The European standard series EN 16510 for residential solid fuel appliances has been expanded with additional parts. The new rules apply to slow heat release appliances, combination appliances burning both logs and pellets, and sauna stoves. Of particular importance for manufacturers is February 9, 2027, when the transition period for using the existing harmonized standards ends.
We have already discussed the transition to the new EN 16510 standard series and what it brings to manufacturers and users of stoves and fireplaces on the AEVD website wrote in detail. For a large portion of these appliances, a crucial date was November 9, 2025, when the transitional period between the original standards and the new EN 16510 series ended.
However, the development of European standards did not end there. In 2025, three additional parts of EN 16510 were published, and in February 2026, the European Commission published their references as harmonized standards for the purposes of the European Construction Products Regulation.
Now it is:
- EN 16510-2-5:2025 – slow heat release appliances,
- EN 16510-2-7:2025 – combination appliances burning wood logs and pellets,
- EN 16510-2-10:2025 – solid fuel saunas stoves.
For all three parts, a transition period began on February 9, 2026, which will end on February 9, 2027.
Storage heaters are transitioning to EN 16510-2-5
The EN 16510-2-5 standard concerns slow heat release appliances. These are primarily heat-retaining appliances that store part of the energy generated during combustion and subsequently release it gradually into the heated space.
The new standard replaces the existing EN 15250:2007, which specified the requirements and test methods for slow heat release appliances fired by solid fuels.
For manufacturers of these devices, the transition to the EN 16510 series thus means the need to review existing tests, technical documentation, and other documents related to placing products on the market.
Combination stoves for logs and pellets have their own standard
A significant new development is EN 16510-2-7, which is intended directly for combination appliances capable of burning both wood logs and pellets.
Until now, these devices were based on the requirements of standards intended for individual types of appliances – in particular EN 13240 for solid fuel stoves and EN 14785 for wood pellet appliances.
The new standard thus introduces a unified framework specifically for combination appliances. During the transition period until February 9, 2027, the existing standards EN 13240:2001 and EN 14785:2006 may also continue to apply to them.
New standard also for sauna stoves
The third change concerns wood-burning sauna heaters.
EN 16510-2-10:2025 replaces the current EN 15821:2010, which set out the requirements and test methods for this group of appliances.
Here, the transitional period of simultaneous existence of the old and the new harmonized standard also applies, i.e., until February 9, 2027.
Key date: February 9, 2027
There are several months left until the end of the transition period. Manufacturers of the appliances in question should therefore check well in advance what the transition to the new parts of EN 16510 means for their specific products.
They should use the time to check their products, in particular:
- test reports and results of previous tests,
- system of assessment and verification of constancy of performance,
- Declaration of Performance,
- technical documentation and product labeling,
- manufacturing execution system,
- instructions and other information provided with the product.
The scope of necessary changes may vary from product to product. The transition to a new standard also does not automatically mean that every previously tested product must be completely re-tested. The possibility of using the results of previous assessments must always be evaluated based on the specific product and the requirements of the new standard.
What is changing for stove owners?
The new standards apply primarily to manufacturers and the conditions for placing new products on the European market. They do not mean a ban on the use of stoves already in operation, nor do they impose an obligation on owners to replace their existing appliances.
