SIST EN 509:2025/oprA1:2025

Decorative fuel-effect gas appliances

This document specifies the requirements and test methods for the construction, safety, and marking of decorative fuel effect gas appliances not exceeding a nominal heat input of 20 kW (based on the net calorific value), thereafter referred to as appliances.
This document is applicable to appliances that are designed to simulate a solid fuel fire and incorporate a natural draught burner with or without an ignition burner, that uses one or more combustible gases of the three gas families at the pressures stated in EN 437:2021. The appliances are for decorative purposes only and are not heating appliances.
This document is applicable to type BAS, as described in 4.2, decorative fuel effect gas appliances that are designed to be installed within a non-combustible builder's opening or a non-combustible fireplace recess.
This document specifies special national conditions in Annex C for appliances of category I2E+, marketed in Belgium.
This document specifies special A-deviations in Annex D for appliances in Switzerland which require additional requirements for subclauses 6.6 and 6.7. This document includes additional requirements for Type BBS appliances which are specified in Annex F.
In addition, this document is applicable to decorative fuel-effect gas appliances that are designed to be installed under a non-combustible canopy which is independent or integral with a flue box, for which additional requirements are specified in Annex A.
The use of toxic gases is not covered.
This document is not applicable to:
-   catalytic combustion appliances;
-   appliances in which the supply of combustion air and/or the evacuation of products of combustion is achieved by mechanical means.
NOTE   Requirements concerning the rational use of energy have not been included in this document because the appliances are for decorative purposes.

Dekorative Gasgeräte mit Brennstoffeffekt

Appareils à effet décoratif de combustion utilisant les combustibles gazeux

Plinski aparati z dekorativnim plamenom - Dopolnilo A1

General Information

• Status: Not Published
• Public Enquiry End Date: 02-Oct-2025
• ICS: 97.100.20 - Gas heaters
• Technical Committee: PLN - Gas appliances for domestic use
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 13-Aug-2025
• Due Date: 31-Dec-2025
• Completion Date: 15-Oct-2025
• Directive: 2016/426 - REGULATION (EU) 2016/426 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 9 March 2016 on appliances burning gaseous fuels and repealing Directive 2009/142/EC
• Mandate: M/369 - Amendment to: Mandate to CEN/CENELEC concerning the execution of standardisation work for harmonized standards on Space heating appliance and energy capturing appliances
• Mandate: M/595 - [C(2023)4789] - Commission Implementing Decision of 20.7.2023 on a standardisation reques as regards gas appliances and fittings in support of Regulation (EU) 2016/426 of the European Parliament and of the Council
• Ref Project: EN 509:2024/prA1 - Decorative fuel-effect gas appliances

Relations

• Revises: SIST EN 509:2025 - Decorative fuel-effect gas appliances
• Effective Date: 01-Sep-2025

Overview

The SIST EN 509:2025/oprA1:2025 standard, developed by CEN (European Committee for Standardization), defines the safety, construction, and marking requirements for decorative fuel-effect gas appliances. These appliances are designed to simulate the aesthetic of a solid fuel fire using one or more combustible gases, with a maximum nominal heat input of 20 kW based on net calorific value. Importantly, these devices serve decorative purposes only and are not intended as heating appliances.

This standard applies to Type BAS appliances, which are installed within non-combustible fireplace recesses or builder’s openings, as well as appliances installed under non-combustible canopies with specific requirements. It specifies construction, safety testing, and marking protocols to ensure compliance with European and national regulations while excluding catalytic combustion appliances or those with mechanically supplied combustion air or product evacuation.

Key Topics

• Scope and Applicability: Covers decorative gas appliances simulating solid fuel fires using natural draught burners for gases compliant with EN 437:2021 pressures.
• Construction Requirements: Specifies materials and methods ensuring durability even if condensation occurs during startup or operation, preventing safety hazards.
• Safety Components:
  • Flame supervision devices based on EN 125:2022+A1:2024 updates.
  • Electrical safety compliant with EN IEC 60335 series standards.
• Performance Testing: Includes updated test procedures for:
  • Measurement of oxides of nitrogen (NOx).
  • Gas pressure tests ensuring appliance integrity.
  • Incomplete combustion gas analysis.
• Marking and Identification: Appliances must be clearly marked following updated guidelines for electrical supply and reference gas types to guarantee traceability and regulatory compliance.
• National Deviations and Annexes: Special conditions tailored for Belgium (I2E+ category appliances), Switzerland (additional requirements for subclauses 6.6 and 6.7), and Type BBS appliances as outlined in annexes.

