EN 509:2024/FprA1
(Amendment)Decorative fuel-effect gas appliances
- Abstract
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.
- Status
- Not Published
- Publication Date
- 17-Mar-2027
- Technical Committee
- CEN/TC 62 - Independent gas-fired space heaters
- Drafting Committee
- CEN/TC 62/WG 3 - Chairman's Advisory Group
- Current Stage
- 4599 - Dispatch of FV draft to CMC - Finalization for Vote
- Start Date
- 07-Aug-2026
- Due Date
- 11-May-2026
- Completion Date
- 07-Aug-2026
EN 509:2024/FprA1 is a CEN draft amendment to EN 509:2024 for decorative fuel-effect gas appliances. It updates the European standard for appliances with a nominal heat input not exceeding 20 kW, covering construction, safety, marking and test methods for decorative gas fires used for appearance rather than space heating.
The document applies to appliances that simulate a solid fuel fire, use a natural draught burner with or without an ignition burner, and burn one or more combustible gases from the three gas families at the pressures stated in EN 437:2021. It also supports conformity work for Type BAS appliances, canopy-installed appliances, and the special national or type-specific conditions listed in its annexes.
What does EN 509:2024/FprA1 specify?
EN 509:2024/FprA1 specifies amendments to the requirements and test methods in EN 509:2024 for decorative fuel-effect gas appliances. It keeps the focus on construction, safety, marking and type testing, while updating references and several detailed test and marking clauses.
The scope keeps these appliances distinct from heating appliances. It also excludes catalytic combustion appliances and appliances that use mechanical means to supply combustion air or remove combustion products. The note on energy use matters in practice because the standard is written for decorative performance and safety, not energy-efficiency claims.
| Annex | What it covers |
|---|---|
| Annex A | Additional requirements for appliances installed under a non-combustible canopy, independent or integral with a flue box |
| Annex C | Special national conditions for appliances of category I2E+ marketed in Belgium |
| Annex D | Special A-deviations for appliances in Switzerland, including extra requirements for 6.6 and 6.7 |
| Annex F | Additional requirements for Type BBS appliances |
| Annex ZA | Relationship with EU-Regulation 2016/426/EU and its conformity mapping |
What are the key requirements of EN 509:2024/FprA1?
Construction and durability
Clause 5.1.2 adds a condensation-related construction requirement. If condensate forms during start-up or normal operation, it must not damage the appliance or its materials in a way that affects safety, and it must not drip outside the appliance.
That matters for enclosed decorative gas fires, because moisture can appear during ignition and steady operation. Manufacturers need to show that materials, joints and drainage paths remain safe under those conditions.
Clause 5.1.7 also updates the electrical equipment reference to the newer EN IEC 60335-2-102:2024. In practice, this aligns the appliance standard with the current electrical safety document used for gas, oil and solid-fuel burning appliances with electrical connections.
Test methods and measurements
Clause 6.6.3 changes the way oxides of nitrogen are measured. The standard now requires measurement of NO concentration in the air-free, dry products of combustion when tested under 7.7.4, and the earlier table in that clause is deleted.
Clause 7.7.4 revises the NOx test procedure. The test is run under the conditions in 7.1.5 using the reference gas or gases at normal pressure, and the NOx result must be recorded in the appliance test report. That makes the emissions record part of the formal type-test documentation.
Clause 7.1.4 updates how test pressures are handled, and 7.7.1 and 7.7.2.2 update the tables used for neutral combustion and incomplete combustion gas. For laboratories, that means the pressure and combustion checks must be carried out against the revised table structure.
Marking and identification
Clause 8.1.1, 8.1.3.1 and 8.1.3.2 update marking and electrical-supply references, including the way the type of gas is identified. The type-of-gas marking must use the symbol of the reference gas common to the relevant category indices.
In practice, this helps avoid incorrect product identification on the appliance label and in installation or certification documents. It also keeps the appliance marking aligned with the revised gas and electrical references.
