Boiler Efficiency Directive (92/42/EEC)

What is the Directive about?

The Boiler Efficiency Directive (92/42/EEC) relates to the efficiency requirements for new hot-water boilers, looking into improving energy efficiency and the subsequent reduction in the emissions of carbon dioxide from standard, low temperature and gas condensing boilers (4 - 400 kW output).

The Directive forms part of the European Union’s SAVE program (Specific Actions for Vigorous Energy Efficiency) and specifies minimum levels of efficiency that new hot water boilers sold in the United Kingdom must operate at whilst running at full load or part load conditions.

The directive is expected to be recast in the near future as an implementing measure under the EU directive on energy-related products.

We offer technical advice, testing and CE Marking for this directive. We can help you to understand the regulations.

Who is the Directive for?

This Directive is relevant for manufacturers of hot water boilers wishing to sell products in Europe. Once the requirements of the Directive have been met then a manufacturer will be able to apply CE marking to their products.

What products does the Directive cover?

The Directive covers heating boilers from 4kW up to 400kW output, using natural gas, LPG or oil as their fuel source.

The directive specifies efficiency limits for “standard”, “low temperature” and “condensing” boilers.


The directive excludes:

solid fuel boilers,

water heaters (for sanitary purposes),

one-off appliances,

and appliances using fuels that are not commonly marketed (eg: biogas).

Our commitment to service and expertise

As a Notified Body for the Gas Appliance Directive we have a wealth of expertise in this industry. We have a team of experts who can help you to meet the requirements of the Directive. Our Loughborough site has a dedicated laboratory where we can provide you with ongoing support. We can also help you gain certification to other schemes giving you even greater market access.


Our testing service means more than producing a report. We’ve been experts in product certification and testing for over 60 years. With us you can be confident of the integrity of the certification and testing services for your products. Plus we provide innovative and efficient testing and certification solutions, saving you time and money.

Our certification managers, client managers, laboratory technicians and business development managers have a thorough understanding of the intricacies of the testing process and can help you every step of the way.