SIST EN 300 019-1-3 V3.1.1:2026

• Abstract:

  The present document defines classes of environmental conditions and their severities to which telecommunication equipment may be exposed. The severities specified are those which will have a low probability of being exceeded; generally less than 1 % of the operating time in a year. The present document applies to equipment mounted for stationary use including periods of erection work, down time, maintenance and repair at weatherprotected locations defined in clause 5.

• Status: Published
• Public Enquiry End Date: 30-Apr-2026
• Publication Date: 01-Sep-2026
• ICS: 19.040 - Environmental testing
• ICS: 33.050.01 - Telecommunication terminal equipment in general
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 25-May-2026
• Due Date: 30-Jul-2026
• Completion Date: 02-Sep-2026
• Mandate: M/462
• Ref Project: ETSI EN 300 019-1-3 V3.1.0 (2026-02) - Environmental Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment; Part 1: Classification of environmental conditions; Sub-part 3: Stationary use at weatherprotected locations

SIST EN 300 019-1-3 V3.1.1:2026 is the Slovenski national adoption of ETSI EN 300 019-1-3 V3.1.1 (2026-05), published by SIST. It classifies environmental conditions and severities for telecommunications equipment used for stationary use at weatherprotected locations, so engineers, test labs and buyers can match equipment to the site environment.

What does SIST EN 300 019-1-3 V3.1.1:2026 specify?

SIST EN 300 019-1-3 V3.1.1:2026 specifies environmental classes and the severities associated with stationary use at weatherprotected locations. It is a classification document, while the related test severities and test methods are covered in Part 2 of the same multi-part series.

The standard applies to equipment mounted for stationary use, including erection work, downtime, maintenance and repair. The severities are intended to represent conditions with a low probability of being exceeded, generally less than 1% of operating time in a year.

The document is organized into these main clauses and annexes:

• Clause 1 - Scope
• Clause 2 - References
• Clause 3 - Definition of terms, symbols and abbreviations
• Clause 4 - Environmental classes
• Clause 5 - Environmental conditions
• Annex A - Bibliography
• Annex B - Change history

What are the key requirements of SIST EN 300 019-1-3 V3.1.1:2026?

The core of SIST EN 300 019-1-3 V3.1.1:2026 is the definition of three environmental classes for weatherprotected stationary locations: 3.10, 3.11 and 3.12. Each class combines climatic, biological, chemical, mechanical and seismic conditions, and the tables in Clause 5 give the associated severities.

Environmental class selection in Clause 4

Clause 4 defines:

• Class 3.10 - temperature-controlled enclosed locations having no humidity control
• Class 3.11 - enclosed locations having no temperature or humidity control
• Class 3.12 - locations having neither temperature nor humidity control

This matters because the class defines the expected site environment for equipment planning, product design and acceptance testing. Class 3.10 is the most controlled indoor case, while Classes 3.11 and 3.12 allow progressively harsher exposure, including condensation and icing in Class 3.12.

Climatic conditions in Clause 5.1

Clause 5.1 and Table 1 set the climatic severities for temperature, humidity, air pressure, solar radiation, movement of surrounding air, condensation, water exposure and formation of ice and frost. The climatograms in Figures 1 to 3 show how the temperature and humidity combinations are grouped for each class.

In practice, this tells the reader what the installation site must tolerate and what the equipment should be built and qualified for. The note on Class 3.10E is important because it describes exceptional climatic conditions associated with failure of temperature control, but it is not a separate class.

Biological, chemical and mechanically active substances

Clause 5.2 and Table 2 distinguish biological exposure for flora and fauna. For Class 3.10, the conditions are more controlled; for Classes 3.11 and 3.12, the table allows mould, fungus, rodents and other damaging animals.

Clause 5.3 and Table 3 cover chemically active substances such as sulphur dioxide, nitrogen dioxide, nitric acid, ozone, hydrogen sulphide, chlorine, chlorine ion, ammonia, particles, dust deposits and soot. The table also identifies a special C3 case and notes that individual parameters may be selected when the combined special class is not used.

