SIST EN 18126:2026
(Main)Outdoor gas appliances - Additional provisions for 2nd family gas use
Outdoor gas appliances - Additional provisions for 2nd family gas use
This document applies to gas appliances intended for outdoor use capable of working with gases of the second family or second and third family.
This document does not apply to appliances intended for commercial purposes.
The scope of this document is the same as the scope of the product standards developed by the European Technical Committee CEN/TC 181 covering the same type of appliance but limited to the use of liquefied petroleum gases, hereinafter referred to as ‘the product standard’.
This standard is applicable in addition to the product standards developed by CEN/TC 181 covering LPG dedicated appliances. For example, the product standards are:
- for an independent cooktop: EN 484;
- for multi-purpose boiling burners: EN 497;
- for a barbecue or griddle: EN 498;
- for a patio heater: EN 14543;
- flueless non-domestic space heaters: EN 461.
This document does not apply to appliances under the scope of EN 449.
This document does not apply to appliances fitted with a gas pressure governor.
This document specifies the manufacturing, and marking requirements and establish the testing method of appliances prior to their placing on the market and during further assessments.
This document does not apply for changing the appliance category of an appliance already put on the market.
This document specifies the modifications of the appliances allowed to change the type of gas to be used depending of its gas category.
This document does not apply to appliances burning liquefied petroleum gases at the vapour pressure within the gas cartridge or gas cylinder.
Gasgeräte zur Verwendung im Freien - Zusätzliche Anforderungen für die zweite Gasfamilie
Dieses Dokument ist auf Gasgeräte anwendbar, die für die Verwendung im Freien vorgesehen und für den Betrieb mit Gasen der zweiten oder der zweiten und dritten Gasfamilie geeignet sind.
Dieses Dokument ist nicht auf Geräte anwendbar, die für gewerbliche Zwecke bestimmt sind.
Der Anwendungsbereich dieses Dokuments ist der gleiche wie der Anwendungsbereich der Produktnormen vom CEN/TC 181, welche die gleiche Geräteart abdecken, aber auf die Verwendung von Flüssiggas beschränkt sind; sie werden im Folgenden als "die Produktnormen" bezeichnet.
Diese Norm gilt zusätzlich zu den vom CEN/TC 181 erarbeiteten Produktnormen, welche mit Flüssiggas betriebene Geräte abdecken. Es gibt beispielsweise Produktnormen:
- für ein eigenständiges Kochgerät: EN 484;
- für Mehrzweckkochgeräte: EN 497;
- für ein Grillgerät oder einen Kontaktgrill: EN 498;
- für einen Terrassenheizstrahler: EN 14543;
- für abzuglose Gewerberaumheizgeräte: EN 461;
- usw.
Dieses Dokument ist nicht auf Geräte anwendbar, die in den Anwendungsbereich von EN 449 fallen.
Dieses Dokument ist nicht auf Geräte anwendbar, die mit einem Gasdruckregler ausgestattet sind.
Dieses Dokument legt die Anforderungen an die Herstellung und Kennzeichnung von Geräten fest und gibt das Prüfverfahren an, das vor der Markteinführung und im Rahmen weiterer Beurteilungen angewendet wird.
Dieses Dokument ist nicht anwendbar, wenn die Gerätekategorie eines Gerätes geändert wird, das bereits auf den Markt gebracht wurde.
Dieses Dokument legt die Änderungen für die Geräte fest, für die eine Änderung der zu verwendenden Gasart in Abhängigkeit von ihrer Gaskategorie erlaubt ist.
Dieses Dokument ist nicht auf Geräte anwendbar, die Flüssiggas bei Dampfdruck in der Gaskartusche oder in der Gasflasche verbrennen.
Appareils à gas d'extérieur - Dispositions complémentaires pour l'utilisation des gaz de 2ème famille
Le présent document s’applique aux appareils destinés à un usage extérieur pouvant fonctionner avec les gaz de la deuxième famille ou de la deuxième et de la troisième famille.
Il ne s'applique pas aux appareils destinés à un usage commercial.