Applications

• Interior Decorative Installations: For use within buildings to visually mimic realistic fireplaces in residential or commercial settings without providing heating functionality.
• Fireplace Inserts: Installed into non-combustible built-in openings or fireplace recesses adhering to strict safety and construction requirements.
• Showrooms and Display Units: Ideal for retail or decorative display settings where a realistic flame effect enhances ambiance without heating needs.
• Hospitality and Leisure Sectors: Enhances atmospheres in restaurants, hotels, and lounges with authentic flame effects compliant with recognized safety standards.

Related Standards

• EN 437:2021 - Governs gas pressures and types suitable for appliances covered by EN 509.
• EN 125:2022+A1:2024 - Details requirements for flame supervision devices used within these decorative appliances.
• EN IEC 60335-1:2023 and EN IEC 60335-2-102:2024 - Provide safety requirements for household and similar electrical appliances including gas appliances connected electrically.
• CEN/TR 1404:2024 - Technical report on emission measurements of gaseous fuel burning appliances, referenced for NOx measurement guidance.
• National annexes specifying additional requirements and deviations for specific countries such as Belgium and Switzerland ensure compliance with local regulations.

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SIST EN 509:2025/oprA1:2025 establishes a comprehensive framework for the safe design, testing, and use of decorative fuel-effect gas appliances within Europe. Its focus on safety, emissions control, and clear marking ensures manufacturers and users can trust these appliances for aesthetic enhancement without heating function. Compliance with this standard is essential for market access and aligns with EU Regulation 2016/426/EU on gas appliance safety.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2025
Plinski aparati z dekorativnim plamenom - Dopolnilo A1
Decorative fuel-effect gas appliances
Dekorative Gasgeräte mit Brennstoffeffekt
Appareils à effet décoratif de combustion utilisant les combustibles gazeux
Ta slovenski standard je istoveten z: EN 509:2024/prA1
ICS:
97.100.20 Plinski grelniki Gas heaters
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
EN 509:2024
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
August 2025
ICS 97.100.20
English Version
Decorative fuel-effect gas appliances
Appareils à effet décoratif de combustion utilisant les Dekorative Gasgeräte mit Brennstoffeffekt
combustibles gazeux
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 62.

This draft amendment A1, if approved, will modify the European Standard EN 509:2024. If this draft becomes an amendment,
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN 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.
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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 509:2024/prA1:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Modification to Clause 2, Normative references . 4
2 Modification to 5.1.2, Materials and method of construction . 4
3 Modification to 5.1.7, Electrical equipment . 4
4 Modification to 5.2.7, Flame supervision devices . 4
5 Modification to 5.2.8.2, Non-automatic burner system . 4
6 Modification to 6.6.3, Measurement of oxides of nitrogen, NO (all appliances) . 5
x
7 Modification to 7.1.4, Test pressures . 5
8 Modification to 7.7.1, General . 5
9 Modification to 7.7.2.2, Incomplete combustion gas . 5
10 Modification to 7.7.4, Measurement of oxides of nitrogen . 6
11 Modification to 7.8.3.1, Cold condition . 6
12 Modification to 8.1.1, Marking of the appliance . 6
13 Modification to 8.1.3.1, Electrical supply . 6
14 Modification to 8.1.3.2, Type of gas . 6
15 Addition of Annex ZA (informative) . 7
16 Modification to the Bibliography . 9

European foreword
This document (EN 509:2024/prA1:2025) has been prepared by Technical Committee CEN/TC 62
“Independent gas-fired space heaters”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequentially 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.
1 Modification to Clause 2, Normative references
Replace the following:
“EN 125:2022” with “EN 125:2022+A1:2024”;
reference EN 60335-1:2012 with “EN IEC 60335-1:2023, Household and similar electrical appliances —
Safety — Part 1: General requirements (IEC 60335-1:2020)” and replace the text of the corresponding
footnote to text with “As impacted by EN IEC 60335-1:2023/A11:2023.”;
reference EN 60335-2-102:2016 with “EN IEC 60335-2-102:2024, Household and similar electrical
appliances - Safety - Part 2-102: Particular requirements for gas, oil and solid-fuel burning appliances
having electrical connections (IEC 60335-2-102:2017)” and add the following corresponding footnote to text
“As impacted by EN IEC 60335-2-102:2024/A11:2024.”.

2 Modification to 5.1.2, Materials and method of construction
Replace paragraph 7 with the following:
“The appliance shall be designed so if condensation is produced at the start-up and/or during the normal
...