31 Aug 2026
What Does It Mean That EN 497 Is Not Listed as an EU Harmonised Standard?
In July 2026, the European Commission published Commission Implementing Decision (EU) 2026/1750, deciding not to list EN 497:2022 and EN 17476:2021+A1:2022 in the Official Journal of the European Union as harmonised standards supporting the Gas Appliances Regulation. One particular point of concern regarding EN 497:2022 is that the standard does not require a Flame Supervision Device (FSD). This does not mean that EN 497:2022 has been banned or is no longer valid. Rather, it highlights an important distinction: the technical content of an EN standard and its legal status within the EU regulatory framework are two different matters.
Source: European Commission, Commission Implementing Decision (EU) 2026/1750
The Existence of an EN Standard Does Not Necessarily Mean It Is an EU “Harmonised Standard”
When looking at this decision, one of the first points that can easily cause confusion is the difference between an EN Standard and a Harmonised Standard.
An EN Standard (European Standard) Note 1 is a technical standard developed within the European standardisation system. A Harmonised Standard Note 2 , on the other hand, is a European standard that has been formally cited by the EU to support specific requirements of EU legislation.
For gas appliances, one of the key pieces of legislation is the GAR Note 3 , or Regulation (EU) 2016/426 on appliances burning gaseous fuels.
When the reference of an EN standard is officially published in the Official Journal of the European Union (OJEU) Note 4 as a harmonised standard supporting the GAR, manufacturers that comply with the requirements covered by that standard may benefit from what is known as the Presumption of Conformity Note 5 .
In simpler terms:
Compliance with an officially cited harmonised standard can provide an important basis for demonstrating conformity with the GAR essential requirements covered by that standard.
Therefore, Decision (EU) 2026/1750 does not mean that “EN 497 has been withdrawn.” Rather, the EU decided not to list EN 497:2022 as a harmonised standard supporting the GAR.
EN 497:2022 itself still exists and continues to have technical reference value. However, compliance with this standard alone cannot provide the Presumption of Conformity under Article 13 of the GAR.
Why Has Flame-Failure Safety Become a Key Concern?
EN 497:2022 applies to certain large outdoor LPG (Liquefied Petroleum Gas) boiling burners. When Germany raised a formal objection to the standard, one of the key concerns was that it did not require a Flame Supervision Device (FSD) Note 6 .
The safety scenario behind this concern is actually quite straightforward:
If the flame goes out, will the gas continue to flow?
For example, if an outdoor burner is extinguished by wind, operating conditions, or other factors while the gas supply continues, unburned gas may gradually accumulate in the surrounding area.
Another possible situation occurs when the gas supply has been opened but ignition is unsuccessful. If gas continues to flow, subsequent contact with a spark or another ignition source could result in rapid combustion or deflagration, creating a risk of burns and other injuries.
For this reason, the European Commission concluded that EN 497:2022 did not sufficiently address certain safety risks required under the GAR and ultimately decided not to list it as a harmonised standard supporting the Regulation.
This Decision Also Shows That Gas Safety Is a “System-Level Issue”
This decision does not directly require all gas valves to be re-certified. However, it highlights an important point worth considering across the industry: gas safety is rarely achieved by a single component alone.
In traditional gas appliances, for example, a Pilot Burner, Thermocouple, and Safety Gas Valve often work together to form a flame-failure safety system.
During normal combustion, the system confirms the presence of a flame and maintains the gas supply. If the flame is accidentally extinguished, the safety mechanism responds according to its design logic by closing the gas valve and shutting off the gas supply.
More modern appliances may use an Ignition Module, electronic Flame Detection, and a Gas Valve to establish a similar safety control architecture.
From the perspective of appliance designers and manufacturers, in addition to asking: “Which standard does this gas valve comply with?”
Another equally important question may be: “If the flame goes out or ignition fails, how does the appliance detect the abnormal condition, and how does it safely shut off the gas supply?”
Once the discussion expands from an individual component to the complete system, the interaction, response time, and safety logic between gas control components become increasingly important.
What Support Can Alpha Brass Controls Provide?