Le domaine d’application du présent document est le même que celui des normes de produits élaborées par le comité technique européen CEN/TC 181 couvrant le même type d’appareil, mais limitées à l’utilisation de gaz de pétrole liquéfiés, ci-après appelées la « norme de produits ».
La présente norme s'applique en complément des normes de produits élaborées par le CEN/TC 181 couvrant les appareils à gaz de pétrole liquéfié (GPL). Voici quelques exemples de normes de produits :
- pour une table de cuisson indépendante : EN 484 ;
- pour les brûleurs à usages multiples : EN 497 ;
- pour un barbecue ou une plancha : EN 498 ;
- pour un parasol chauffant : EN 14543 ;
- appareils de chauffage non domestiques non raccordés : EN 461 ;
- etc.
Le présent document ne s’applique pas aux appareils relevant du domaine d'application de l’EN 449.
Le présent document ne s'applique pas aux appareils équipés d'un régulateur de pression de gaz.
Le présent document spécifie les exigences relatives à la fabrication et au marquage, et établit la méthode d’essai des appareils avant leur mise sur le marché et pendant les évaluations ultérieures.
Le présent document ne s’applique pas au changement de catégorie d’un appareil déjà mis sur le marché.
Le présent document spécifie les modifications des appareils autorisés à modifier le type de gaz à utiliser en fonction de sa catégorie de gaz.
Le présent document ne s’applique pas aux appareils qui brûlent des gaz de pétrole liquéfiés à la pression de vapeur à l’intérieur d’une cartouche de gaz ou d’une bouteille de gaz.
Plinske naprave za zunanjo uporabo - Dodatne zahteve za uporabo plinov 2. družine
Ta dokument se nanaša na plinske naprave, namenjene za zunanjo uporabo, ki lahko delujejo s plini druge družine ali druge in tretje družine.
Ta dokument se ne nanaša na naprave, namenjene za komercialne namene.
Področje uporabe tega dokumenta je enako kot področje uporabe standardov za proizvode, ki jih razvija Evropski tehnični odbor CEN/TC 181 in pokrivajo isti tip naprav, vendar omejeno na uporabo utekočinjenih naftnih plinov, v nadaljevanju imenovanih 'standard za proizvode'.
Ta standard se uporablja poleg standardov za proizvode, ki jih razvija CEN/TC 181 in pokrivajo naprave, namenjene za uporabo z utekočinjenimi naftnimi plini. Na primer, standardi za proizvode so:
- za samostojno kuhalno ploščo: EN 484;
- za večnamenske kuhalne gorilnike: EN 497;
- za žar ali ploščo za pečenje: EN 498;
- za grelnik na terasi: EN 14543;
- za neprezračevane nedomače grelnike prostorov: EN 461.
Ta dokument se ne nanaša na naprave, ki so v okviru standarda EN 449.
Ta dokument se ne nanaša na naprave, opremljene z regulatorjem plinskega tlaka.
Ta dokument določa zahteve za proizvodnjo in označevanje ter vzpostavlja metodo preskušanja naprav pred njihovim dajanjem na trg in med nadaljnjimi ocenami.
Ta dokument se ne uporablja za spremembo kategorije naprave, ki je že bila dana na trg.
Ta dokument določa spremembe naprav, ki so dovoljene za spremembo vrste plina, ki se uporablja, odvisno od njegove plinske kategorije.
Ta dokument se ne nanaša na naprave, ki gorijo utekočinjene naftne pline pri parnem tlaku v plinski kartuši ali plinski jeklenki.
General Information
- Status
- Published
- Public Enquiry End Date
- 01-Apr-2025
- Publication Date
- 13-Apr-2026
- Technical Committee
- PLN - Gas appliances for domestic use
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 11-Feb-2026
- Due Date
- 18-Apr-2026
- Completion Date
- 14-Apr-2026
- Mandate
- M/xxx - EUDI Wallet
Overview
kSIST FprEN 18126:2025 is a European standard developed by CEN/TC 181 that specifies additional provisions for outdoor gas appliances designed to operate with gases of the second family or both the second and third gas families. Primarily targeting household appliances for outdoor use, this standard complements existing product standards focused on liquefied petroleum gases (LPG). Its aim is to ensure safety, performance, and interoperability of gas appliances such as barbecues, cooktops, patio heaters, and multi-purpose burners when used with these gas types, excluding commercial applications and certain categories like appliances with gas pressure governors.
