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OVERVIEW - CEN Standards to Support the Recast EPBD: Where Are We Now?

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A calculation methodology based on European standards makes it possible to harmonise the various measures for improved energy efficiency in buildings across Member States. A common methodology increases the accessibility, transparency, comparability and objectivity of energy performance certification, as recommended in the Energy Performance of Buildings Directive (EPBD).

Here you can download the PDF version of this Overview article (see below under 'Additional documents').

Enjoy reading, and feel free to send a comment of your own!


What is happening with CEN standards?

The use of European standards for calculating energy performance (and for energy performance certification, and the inspection of heating systems and boilers, ventilation and air-conditioning systems) will increase the accessibility, transparency, comparability and objectivity of energy performance certification across the Member States and reduce costs compared to developing separate standards at national level. At the same time, to facilitate implementation of the EPBD and the setting of energy performance requirements by the Member States, the standards should be flexible enough to allow for necessary national and regional differentiation. This combination is a challenge that called for a follow-up on the first set of CEN standards to support the EPBD (2007-2008).

The work to prepare a second generation of CEN standards, in support of the recast EPBD, started a few months ago with a new mandate from the European Commission to CEN (M/480). The leading CEN experts use the BUILD UP tools for communicating latest developments of their work and progress to the general public.


In the dedicated BUILD UP community Energy performance calculation procedures and CEN standards ( we present information on the standardisation process: the goals, work plan, specific discussion items and interim results. This is key, digestible information for policy makers, building professionals, educators and standards writers.

Join the community now to engage with the rapid and very interesting developments.


Getting started

For starters, familiarise yourself with the territory and check out:


Keeping you up-to-date

Activities in the current work on ‘second generation’ of CEN standards are detailed in a series of blogs. Well worth a look:

The news section is one to watch, with regular updates such as


CEN and EPBD Communities on BUILD UP

Far from being isolated, the BUILD UP community Energy performance calculation procedures and CEN standards interacts closely with other BUILD UP communities, in particular:


After reading P92 EPBD buildings platform, we think that the interestig standard would be one where the focus is not on the procedure, but on the inputs (including boundary conditions) and outputs. The methods that solve the problem would be classified as simple, medium or detailed (complex) according to the amount and type of the input information (not accoring to monthly, simple hourly, or detailed hourly). Also the degree of accuracy of the output should be classified accordingly. It could be something like the bestests standard. Several cases very detailed whose input information could be used in full or a subset be inferred to be used in a certain procedure and then check if the method give a "reasonable answer" (looking at certain outputs) according to the input. At the end, whether the method can be applied by hand or not, nowadays professionals end using a PC.