Clause 5.4 and Table 4 cover setting dust, turbulent dust and windblown dust. Clause 5.5 and Table 5 cover stationary random vibration and shock. This is what a designer uses to decide enclosure protection, mounting strength and whether the equipment can stay stable on light supporting structures.

Earthquake conditions in Clause 5.6

Clause 5.6 defines earthquake conditions using a Response Spectrum (RS) approach and the concept of Zero Period Acceleration (ZPA). It refers to earthquake intensity, superelevation factor, direction factor and geometric factor, then gives the seismic severities and the corresponding RS in Table 6, Figure 4 and Table 7.

For users, this means seismic qualification is not just a single shock value - it is a structured description of expected mounting motion. That is useful for site design, test specification and customer requirements when earthquake conditions are part of the project.

What terms does SIST EN 300 019-1-3 V3.1.1:2026 define?

SIST EN 300 019-1-3 V3.1.1:2026 defines several terms that shape how the classes are interpreted.

• absolute humidity - the mass of water vapour in one cubic metre of dry air mixture; it matters because temperature and humidity limits are linked.
• cooling system - a system that controls climate by lowering air temperature only; the note says it can also reduce absolute humidity.
• heating system - a system that controls climate by raising air temperature only; the note says it can reduce relative humidity.
• stationary use - equipment mounted firmly on a structure, mounting device or permanent site; this tells the reader the standard is not for portable use.
• weatherprotected location - a location where equipment is protected from direct weather influences; the standard distinguishes totally weatherprotected and partly weatherprotected cases.
• Response Spectrum (RS) - the spectral description used to express earthquake motion seen by mounted equipment.
• Zero Period Acceleration (ZPA) - the high-frequency asymptotic acceleration of the RS, used as a seismic severity indicator.

Who uses SIST EN 300 019-1-3 V3.1.1:2026?

SIST EN 300 019-1-3 V3.1.1:2026 is used by people who specify, design, test or buy telecommunications equipment for fixed installations. Typical users include equipment designers, environmental test laboratories, site planners, quality managers, procurement teams and compliance engineers.

They use it to classify installation environments, agree on expected climatic and mechanical exposure, and decide what environmental test profile or product robustness is needed. It is also relevant for telecommunications centres, data centres, computer halls, offices, workshops, storage rooms and similar enclosed locations identified in the class descriptions.

What changed in SIST EN 300 019-1-3 V3.1.1:2026 from the previous edition?

The change history states that the environmental classes were revised based on IEC 60721-3-3:2019. It also states that the new classes are not comparable with the previous classes taken from IEC 60721-3-3:2002, so the new environmental classes were given new numbers.

Which standards are used with SIST EN 300 019-1-3 V3.1.1:2026?

The normative references named in Clause 2 are part of how SIST EN 300 019-1-3 V3.1.1:2026 is applied:

• IEC 60721-2-6:2022 - provides the earthquake vibration and shock classification used for seismic environment zone 4.
• IEC 60721-3-3:2019 - provides the matching classification framework for stationary use at weatherprotected locations.
• IEC 60068-3-3:2019 - provides supporting documentation and guidance for seismic test methods.
• ISO 9223:2012 - provides the corrosivity classification for atmospheres used in the chemical exposure discussion.

The foreword also notes Part 2 of the EN 300 019 series, which covers the specification of environmental tests.

What does the SIST EN 300 019-1-3 V3.1.1:2026 document contain?

SIST EN 300 019-1-3 V3.1.1:2026 contains class definitions, climatograms, environmental severity tables and seismic parameter data. Figures 1 to 3 show the climatic envelopes for Classes 3.10, 3.11 and 3.12, and Figure 4 with Tables 6 and 7 give the earthquake response spectrum data used for seismic interpretation.

The document also contains tabulated severities for biological conditions, chemically active substances, mechanically active substances and mechanical conditions. In practice, those tables are used to support design reviews, site/environment selection, equipment qualification and test planning rather than to prescribe a full test program by themselves.

Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)

EUROPEAN STANDARD
Environmental Engineering (EE);
Environmental conditions and environmental tests
for telecommunications equipment;
Part 1: Classification of environmental conditions;
Sub-part 3: Stationary use at weatherprotected locations

2 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)

Reference
REN/EE-017013
Keywords
environment, equipment practice, testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2026.
All rights reserved.
ETSI
3 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Environmental classes . 8
4.1 Class 3.10: Temperature-controlled enclosed locations having no humidity control . 8
4.2 Class 3.11: Enclosed locations having no temperature or humidity control . 9
4.3 Class 3.12: Locations having neither temperature nor humidity control . 10
5 Environmental conditions. 12
5.1 Climatic conditions. 12
5.2 Biological conditions . 12
5.3 Chemically active substances . 12
5.4 Mechanically active substances . 13
5.5 Mechanical conditions . 14
5.6 Earthquake conditions . 14
Annex A (informative): Bibliography . 16
Annex B (informative): Change history . 17
History . 18

ETSI
4 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
the oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE),
and is now submitted for the combined Public Enquiry and Vote phase of the ETSI.
The present document is part 1, sub-part 3 of a multi-part deliverable covering the classification of environmental
conditions and environmental tests for telecommunications equipment, as identified below:
Part 1: "Classification of environmental conditions": (see note 1)
Sub-part 0: "Introduction";
Sub-part 1: "Storage";
Sub-part 2: "Transportation";
Sub-part 3: "Stationary use at weatherprotected locations";
Sub-part 4: "Stationary use at non-weatherprotected locations";
Sub-part 5: "Ground vehicle installations";
Sub-part 6: "Ship environments";
Sub-part 7: "Portable and non-stationary use";
Sub-part 8: "Stationary use at underground locations";
Part 2: "Specification of environmental tests" (see note 2).
NOTE 1: Specifies different standardized environmental classes covering climatic and biological conditions,
chemically and mechanically active substances and mechanical conditions during storage, transportation
and in use. Sub-part 1-0 forms a general overview of part 1.
NOTE 2: Specifies the recommended test severities and test methods for the different environmental classes.
ETSI
5 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
6 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
1 Scope
The present document defines classes of environmental conditions and their severities to which telecommunication
equipment may be exposed. The severities specified are those which will have a low probability of being exceeded;
generally less than 1 % of the operating time in a year.
The present document applies to equipment mounted for stationary use including periods of erection work, down time,
maintenance and repair at weatherprotected locations defined in clause 5.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are necessary for the application of the present document.
[1] IEC 60721-2-6:2022: "Classification of environmental conditions - Part 2-6: Environmental
conditions appearing in nature - Earthquake vibration and shock".
[2] IEC 60721-3-3:2019: "Classification of environmental conditions - Part 3-3: Classification of
groups of environmental parameters and their severities - Stationary use at weatherprotected
locations".
[3] IEC 60068-3-3:2019: "Environmental testing - Part 3-3: Supporting documentation and guidance -
Seismic test methods for equipment".
[4] ISO 9223:2012: "Corrosion of metals and alloys — Corrosivity of atmospheres — Classification,
determination and estimation".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
Not applicable.
ETSI
7 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
absolute humidity: mass of water vapour in grams which is associated with one cubic metre of dry air in an air/water
vapour mixture
cooling system: system that controls or influences climate by decreasing the air temperature only
NOTE: This can decrease the absolute humidity.
data centre: all buildings, facilities, offices and rooms which contain enterprise servers, server communication
equipment, cooling equipment and power equipment, and provide some form of data service
NOTE: E.g. large scale mission critical facilities all the way down to small server rooms located in office
buildings.
heating system: system that controls or influences climate by increasing the air temperature only
NOTE: This can decrease the relative humidity.
relative humidity: ratio of the partial pressure of the water vapour in moist air at a given temperature, to the partial
pressure of the water vapour in saturated air at the same temperature
stationary use: use of equipment which is mounted firmly on a structure, or on mounting devices, or permanently
placed at a certain site
NOTE: It is not intended for portable use, but short periods of handling during erection works and for which
down time, maintenance and repair at the location are included.
weatherprotected location: location at which the equipment is protected from direct weather influences
EXAMPLE 1: Totally weatherprotected location (enclosed location):
direct weather influences are totally excluded.
EXAMPLE 2: Partly weatherprotected location (sheltered location):
direct weather influences are not completely excluded.
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
RS Response Spectrum
UV UltraViolet
ZPA Zero Period Acceleration
ETSI
8 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
4 Environmental classes
4.1 Class 3.10: Temperature-controlled enclosed locations
having no humidity control
Class 3.10 is a combination of classes 3K22/3Z2/3B1/3S6/3M11 in IEC 60721-3-3 [2], and C1 in ISO 9223 [4], see
Tables 1 to 6 in clause 5.
The climatogram is shown in Figure 1.
Seismic environment: zone 4 as defined in IEC 60721-2-6 [1]. Option zone 4 (modified Mercalli scale ≥ 9): if earthquake
conditions are specified by the customer, the conditions stated in clause 5.6 apply.
This class shall apply to a permanently temperature controlled enclosed location. Humidity usually not controlled. The
climatogram is shown in Figure 1. Exceptional conditions may apply in specific cases (e.g. external extreme
environmental conditions) and these exceptional conditions are shown in Figure 1 where they are described as 3.10E in
clause 5.1 but this is not a separate class.
NOTE: The exceptional conditions described as 3.10E in Figure 1 are not defined in IEC 60721-3-3 [2].
Heating or cooling are used to maintain the required conditions - especially where there is a significant difference
between the room environment and the external ambient. The climate-controlling systems could be periodically
switched on or off but extremely high or low temperatures are prevented.
This class shall apply to locations:
• where installed equipment may be exposed to solar radiation and to heat radiation. It may also be exposed to
movements of the surrounding air due to draughts in buildings. They are not subjected
...

