New technical standards for gas water heaters: what manufacturers and importers must do in 2026

Key data

Manufacturers and importers of gas water heaters operating in Europe have a critical date ahead: 20 July 2026, the date of entry into force of Implementing Decision (EU) 2026/1717. This standard establishes the harmonized technical specifications that allow access to the single market without additional conformity assessments, but it also sets the bar that cannot be ignored if you want to continue selling in the EU.

The decision provides technical support to two already applicable European regulations: Regulation (EU) No 814/2013, on ecodesign requirements, and Delegated Regulation (EU) No 812/2013, on energy labelling. Now, with the harmonized standards published in the Official Journal, companies have a clear technical roadmap to demonstrate that their products comply.

What does this regulation establish?

Harmonized standards are technical specifications developed by European standardization bodies and published in the Official Journal of the EU. Their function is concrete: when a manufacturer applies these standards to their product, it is automatically presumed that they comply with the essential requirements demanded by the ecodesign and energy labelling regulations. No additional technical assessment is needed to prove it.

This Implementing Decision establishes which harmonized standards are specifically applicable to gas water heaters, in support of the two aforementioned regulations:

The publication of these standards in the Official Journal has a direct legal effect: products that comply with them enjoy presumption of conformity with essential requirements, which significantly simplifies the process of placing them on the market in any EU Member State.

Economic and operational impact

The impact of this regulation translates into two very different scenarios depending on each company's starting position:

• Companies that already comply or are adapting: They obtain presumption of conformity without the need for additional technical assessments, which reduces certification costs and speeds up commercialization in the 27 Member States. Access to the single European market is simplified.
• Companies that do not adapt: They face marketing restrictions in any EU Member State. This may involve product withdrawal from the market, customs blockades for importers, or administrative sanctions according to each country's legislation.

From an operational perspective, companies must review both the technical design of their products (to comply with Regulation 814/2013) and the energy labelling information (to comply with Regulation 812/2013). Both fronts require an internal review of manufacturing processes, technical documentation and marketing or installation materials.

Who does it affect?

• Manufacturers of gas water heaters with production destined for the European market, regardless of where their facilities are located.
• Importers who introduce gas water heaters into the EU market from third countries.
• Distributors who market these products in the EU and must ensure that the products they offer comply with current harmonized standards.
• Purchasing and quality departments of installation or distribution companies that select gas equipment suppliers.
• Compliance and technical directors of companies in the heating, industrial plumbing and energy sectors.

Practical example

A Spanish manufacturer of gas water heaters that exports its product range to France, Germany and Italy currently has technical documentation based on previous harmonized standards. With the publication of Implementing Decision (EU) 2026/1717, it must review whether the new harmonized standards referenced in this decision differ from those it already applies.

If the new standards introduce changes in test methods or in the efficiency parameters required by Regulation (EU) 814/2013, the manufacturer will need to update its technical documentation and, if necessary, conduct new tests to maintain presumption of conformity. If it does not do so and continues to market the product with outdated documentation, market surveillance authorities in any Member State can prevent the sale or require product withdrawal.

For an importer bringing water heaters from an Asian manufacturer, the impact is equally direct: it must require its supplier to ensure that products comply with the new harmonized standards and that the EU declaration of conformity is updated in accordance with Decision 2026/1717.

What should companies do now?

1. Identify affected products: Review the catalog of gas water heaters marketed or imported in the EU and determine which are subject to Regulations (EU) 814/2013 and 812/2013.
2. Consult the new harmonized standards referenced: Access the full text of Implementing Decision (EU) 2026/1717 published in the Official Journal of the EU and identify the specific normative references.
3. Compare with current technical documentation: Verify whether existing tests and technical documentation cover the requirements of the new harmonized standards or if an update is necessary.
4. Update the EU declaration of conformity: If differences are detected, update the declaration of conformity and the product technical file to reflect the new applicable standards.
5. Review energy labelling: Check that product energy labels comply with Delegated Regulation (EU) 812/2013 in light of the new technical specifications.
6. Communicate with the distribution chain: Inform distributors and industrial customers of changes to prevent products with outdated documentation from being marketed.

Official source

Consult complete regulation in official source

Notice: This article is for informational purposes only and does not constitute legal advice. For specific decisions, consult a qualified professional. Source: https://eur-lex.europa.eu/./legal-content/AUTO/?uri=OJ:L_202601717