This standard covers essential aspects including construction, manufacturing, marking, and testing prior to market placement and during ongoing assessments. It also defines permissible modifications to appliances to allow switching between different gas types within specified families, enhancing appliance flexibility and regional compatibility.
Key Topics
Scope & Applicability
- Applies to household outdoor gas appliances working with second or second and third family gases.
- Inapplicable to commercial appliances, appliances under EN 449, appliances with gas pressure governors, or those burning LPG at vapor pressure within gas cylinders.
Gas Categories & Classification
- Defines appliance categories aligned with EN 437:2021 for gases and testing protocols.
- Covers gas categories such as 2E+, 2H, 2EK, and combined categories like 2E+3+, enabling a broad range of gas compatibility.
Constructional Requirements
- Appliances must meet construction characteristics of relevant product standards plus specific provisions for gas type adaptability.
- Restrictions on adjustments for categories I and III gas appliances; limited modifications permitted only for specific categories (e.g., injector changes, air intake adjustment).
- Gas connections must follow international thread standards (EN ISO 228-1, EN 10226-1/2) and support interchangeable connection methods.
Performance & Testing
- Nominal heat input remains consistent across gas family types.
- Testing uses reference and limit gases per EN 437 to validate safety, ignition, flame stability, and combustion quality.
- CO emissions and combustion products tested to meet safety thresholds.
Marking & Instructions
- Appliance labeling must clearly indicate compatible gas types and pressure categories.
- Installation instructions must provide detailed guidelines on gas compatibility, conversion procedures, and connection requirements.
- Conversion operations or installation changes require qualified professionals to ensure safety and compliance.
Applications
kSIST FprEN 18126:2025 mainly applies to a variety of outdoor gas appliances used in residential and leisure settings, including but not limited to:
- Independent Cooktops (per EN 484)
- Multi-purpose Boiling Burners (per EN 497)
- Barbecues and Griddles (per EN 498)
- Patio Heaters (per EN 14543)
- Flueless Non-domestic Space Heaters (per EN 461)
By defining protocols for safe multi-gas operation, this standard facilitates the broader use of natural gas and other second family gases in outdoor appliances, supporting energy diversification and consumer convenience across European markets. It ensures that appliances maintain safety and performance regardless of the gas type used, fostering reliability and regulatory compliance.
Related Standards
This standard works in conjunction with several important EN standards, including:
- EN 437:2021 – Test gases, test pressures, and appliance categories
- EN 484 – Independent cooktops for LPG
- EN 497 – Multi-purpose boiling burners for LPG
- EN 498 – Barbecues and griddles for LPG
- EN 14543 – Patio heaters for LPG
- EN 461 – Flueless non-domestic space heaters for LPG
- EN 449:2002+A1:2007 – Excluded appliances scope
- EN 203-1:2021+A1:2023 – General safety requirements for gas heated catering equipment
- EN ISO 228-1:2003, EN 10226-1:2004, EN 10226-2:2005 – Standards for pipe threads ensuring pressure-tight joints
By adhering to kSIST FprEN 18126:2025 alongside these referenced standards, manufacturers and testing bodies can guarantee enhanced safety, adaptability, and market readiness of outdoor gas appliances across various European countries.
Keywords: outdoor gas appliances, second family gases, CEN/TC 181, LPG, appliance standards, EN 18126, gas appliance safety, outdoor cooktops, patio heaters, gas conversion, EN 437, gas marking and testing, European gas standards.