EU conformity link
Annex ZA maps the standard to Regulation 2016/426/EU on appliances burning gaseous fuels. For manufacturers and conformity assessment bodies, this annex shows which clauses support presumption of conformity when the standard is cited in the Official Journal of the European Union.
What terms does EN 509:2024/FprA1 define?
- Appliance - a decorative fuel-effect gas appliance within the scope of the standard, with a nominal heat input up to 20 kW.
- Type BAS - an appliance designed to be installed within a non-combustible builder's opening or a non-combustible fireplace recess.
- Type BBS - a separate appliance type covered by additional requirements in Annex F.
- Natural draught burner - a burner that operates by natural draught rather than mechanical air supply.
- Reference gas - the gas used for classification, adjustment or testing, including the gas symbol required for marking.
- NOx - oxides of nitrogen, measured during the combustion test and recorded in the test report.
- Category I2E+ - a gas category mentioned for the Belgian national conditions in Annex C.
Who uses EN 509:2024/FprA1?
EN 509:2024/FprA1 is used by manufacturers of decorative gas fires, product designers, and test laboratories that type-test appliances for safety, emissions and marking. It is also used by certification and compliance teams preparing technical files and test reports for market access.
Buyers, specifiers and quality managers use it to check whether a product is intended for a builder's opening, a fireplace recess or a canopy installation, and whether it falls under the special conditions for Belgium, Switzerland or Type BBS appliances. That helps them choose the right product variant and documentation for the intended market.
What changed in EN 509:2024/FprA1 from the previous edition?
EN 509:2024/FprA1 updates the base standard EN 509:2024 by revising key references and several technical clauses. The amendment:
- replaces and updates references to EN 125:2022, EN IEC 60335-1:2023 and EN IEC 60335-2-102:2024;
- adds a new condensation requirement in 5.1.2;
- revises the NO and NOx measurement provisions in 6.6.3 and 7.7.4;
- updates test-pressure, combustion and cold-condition table references;
- updates marking and gas-identification clauses;
- adds informative Annex ZA;
- updates the Bibliography with CEN/TR 1404:2024.
Which standards are used with EN 509:2024/FprA1?
- EN 437:2021 - gives the gas families and pressures used to identify the applicable combustible gases.
- EN 125:2022+A1:2024 - is the referenced standard for flame supervision devices and the non-automatic burner system references.
- EN IEC 60335-1:2023 - provides the general safety requirements for household and similar electrical appliances used in the electrical parts of the appliance.
- EN IEC 60335-2-102:2024 - provides particular requirements for gas, oil and solid-fuel burning appliances with electrical connections.
- CEN/TR 1404:2024 - gives details for NOx measurements during type testing.
What does the EN 509:2024/FprA1 document contain?
EN 509:2024/FprA1 is a clause-by-clause amendment document. It revises the normative references, construction requirements, electrical equipment provisions, flame supervision device references, burner-system references, emissions measurement clauses, test pressures, combustion-test clauses, cold-condition testing, marking, electrical supply identification and gas-type marking.
It also adds informative Annex ZA for the link to EU-Regulation 2016/426/EU and updates the Bibliography to CEN/TR 1404:2024. The amendment changes the table numbering used in the test clauses, so laboratories and compliance teams need to read it together with the base standard when preparing type tests and appliance documentation.
Relations
- Effective Date
- 31-Jul-2024
Frequently Asked Questions
EN 509:2024/FprA1 is a draft published by the European Committee for Standardization (CEN). Its full title is "Decorative fuel-effect gas appliances". This standard covers: 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.
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.
EN 509:2024/FprA1 is classified under the following ICS (International Classification for Standards) categories: 97.100.20 - Gas heaters. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 509:2024/FprA1 has the following relationships with other standards: It is inter standard links to EN 509:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 509:2024/FprA1 is associated with the following European legislation: EU Directives/Regulations: 2016/426; Standardization Mandates: M/369, M/595. 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.
EN 509:2024/FprA1 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-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.
EN 509:2024/prA1:2025 (E)
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
EN 509:2024/prA1:2025 (E)
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.
EN 509:2024/prA1:2025 (E)
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
...