exist for the installation of equipment connected to the water mains. This standard does not apply to – appliances for boiling water (IEC 60335-2-15); – instantaneous water heaters (IEC 60335-2-35); – commercial dispensing appliances and vending machines (IEC 60335-2-75); – appliances intended exclusively for industrial purposes; – 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). This seventh edition cancels and replaces the sixth edition published in 2012 and Amendment 1:2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the text has been aligned with IEC 60335-1:2020; b) some notes have been converted to normative text (Clause 1, 5.2, 15.3, 19.1, 19.2, 19.3, 19.4, 22.47, 22.104, 22.110, Annex AA introduction); c) updated requirement restricting use of appliance inlets (25.1). This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its amendments unless that edition precludes it; in that case, the latest edition that does not preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
IEC 60335-2-35:2012 deals with the safety of electric instantaneous water heaters for household and similar purposes and intended for heating water below boiling temperature, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances. Instantaneous water heaters incorporating bare heating elements are within the scope of this standard. Appliances not intended for normal household use but that nevertheless may be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. 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 or children playing with the appliance. This fifth edition cancels and replaces the fourth edition published in 2002, including its Amendment 1 (2006) and its Amendment 2 (2009). The principal changes in this edition as compared with the fourth edition of IEC 60335-2-31 are as follows: - converted notes to normative text (7.12, 7.102, 8.1.5, 22.104, and 22.109.3); - deleted notes in 19.13, 22.109, and A.101; - added Annex R and 22.108 for appliances with programmable electronic circuits and added requirements for water heaters (22.50, 22.51). 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. Keywords: Water heater, Instantaneous, open-outlet, bare-element. This publication is to be read in conjunction with IEC 60335-1:2010 .
IEC 60335-2-40:2024 deals with the safety of electric heat pumps, sanitary hot water heat pumps and air conditioners, incorporating motor-compressors as well as hydronic fan coils units, dehumidifiers (with or without motor-compressors), thermoelectric heat pumps and partial units, their maximum rated voltage being not more than 300 V for single phase appliances and 600 V for other appliances including direct current (DC) supplied appliances and battery-operated appliances. Appliances not intended for normal household use but which nevertheless can be a source of danger to the public, such as appliances intended to be used by laypersons in shops, in light industry and on farms, are within the scope of this standard. The appliances referenced above can consist of one or more factory-made assemblies. If provided in more than one assembly, the separate assemblies are used together, and the requirements are based on the use of matched assemblies. A definition of ‘motor-compressor’ is given in IEC 60335-2-34, which includes the statement that the term motor-compressor is used to designate either a hermetic motor-compressor or semi-hermetic motor-compressor. Requirements for containers intended for storage of the heated water included in sanitary hot water heat pumps are, in addition, covered by IEC 60335-2-21. This standard does not take into account refrigerants other than group A1, A2L, A2 and A3 as defined by ISO 817. Flammable refrigerants are limited to those of a molar mass of more than or equal to 42 kg/kmol based on WCF (worst case formulation) as specified in ISO 817. As far as practical, this standard deals with common hazards presented by appliances that are encountered in normal use and assumes that installation, servicing, decommissioning, and disposal are safely handled by competent persons and accidental release of refrigerants is avoided. However, it does not specify the criteria to ensure competence of persons during installation, servicing and disposal. Safety requirements during disposal are not specified in this standard. Annex HH provides informative requirements on competence of personnel. Criteria for competence of personnel for the purpose of certification schemes can be found in ISO 22712. Unless specifications are covered by this standard, including the annexes, requirements for refrigerating safety are covered by: – ISO 5149-1:2014, ISO 5149-1:2014/AMD1:2015, and ISO 5149-1:2014/AMD2:2021, – ISO 5149-2:2014 and ISO 5149-2:2014/AMD1:2020, – ISO 5149-3:2014 and ISO 5149-3:2014/AMD1:2021. Supplementary heaters, or a provision for their separate installation, are within the scope of this standard, but only heaters which are designed as a part of the appliance package, the controls being incorporated in the appliance. Attention is drawn to the fact that – for appliances intended to be used in vehicles or on-board ships or aircraft, additional requirements can be necessary; – in many countries, additional requirements are specified, for example, by the national health authorities responsible for the protection of labour and the national authorities responsible for storage, transportation, building constructions and installations. This standard does not apply to – humidifiers intended for use with heating and cooling equipment (IEC 60335-2-88); – appliances designed exclusively for industrial processing; – 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). This eighth edition cancels and replaces the seventh edition published in 2022. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Clause 12 : Part 1, Clause 12 has been made applicable; b) Clause 19: requirement added for double wall heat exchangers to be resistant against freezing; c) Clause 20: requirement modified for when to apply test probe 18; d) Clause 21: requirement added for double wall heat exchangers to resistant against the pressure of the refrigerant if one of the walls fails; e) Clause 22: requirement modified to reflect that appliances can operate continuously and can be operated remotely without giving rise to a hazard, and requirement added for double wall heat exchangers to be constructed to avoid refrigerant leaking into the secondary circuit; f) Annex LL has been deleted and replaced by a reference to IEC TS 63542:2024. This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its amendments unless that edition precludes it; in that case, the latest edition that does not preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
IEC 60335-2-71:2018 deals with the safety of all kinds of electrical heating appliances used for livestock rearing and breeding, such as: heat-radiating appliances, electrical sitting-hens, incubators, chicken breeding units and heating plates for animals, the rated voltage of the appliances being not more than 250 V for single-phase appliances and 480 V for other appliances. This standard applies to heating appliances used for livestock rearing and breeding that include an electrical motor. This standard does not apply to: - appliances designed exclusively for industrial purposes; - 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); - heating units embedded in the floor; - flexible sheet heating elements for room heating (IEC 60335-2-96); - room heaters (IEC 60335-2-30). This third edition cancels and replaces the second edition published in 2002, its Amendment 1 (2007) and its Amendment 2 (2012). This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - two paragraphs are deleted (Introduction); - normative references updated (Clause 2); - colour required for symbols (7.6); - some notes converted to normative text (19.2, 21.101, 22.104).
IEC 60335-2-87:2016 deals with the safety of electric animal-stunning equipment the rated voltage of which is not more than 250 V for single-phase appliances and 480 V for other appliances. Battery-operated appliances and other d.c. supplied appliances are within the scope of this standard. Dual supply appliances, either mains-supplied or battery-operated, are regarded as battery-operated appliances when operated in the battery mode. This standard is applicable to electric animal-stunning equipment for industrial or commercial use, for use on farms or for use in areas where they may be a source of danger to the public. So far as is practical, this standard deals with the common hazards presented by these types of appliances. Examples of electric animal-stunning equipment within the scope of this standard are those used to stun: - bovines such as cattle, calves, cows, heifers and bulls; - ovines such as sheep and lambs; - caprines such as goats; - cervids such as deer; - solipeds such as horses, donkeys and mules; - birds such as chickens, turkeys and guinea fowl; - porcines such as pigs; - fur animals such as foxes, chinchilla, rabbits and possums; - mustelids such as mink and polecats and other ruminants such as camels. The following types of electric animal-stunning equipment are covered by this standard: manual, semi-automatic and automatic. This third edition cancels and replaces the second edition published in 2002 including its Amendment 1 (2007) and its Amendment 2 (2012). This edition constitutes a technical revision. The principal changes in this edition as compared with the second edition of IEC 60335-2-87 are as follows (minor changes are not listed): - Warning sign ISO 7010-W012 has been introduced (7.1, 7.6, 7.12, 7.14). - Reference to IEC 60068-2-32 has been replaced by reference to IEC 60068-2-31 (21.1). - Additional requirements for battery operated stunning have been transferred to Annex S (5.8.1, 7.1, 7.8, 7.12, 11.5, 16, 22.102, 25.5, 25.7, 25.20, 25.23, 25.101, 26.5). It was established on the basis of the fifth edition (2010) of that standard. 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 standard be adopted for implementation nationally not earlier than 12 months or later than 36 months from the date of its publication. Key words: Electrical, Stunning Equipment. Animal, Electrode This publication is to be read in conjunction with IEC 60335-1:2010 .
Deals with the safety of electric humidifiers intended for use with heating, ventilation, or air-conditioning systems in household, commercial, and light industrial applications (may include large stand alone commercial equipment)which operate according to the evaporative or atomization system, water-injection, steam and the like. The rated voltage being not more than 250 V for single-phase and 600 V for all other appliances.
"Deals with the safety of electric humidifiers for household and similar use, their rated voltage being not more than 250 V for single-phase and 480 V for other appliances. Examples of appliances that are within the scope of this standard are appliances that atomize water; appliances that evaporate water by heating and appliances that blow air through a moist element. This consolidated version consists of the second edition (2002), its amendment 1 (2004) and its amendment 2 (2008). Therefore, no need to order amendments in addition to this publication. "