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Frequently Asked Questions
SIST EN 18126:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Outdoor gas appliances - Additional provisions for 2nd family gas use". This standard covers: This document applies to gas appliances intended for outdoor use capable of working with gases of the second family or second and third family. This document does not apply to appliances intended for commercial purposes. The scope of this document is the same as the scope of the product standards developed by the European Technical Committee CEN/TC 181 covering the same type of appliance but limited to the use of liquefied petroleum gases, hereinafter referred to as ‘the product standard’. This standard is applicable in addition to the product standards developed by CEN/TC 181 covering LPG dedicated appliances. For example, the product standards are: - for an independent cooktop: EN 484; - for multi-purpose boiling burners: EN 497; - for a barbecue or griddle: EN 498; - for a patio heater: EN 14543; - flueless non-domestic space heaters: EN 461. This document does not apply to appliances under the scope of EN 449. This document does not apply to appliances fitted with a gas pressure governor. This document specifies the manufacturing, and marking requirements and establish the testing method of appliances prior to their placing on the market and during further assessments. This document does not apply for changing the appliance category of an appliance already put on the market. This document specifies the modifications of the appliances allowed to change the type of gas to be used depending of its gas category. This document does not apply to appliances burning liquefied petroleum gases at the vapour pressure within the gas cartridge or gas cylinder.
This document applies to gas appliances intended for outdoor use capable of working with gases of the second family or second and third family. This document does not apply to appliances intended for commercial purposes. The scope of this document is the same as the scope of the product standards developed by the European Technical Committee CEN/TC 181 covering the same type of appliance but limited to the use of liquefied petroleum gases, hereinafter referred to as ‘the product standard’. This standard is applicable in addition to the product standards developed by CEN/TC 181 covering LPG dedicated appliances. For example, the product standards are: - for an independent cooktop: EN 484; - for multi-purpose boiling burners: EN 497; - for a barbecue or griddle: EN 498; - for a patio heater: EN 14543; - flueless non-domestic space heaters: EN 461. This document does not apply to appliances under the scope of EN 449. This document does not apply to appliances fitted with a gas pressure governor. This document specifies the manufacturing, and marking requirements and establish the testing method of appliances prior to their placing on the market and during further assessments. This document does not apply for changing the appliance category of an appliance already put on the market. This document specifies the modifications of the appliances allowed to change the type of gas to be used depending of its gas category. This document does not apply to appliances burning liquefied petroleum gases at the vapour pressure within the gas cartridge or gas cylinder.
SIST EN 18126:2026 is classified under the following ICS (International Classification for Standards) categories: 27.060.20 - Gas fuel burners. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 18126:2026 is associated with the following European legislation: EU Directives/Regulations: 2016/426; Standardization Mandates: M/595, M/xxx. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 18126:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2026
Plinske naprave za zunanjo uporabo - Dodatne zahteve za uporabo plinov 2.
družine
Outdoor gas appliances - Additional provisions for 2nd family gas use
Gasgeräte zur Verwendung im Freien - Zusätzliche Anforderungen für die zweite
Gasfamilie
Appareils à gas d'extérieur - Dispositions complémentaires pour l'utilisation des gaz de
2ème famille
Ta slovenski standard je istoveten z: EN 18126:2026
ICS:
27.060.20 Plinski gorilniki Gas fuel burners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 18126
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2026
EUROPÄISCHE NORM
ICS 27.060.20
English Version
Outdoor gas appliances - Additional provisions for 2nd
family gas use
Appareils à gaz d'extérieur - Dispositions Gasgeräte zur Verwendung im Freien - Zusätzliche
complémentaires pour l'utilisation des gaz de 2ème Anforderungen für die zweite Gasfamilie
famille
This European Standard was approved by CEN on 9 February 2026.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 18126:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Classification of gases and appliance categories . 6
5 Constructional characteristics . 6
5.1 General . 6
5.2 Conversion to different gases . 6
5.2.1 General . 6
5.2.2 Categories I I I , I or I . 6