This EU decision does not mean that any particular existing product requires an immediate change. However, it once again highlights the role that gas control components play within the overall safety architecture of an appliance.
Safety Gas Valves, Pilot Burners, Thermocouples, Ignition Modules, and gas regulating components should be considered not only in terms of dimensions, flow capacity, and operating pressure, but also in the context of how they function within the actual appliance.
When participating in new product development or projects involving the European market, Alpha Brass Controls also works with appliance designers and manufacturers to discuss:
What safety function does each component perform within the complete appliance?
How does the system respond in the event of flame failure or ignition failure?
Can the available test data and technical documentation support the safety assessment of the complete appliance?
This also reflects how the role of a component supplier is gradually evolving from simply “providing a product that meets the specification” toward broader support in Safety, System Integration, and Compliance.
For Alpha Brass Controls, this is also an important direction behind our continued investment in gas control technologies and safety component integration.
Beyond the EN Number: One More Step Worth Checking
One practical takeaway from Commission Decision (EU) 2026/1750 is that the existence of an EN standard does not necessarily mean that it is a harmonised standard supporting a specific piece of EU legislation.
For appliance designers and manufacturers, product development and certification therefore involve more than identifying which EN standard applies. It is also useful to check whether that specific version has been formally cited in the OJEU and which GAR essential requirements it actually covers.
At the same time, the absence of a harmonised standard providing a direct Presumption of Conformity does not automatically mean that a product cannot be placed on the EU market. Manufacturers may still demonstrate compliance with the applicable regulatory requirements through appropriate risk assessment, testing, and technical documentation.
Looking at the case of EN 497:2022, the standard number is certainly important. But what matters even more is how the appliance actually responds when flame failure, ignition failure, or another abnormal condition occurs: can the complete gas control system respond correctly and safely shut off the gas supply?
That may be one of the most important points for the gas appliance industry to continue watching following this EU decision.
Technical Notes
1. EN — European Standard
A technical standard developed by the European standardisation organisations. The existence of an EN standard does not necessarily mean that it has become a harmonised standard supporting specific EU legislation.
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2. Harmonised Standard
A European standard whose reference has been formally published by the EU to support specific requirements of EU legislation. In this context, “harmonised” means aligned or coordinated with regulatory requirements; it does not mean that multiple standards have been merged into one.
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3. GAR — Gas Appliances Regulation
Formally Regulation (EU) 2016/426 on appliances burning gaseous fuels. It establishes essential safety and conformity requirements for gas appliances and related fittings placed on the EU market.
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4. OJEU — Official Journal of the European Union
The EU’s official publication for legislation, decisions, and information concerning harmonised standards. To determine whether a standard formally supports specific EU legislation, it is important to check not only the EN number but also whether its reference has been officially published.
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5. Presumption of Conformity
When a product complies with an officially cited harmonised standard, it may be presumed to comply with the EU regulatory essential requirements covered by that standard. This does not mean that the product automatically complies with every applicable regulatory requirement.
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6. FSD — Flame Supervision Device
A device used to confirm the presence of a flame. If the flame is accidentally extinguished, the safety system should shut off the gas supply to reduce the risk of continued accumulation of unburned gas.
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References
1. European Commission — Commission Implementing Decision (EU) 2026/1750
Explains the decision not to publish the references of EN 497:2022 and EN 17476:2021+A1:2022 as harmonised standards, together with the grounds for the formal objections.
2. Regulation (EU) 2016/426 — Appliances Burning Gaseous Fuels (GAR)
Article 13 explains the legal relationship between Harmonised Standards and the Presumption of Conformity.
3. European Commission — Harmonised Standards: Gas Appliances
The European Commission’s official page covering harmonised standards and implementing decisions related to gas appliances.
4. European Commission — Formal Objections to Harmonised Standards
Explains how EU Member States may raise formal objections to harmonised standards and how the European Commission subsequently addresses them.
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This article is provided for industry and technical information purposes and shares observations on recent developments in European gas appliance standards and safety controls. It should not be considered legal or certification advice for any specific product. Before placing a product on the EU market, its intended use, design, and applicable regulatory requirements should be assessed individually.