ETSI EN 300 019-1-3 V3.1.1 (2026-05)

EUROPEAN STANDARD
Environmental Engineering (EE);
Environmental conditions and environmental tests
for telecommunications equipment;
Part 1: Classification of environmental conditions;
Sub-part 3: Stationary use at weatherprotected locations

2 ETSI EN 300 019-1-3 V3.1.1 (2026-05)

Reference
REN/EE-017013
Keywords
environment, equipment practice, testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2026.
All rights reserved.
ETSI
3 ETSI EN 300 019-1-3 V3.1.1 (2026-05)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Environmental classes . 8
4.1 Class 3.10: Temperature-controlled enclosed locations having no humidity control . 8
4.2 Class 3.11: Enclosed locations having no temperature or humidity control . 9
4.3 Class 3.12: Locations having neither temperature nor humidity control . 10
5 Environmental conditions. 12
5.1 Climatic conditions. 12
5.2 Biological conditions . 12
5.3 Chemically active substances . 12
5.4 Mechanically active substances . 14
5.5 Mechanical conditions . 14
5.6 Earthquake conditions . 14
Annex A (informative): Bibliography . 17
Annex B (informative): Change history . 18
History . 19

ETSI
4 ETSI EN 300 019-1-3 V3.1.1 (2026-05)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
the oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE).
The present document is part 1, sub-part 3 of a multi-part deliverable covering the classification of environmental
conditions and environmental tests for telecommunications equipment, as identified below:
Part 1: "Classification of environmental conditions"; (see note 1)
Sub-part 0: "Introduction";
Sub-part 1: "Storage";
Sub-part 2: "Transportation";
Sub-part 3: "Stationary use at weatherprotected locations";
Sub-part 4: "Stationary use at non-weatherprotected locations";
Sub-part 5: "Ground vehicle installations";
Sub-part 6: "Ship environments";
Sub-part 7: "Portable and non-stationary use";
Sub-part 8: "Stationary use at underground locations";
Part 2: "Specification of environmental tests" (see note 2).
NOTE 1: Specifies different standardized environmental classes covering climatic and biological conditions,
chemically and mechanically active substances and mechanical conditions during storage, transportation
and in use. Sub-part 1-0 forms a general overview of part 1.
NOTE 2: Specifies the recommended test severities and test methods for the different environmental classes.
ETSI
5 ETSI EN 300 019-1-3 V3.1.1 (2026-05)

