IEE CENSE

Yes, but some of the required input data may not be available at reasonable costs. For those cases default values may be provided at national level, e.g. as function of type and age of construction. Question submitted by: Dick van Dijk (TNO, The Netherlands) Anwered by: Dick van Dijk, TNO (The Netherlands) and Brian Anderson, BRE (UK) Date: 2009/02/19
Post date: 10 Jun 2009
Type: Ask the Experts

Heat is lost from a building or building part by transmission or ventilation, as a result of a positive temperature difference between the indoor and outdoor (or other) environment. However, if the indoor temperature of the considered building or building part is lower than the temperature of the other environment (outdoor environment or another building part), the heat loss becomes negative. Therefore the more neutral term “heat transfer” was introduced from the 2007 versions of the EPBD related standards on.
Post date: 10 Jun 2009
Type: Ask the Experts

National documents define under which conditions the two methods are to be applied. The choice of method depends on several aspects. First the purpose of the assessment should be considered, as it influences the level of detail required. The type and complexity of the building and its technical system are also relevant parameters. In general, the holistic approach is applied for complex systems and when a high level of detail is required. More information: CENSE Information Paper P095 which can also be downloaded from the BUILD UP Portal.
Post date: 10 Jun 2009
Type: Ask the Experts

The purpose of this community is to provide a central convening point for information specifically on the current activities aiming at the major upgrading of the CEN standards to support the EPBD: The preparation of a second generation of CEN standards to support the EPBD, under the Mandate M/480 from the EC to CEN/CENELEC (http://www.buildup.eu/publications/25366).  
Post date: 10 Jun 2009
Type: Topic

All CEN standards (EN or EN-ISO) and draft standards (prEN or prEN-DIS) can be ordered from the National Standards Body organisation (NSB) (see www.cen.eu). All EPBD CEN standards were published in 2007 or 2008, as EN or EN-ISO standards. The total set contains 2000 pages. As usual, EN’s are published in English and, by choice of DIN and AFNOR, also published in a German or French version. It is up to the other NSB’s to decide if national language versions will be produced, depending on the target group as explained under the question: "Are CEN standards only available in English...
Post date: 1 May 2009
Type: Ask the Experts

CEN is the European Association of national standardisation institutes, the so called National Standards Bodies (NSB’s). These NSB’s are responsible for the contact with the interested market parties and experts preparing the CEN standards in the same way they do when preparing national standards. Members of CEN-Technical Committees (CEN-TC’s) are nominated by the NSB’s. The TC’s decide on the scope and content of a standard. The actual work is done in smaller CEN-TC-Working Groups whose expert members are nominated by NSB’s.
Post date: 1 May 2009
Type: Ask the Experts

There are several reasons why there is not just one CEN standard covering all EPBD aspects. The two main reasons are: 1. The CEN standards cover different types, with different application areas and different target groups, ranging from building designers and inspectors to specific specialists on building physics or systems (lighting, ventilation, cooling, heating, hot water, ..).
Post date: 29 Apr 2009
Type: Ask the Experts

The set of CEN-EPBD standards consists of 43 titles or parts and can be grouped as follows: The building physics standards, e.g. describing the calculation of heat transfer by transmission and ventilation, load and summer temperature, solar transmittance and the calculation of the energy need for heating and cooling of the building. In the second group there are standards on the description and properties (classification) of ventilation systems plus cooling and air conditioning systems.
Post date: 29 Apr 2009
Type: Ask the Experts

CEN/TR 15615 is not a standard, but a technical report and therefore the definitions (annex C) are not mandatory. However, most of the definitions are adopted also in the European standard EN 15603, which is one of the key standards in the set of standards to support the EPBD. It is intended that the annexes C and D of CEN/TR 15615 will form the basis of a future trilingual standard covering common definitions and symbols for energy calculations. Most Member States are planning to adopt the CEN standards in one way or another within a few years.
Post date: 29 Apr 2009
Type: Ask the Experts

To support the open EU market, more and more standards have been prepared as ENӳ. For building products this is even a requirement based on EU mandates to CEN according to the EU-CPD (Construction Product Directive). To stimulate an open EU market, construction products shall only be specified according to mandatory, socalled ԨarmonisedԠEN (or EN-ISO) standards.
Post date: 29 Apr 2009
Type: Ask the Experts