SIST EN ISO 21805:2023/oprA1:2025
(Amendment)Guidance and recommendations on design, selection and installation of vents to safeguard the structural integrity of enclosures protected by gaseous fire-extinguishing systems - Amendment 1 (ISO 21805:2023/DAM 1:2025)
Guidance and recommendations on design, selection and installation of vents to safeguard the structural integrity of enclosures protected by gaseous fire-extinguishing systems - Amendment 1 (ISO 21805:2023/DAM 1:2025)
Anleitung für die Konstruktion, Auswahl und Installation von Druckentlastungsöffnungen zur Sicherstellung der strukturellen Integrität von Gehäusen, die durch ortsfeste Gaslöschanlagen geschützt sind - Änderung 1 (ISO 21805:2023/DAM 1:2025)
Lignes directrices et recommandations relatives à la conception, à la sélection et à l'installation d'évents pour préserver l'intégrité structurelle des enceintes protégées par des systèmes d'extinction d'incendie à gaz - Amendement 1 (ISO 21805:2023/DAM 1:2025)
Navodilo in priporočila za projektiranje, izbiro in vgradnjo prezračevalnih naprav za zagotavljanje strukturne integritete namestitvenih prostorov, zaščitenih s sistemi za gašenje s plinom - Dopolnilo A1 (ISO 21805:2023/DAM 1:2025)
General Information
Relations
Overview
EN ISO 21805:2023/prA1 (Amendment 1 to ISO 21805:2023) provides guidance and recommendations on the design, selection and installation of vents to safeguard the structural integrity of enclosures protected by gaseous fire‑extinguishing systems. Issued under CEN/ISO collaboration, this amendment (ISO 21805:2023/DAM 1:2025) clarifies scope references and refines the normative linkages to related ISO standards. The document is circulated as a draft amendment for comment and approval (voting period June–September 2025) and may be subject to change.
Key topics and requirements
- Guidance on the purpose and function of pressure relief vents and other ventilation measures for enclosures using gaseous fire‑extinguishing systems.
- Recommendations for vent design, selection and installation so that rapid gas discharge or pressure transients do not compromise enclosure structure.
- Emphasis on preserving structural integrity while maintaining the effectiveness of gas‑based suppression agents.
- Amendment-specific change to scope references:
- Replace "ISO 6183:2022, 6.4.1 and 7.4.1" with "ISO 6183:2022, 5.2.1 g), 6.4.1 and d"
- Replace "ISO 14520-1:2023, 5.2.1 h) and 5.3 h)" with "ISO 14520-1:2023, 5.3 h) and 7.4"
- Notes that the draft may require attention to potential patent rights and national regulation relevance.
Practical applications
- Protecting equipment‑filled enclosures where gaseous suppression is used, such as:
- Data centers, server rooms and telecommunications cabinets
- Electrical switchrooms and plant rooms
- Archives, museums and sensitive storage areas
- Use cases include specifying vent area, location and activation characteristics to avoid structural damage during discharge events while enabling fire suppression performance.
Who should use this standard
- Fire protection engineers and system designers specifying vents and pressure relief in gas suppression installations
- HVAC and ventilation engineers coordinating enclosure airflow and relief strategies
- Safety managers, facility operators and installers responsible for compliance and operational safety
- Certification bodies and regulatory authorities assessing fixed gaseous fire‑extinguishing systems
Related standards
- ISO 21805:2023 (base standard) / EN ISO 21805
- ISO 6183:2022 (referenced clauses updated by the amendment)
- ISO 14520‑1:2023 (referenced clauses updated by the amendment)
Keywords: EN ISO 21805:2023/prA1, vents, gaseous fire‑extinguishing systems, structural integrity, vent design, vent installation, fire protection standards.
Frequently Asked Questions
SIST EN ISO 21805:2023/oprA1:2025 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Guidance and recommendations on design, selection and installation of vents to safeguard the structural integrity of enclosures protected by gaseous fire-extinguishing systems - Amendment 1 (ISO 21805:2023/DAM 1:2025)". This standard covers: Guidance and recommendations on design, selection and installation of vents to safeguard the structural integrity of enclosures protected by gaseous fire-extinguishing systems - Amendment 1 (ISO 21805:2023/DAM 1:2025)
Guidance and recommendations on design, selection and installation of vents to safeguard the structural integrity of enclosures protected by gaseous fire-extinguishing systems - Amendment 1 (ISO 21805:2023/DAM 1:2025)
SIST EN ISO 21805:2023/oprA1:2025 is classified under the following ICS (International Classification for Standards) categories: 13.220.10 - Fire-fighting; 91.140.30 - Ventilation and air-conditioning systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 21805:2023/oprA1:2025 has the following relationships with other standards: It is inter standard links to SIST EN ISO 21805:2023. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2025
Navodilo in priporočila za projektiranje, izbiro in vgradnjo prezračevalnih naprav
za zagotavljanje strukturne integritete namestitvenih prostorov, zaščitenih s
sistemi za gašenje s plinom - Dopolnilo A1 (ISO 21805:2023/DAM 1:2025)
Guidance and recommendations on design, selection and installation of vents to
safeguard the structural integrity of enclosures protected by gaseous fire-extinguishing
systems - Amendment 1 (ISO 21805:2023/DAM 1:2025)
Anleitung für die Konstruktion, Auswahl und Installation von Druckentlastungsöffnungen
zur Sicherstellung der strukturellen Integrität von Gehäusen, die durch ortsfeste
Gaslöschanlagen geschützt sind - Änderung 1 (ISO 21805:2023/DAM 1:2025)
Lignes directrices et recommandations relatives à la conception, à la sélection et à
l'installation d'évents pour préserver l'intégrité structurelle des enceintes protégées par
des systèmes d'extinction d'incendie à gaz - Amendement 1 (ISO 21805:2023/DAM
1:2025)
Ta slovenski standard je istoveten z: EN ISO 21805:2023/prA1
ICS:
13.220.10 Gašenje požara Fire-fighting
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
Amendment
ISO 21805:2023/
DAM 1
ISO/TC 21/SC 8
Guidance and recommendations on
Secretariat: SA
design, selection and installation
of vents to safeguard the structural
Voting begins on:
2025-06-18
integrity of enclosures protected by
Voting terminates on:
gaseous fire-extinguishing systems
2025-09-10
AMENDMENT 1
Lignes directrices et recommandations relatives à la conception,
à la sélection et à l'installation d'évents pour préserver l'intégrité
structurelle des enceintes protégées par des systèmes d'extinction
d'incendie à gaz
AMENDEMENT 1
ICS: 91.140.30; 13.220.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO 21805:2023/DAM 1:2025(en)
DRAFT
ISO 21805:2023/DAM 1:2025(en)
Amendment
ISO 21805:2023/
DAM 1
ISO/TC 21/SC 8
Guidance and recommendations on
Secretariat: SA
design, selection and installation
of vents to safeguard the structural
Voting begins on:
integrity of enclosures protected by
Voting terminates on:
gaseous fire-extinguishing systems
AMENDMENT 1
Lignes directrices et recommandations relatives à la conception,
à la sélection et à l'installation d'évents pour préserver l'intégrité
structurelle des enceintes protégées par des systèmes d'extinction
d'incendie à gaz
AMENDEMENT 1
ICS: 91.140.30; 13.220.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by
...
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