National transposition dates
Date of adoption of this EN: 13 May 2026
Date of latest announcement of this EN (doa): 31 August 2026
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 28 February 2027
Date of withdrawal of any conflicting National Standard (dow): 28 February 2027

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
6 ETSI EN 300 019-1-3 V3.1.1 (2026-05)
1 Scope
The present document defines classes of environmental conditions and their severities to which telecommunication
equipment may be exposed. The severities specified are those which will have a low probability of being exceeded;
generally less than 1 % of the operating time in a year.
The present document applies to equipment mounted for stationary use including periods of erection work, down time,
maintenance and repair at weatherprotected locations defined in clause 5.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are necessary for the application of the present document.
[1] IEC 60721-2-6:2022: "Classification of environmental conditions - Part 2-6: Environmental
conditions appearing in nature - Earthquake vibration and shock".
[2] IEC 60721-3-3:2019: "Classification of environmental conditions - Part 3-3: Classification of
groups of environmental parameters and their severities - Stationary use at weatherprotected
locations".
[3] IEC 60068-3-3:2019: "Environmental testing - Part 3-3: Supporting documentation and guidance -
Seismic test methods for equipment".
[4] ISO 9223:2012: "Corrosion of metals and alloys — Corrosivity of atmospheres — Classification,
determination and estimation".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
Not applicable.
ETSI
7 ETSI EN 300 019-1-3 V3.1.1 (2026-05)
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
absolute humidity: mass of water vapour in grams which is associated with one cubic metre of dry air in an air/water
vapour mixture
cooling system: system that controls or influences climate by decreasing the air temperature only
NOTE: This can decrease the absolute humidity.
data centre: all buildings, facilities, offices and rooms which contain enterprise servers, server communication
equipment, cooling equipment and power equipment, and provide some form of data service
NOTE: E.g. large scale mission critical facilities all the way down to small server rooms located in office
buildings.
heating system: system that controls or influences climate by increasing the air temperature only
NOTE: This can decrease the relative humidity.
relative humidity: ratio of the partial pressure of the water vapour in moist air at a given temperature, to the partial
pressure of the water vapour in saturated air at the same temperature
stationary use: use of equipment which is mounted firmly on a structure, or on mounting devices, or permanently
placed at a certain site
NOTE: It is not intended for portable use, but short periods of handling during erection works and for which
down time, maintenance and repair at the location are included.
weatherprotected location: location at which the equipment is protected from direct weather influences
EXAMPLE 1: Totally weatherprotected location (enclosed location):
direct weather influences are totally excluded.
EXAMPLE 2: Partly weatherprotected location (sheltered location):
direct weather influences are not completely excluded.
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
RS Response Spectrum
UV UltraViolet
ZPA Zero Period Acceleration
ETSI
8 ETSI EN 300 019-1-3 V3.1.1 (2026-05)
4 Environmental classes
4.1 Class 3.10: Temperature-controlled enclosed locations
having no humidity control
Class 3.10 is a combination of classes 3K22/3Z2/3B1/3S6/3M11 in IEC 60721-3-3 [2], and C1 in ISO 9223 [4], see
Tables 1 to 6 in clause 5.
The climatogram is shown in Figure 1.
Seismic environment: zone 4 as defined in IEC 60721-2-6 [1]. Option zone 4 (modified Mercalli scale ≥ 9): if earthquake
conditions are specified by the customer, the conditions stated in clause 5.6 apply.
This class shall apply to a permanently temperature controlled enclosed location. Humidity usually not controlled. The
climatogram is shown in Figure 1. Exceptional conditions may apply in specific cases (e.g. external extreme
environmental conditions) and these exceptional conditions are shown in Figure 1 where they are described as 3.10E in
clause 5.1 but this is not a separate class.
NOTE: The exceptional conditions described as 3.10E in Figure 1 are not defined in IEC 60721-3-3 [2].
Heating or cooling are used to maintain the required conditions - especially where there is a significant difference
between the room environment and the external ambient. The climate-controlling systems could be periodically
switched on or off but extremely high or low temperatures are prevented.
This class shall apply to locations:
• where installed equipment may be exposed to solar radiation and to heat radiation. It may also be exposed to
movements of the surrounding air due to draughts in buildings. They are not subjected to condensed water,
precipitation, water from sources other than rain or icing;
• without particular risk
...