2E+, 2H, 2E 2EK, 2ELL
5.2.3 Categories II , II , II , II , II , II , II , II , II II or
2E+3+ 2E+3P 2E+3B/P 2H3+ 2H3P 2H3B/P 2E3+ 2E3P 2E3B/P, 2EK3P
II , II , II or II . 7
2EK3B/P 2ELL3B/P 2ELL3P 2E3P
5.3 Gas connections . 7
6 Performance characteristics . 7
7 Test methods . 7
7.1 General . 7
7.2 Test gases and test pressures . 7
7.2.1 Test gases . 7
7.2.2 Test pressures . 8
7.3 Ignition, cross-lighting and flame stability . 8
7.4 Combustion . 8
8 Marking . 8
9 Instructions . 9
9.1 General . 9
9.2 Instructions for installation . 9
9.3 Instructions for conversion of appliances of double categories . 9
Annex A (normative) National situations .10
A.1 General .10
A.2 Categories marketed in the various countries and corresponding pressures .10
A.3 Types of connection used in various countries for second family gases .10
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/426 aimed to be covered .12
Bibliography .15
European foreword
This document (EN 18126:2026) has been prepared by Technical Committee CEN/TC 181 “Appliances
and leisure vehicle installations using liquefied petroleum gas and appliances using natural gas for
outdoor use”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2026, and conflicting national standards shall
be withdrawn at the latest by September 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
Outdoor heating and cooking appliances (barbecues, heating umbrellas.) are generally designed,
manufactured and certified for exclusive operation with liquefied petroleum gases. The state of the art of
gas distribution and connection makes it possible to develop outdoor uses of appliances supplied with
natural gas. This document has been developed to complete the CEN/TC 181 standards for
manufacturing, testing and marking appliances covered by CEN/TC 181 for outdoor operating with
second-family gases.
1 Scope
This document applies to gas appliances intended for outdoor use capable of working with gases of the
second family or second and third family.
This document does not apply to appliances intended for commercial purposes.
The scope of this document is the same as the scope of the product standards developed by the European
Technical Committee CEN/TC 181 covering the same type of appliance but limited to the use of liquefied
petroleum gases, hereinafter referred to as ‘the product standard’.
This standard is applicable in addition to the product standards developed by CEN/TC 181 covering LPG
dedicated appliances. For example, the product standards are:
— for an independent cooktop: EN 484;
— for multi-purpose boiling burners: EN 497;
— for a barbecue or griddle: EN 498;
— for a patio heater: EN 14543;
— flueless non-domestic space heaters: EN 461.
This document does not apply to appliances under the scope of EN 449.
This document does not apply to appliances fitted with a gas pressure governor.
This document specifies the manufacturing, and marking requirements and establish the testing method
of appliances prior to their placing on the market and during further assessments.
This document does not apply for changing the appliance category of an appliance already put on the
market.
This document specifies the modifications of the appliances allowed to change the type of gas to be used
depending of its gas category.
This document does not apply to appliances burning liquefied petroleum gases at the vapour pressure
within the gas cartridge or gas cylinder.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 437:2021, Test gases — Test pressures — Appliance categories
EN 10226-1:2004, Pipe threads where pressure tight joints are made on the threads — Part 1: Taper
external threads and parallel internal threads — Dimensions, tolerances and designation
EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads — Part 2: Taper
external threads and taper internal threads — Dimensions, tolerances and designation
EN ISO 228-1:2003, Pipe threads where pressure-tight joints are not made on the threads — Part 1:
Dimensions, tolerances and designation (ISO 228-1:2000)
3 Terms and definitions
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
For the purposes of this document, the terms and definitions that apply are indicated in each product
standard with the following addition:
3.1
conversion
operation carried out on an appliance at the time of a change of gas by a competent person
[SOURCE: EN 30-1-1:2021+A1:2023, 3.1.1 modified – the wording “ by a professional” has been deleted]
4 Classification of gases and appliance categories
Gases are classified into families and groups in accordance with EN 437:2021.
Appliances are classified into categories in accordance with EN 437:2021.
NOTE Guidance for extension to other categories is specified in EN 437:2021, Annex C.
5 Constructional characteristics
5.1 General
The requirements of the relevant product standard apply, with the following addition.
Appliances are designed for one of the following categories:
I2E+, I2H,, I2E, I2EK, I2ELL;
II , II , II ;
2E+3+ 2E+3P 2E+3B
...
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