SLOVENSKI STANDARD
01-oktober-2026
Okoljski inženiring (EE) - Okoljski pogoji in preskusi vplivov okolja na
telekomunikacijsko opremo - 1. del: Klasifikacija okoljskih pogojev - 3. poddel:
Fiksna uporaba na lokacijah, zaščitenih pred vremenskimi vplivi
Environmental Engineering (EE) - Environmental conditions and environmental tests for
telecommunications equipment - Part 1: Classification of environmental conditions - Sub-
part 3: Stationary use at weatherprotected locations
Ta slovenski standard je istoveten z: ETSI EN 300 019-1-3 V3.1.1 (2026-05)
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
33.050.01 Telekomunikacijska Telecommunication terminal
terminalska oprema na equipment in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

ETSI EN 300 019-1-3 V3.1.1 (2026-05)

EUROPEAN STANDARD
Environmental Engineering (EE);
Environmental conditions and environmental tests
for telecommunications equipment;
Part 1: Classification of environmental conditions;
Sub-part 3: Stationary use at weatherprotected locations

2 ETSI EN 300 019-1-3 V3.1.1 (2026-05)

Reference
REN/EE-017013
Keywords
environment, equipment practice, testing
ETSI
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ETSI
3 ETSI EN 300 019-1-3 V3.1.1 (2026-05)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Environmental classes . 8
4.1 Class 3.10: Temperature-controlled enclosed locations having no humidity control . 8
4.2 Class 3.11: Enclosed locations having no temperature or humidity control . 9
4.3 Class 3.12: Locations having neither temperature nor humidity control . 10
5 Environmental conditions. 12
5.1 Climatic conditions. 12
5.2 Biological conditions . 12
5.3 Chemically active substances . 12
5.4 Mechanically active substances . 14
5.5 Mechanical conditions . 14
5.6 Earthquake conditions . 14
Annex A (informative): Bibliography . 17
Annex B (informative): Change history . 18
History . 19

ETSI
4 ETSI EN 300 019-1-3 V3.1.1 (2026-05)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
the oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE).
The present document is part 1, sub-part 3 of a multi-part deliverable covering the classification of environmental
conditions and environmental tests for telecommunications equipment, as identified below:
Part 1: "Classification of environmental conditions"; (see note 1)
Sub-part 0: "Introduction";
Sub-part 1: "Storage";
Sub-part 2: "Transportation";
Sub-part 3: "Stationary use at weatherprotected locations";
Sub-part 4: "Stationary use at non-weatherprotected locations";
Sub-part 5: "Ground vehicle installations";
Sub-part 6: "Ship environments";
Sub-part 7: "Portable and non-stationary use";
Sub-part 8: "Stationary use at underground locations";
Part 2: "Specification of environmental tests" (see note 2).
NOTE 1: Specifies different standardized environmental classes covering climatic and biological conditions,
chemically and mechanically active substances and mechanical conditions during storage, transportation
and in use. Sub-part 1-0 forms a general overview of part 1.
NOTE 2: Specifies the recommended test severities and test methods for the different environmental classes.
ETSI
5 ETSI EN 300 019-1-3 V3.1.1 (2026-05)

National transposition dates
Date of adoption of this EN: 13 May 2026
Date of latest announcement of this EN (doa): 31 August 2026
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 28 February 2027
Date of withdrawal of any conflicting National Standard (dow): 28 February 2027

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
6 ETSI EN 300 019-1-3 V3.1.1 (2026-05)
1 Scope
The present document defines classes of environmental conditions and their severities to which telecommunication
equipment may be exposed. The severities specified are those which will have a low probability of being exceeded;
generally less than 1 % of the operating time in a year.
The present document applies to equipment mounted for stationary use including periods of erection work, down time,
maintenance and repair at weatherprotected locations defined in clause 5.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are necessary for the application of the present document.
[1] IEC 60721-2-6:2022: "Classification of environmental conditions - Part 2-6: Environmental
conditions appearing in nature - Earthquake vibration and shock".
[2] IEC 60721-3-3:2019: "Classification of environmental conditions - Part 3-3: Classification of
groups of environmental parameters and their severities - Stationary use at weatherprotected
locations".
[3] IEC 60068-3-3:2019: "Environmental testing - Part 3-3: Supporting documentation and guidance -
Seismic test methods for equipment".
[4] ISO 9223:2012: "Corrosion of metals and alloys — Corrosivity of atmospheres — Classification,
determination and estimation".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
Not applicable.
ETSI
7 ETSI EN 300 019-1-3 V3.1.1 (2026-05)
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
absolute humidity: mass of water vapour in grams which is associated with one cubic metre of dry air in an air/water
vapour mixture
cooling system: system that controls or influences climate by decreasing the air temperature only
NOTE: This can decrease the absolute humidity.
data centre: all buildings, facilities, offices and rooms which contain enterprise servers, server communication
equipment, cooling equipment and power equipment, and provide some form of data service
NOTE: E.g. large scale mission critical facilities all the way down to small server rooms located in office
buildings.
heating system: system that controls or influences climate by increasing the air temperature only
NOTE: This can decrease the relative humidity.
relative humidity: ratio of the partial pressure of the water vapour in moist air at a given temperature, to the partial
pressure of the water vapour in saturated air at the same temperature
stationary use: use of equipment which is mounted firmly on a structure, or on mounting devices, or permanently
placed at a certain site
NOTE: It is not intended for portable use, but short periods of handling during erection works and for which
down time, maintenance and repair at the location are included.
weatherprotected location: location at which the equipment is protected from direct weather influences
EXAMPLE 1: Totally weatherprotected location (enclosed location):
direct weather influences are totally excluded.
EXAMPLE 2: Partly weatherprotected location (sheltered location):
direct weather influences are not completely excluded.
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
RS Response Spectrum
UV UltraViolet
ZPA Zero Period Acceleration
ETSI
8 ETSI EN 300 019-1-3 V3.1.1 (2026-05)
4 Environmental classes
4.1 Class 3.10: Temperature-controlled enclosed locations
having no humidity control
Class 3.10 is a combination of classes 3K22/3Z2/3B1/3S6/3M11 in IEC 60721-3-3 [2], and C1 in ISO 9223 [4], see
Tables 1 to 6 in clause 5.
The climatogram is shown in Figure 1.
Seismic environment: zone 4 as defined in IEC 60721-2-6 [1]. Option zone 4 (modified Mercalli scale ≥ 9): if earthquake
conditions are specified by the customer, the conditions stated in clause 5.6 apply.
This class shall apply to a permanently temperature controlled enclosed location. Humidity usually not controlled. The
climatogram is shown in Figure 1. Exceptional conditions may apply in specific cases (e.g. external extreme
environmental conditions) and these exceptional conditions are shown in Figure 1 where they are described as 3.10E in
clause 5.1 but this is not a separate class.
NOTE: The exceptional conditions described as 3.10E in Figure 1 are not defined in IEC 60721-3-3 [2].
Heating or cooling are used to maintain the required conditions - especially where there is a significant difference
between the room environment and the external ambien
...