Download: High Performance Windows and Chassis of the Future: CSTB PREBAT ADEME

International comparison Building and energy. Transparent walls with high thermal performance in Northern Europe. CSTB, Prebat, ADEME, PUCA

Summary document on ongoing research and development on opening elements and windows in order to improve their thermal or acoustic performance. (U <1 W / m².K) National and Local Context

It is in Northern (Scandinavian countries) and Central Europe (Germany, Austria, Switzerland) that the development of transparent walls (windows and bay windows – glazing + frames) with high performance thermal insulation (U < 1 W/m². K) is the most significant. This report mainly focuses on thermal insulation and therefore the U coefficient. Indeed, the reduction of losses constitutes a major axis for saving energy. However, as part of a global approach to the building, the window should not be seen only from a “loss” point of view but also from a “gain” point of view, in particular by taking into account solar and light input. , without forgetting the acoustic performance. The common conditions encountered, which favored their development, are as follows:

  • a harsh climate and a long cold season
  • a strong energy dependence on foreign countries (with the possible exception of Norway, which despite everything has developed a program of low-energy buildings: the Smart Energy Efficient Building - SmartBygg project)
  • a high cost of providing energy (transport, distribution networks)
  • strong public awareness of environmental issues
  • unspecific building codes, often open to innovation
  • a commitment by the public authorities at national or local level (specific national R & D programs with substantial budgets, local initiatives promoting ecological solutions and with good energy efficiency). At the local level, some actions are carried out to combine energy efficiency and ecological aspects. The budgets dedicated to these activities can be very significant at the level of certain countries (Austria for example)
  • the presence of labels or certification devices (Passivhaus, Minergie) to signal the energy performance of buildings and structures. These mechanisms bring together lobbying and energy efficiency groups and promote demonstration operations.
Read also:  Download: Understanding the global crisis 1929 and its consequences, as well as the current economic crisis

Moreover, in most of these countries, resource management and environmental constraints appear to be the main drivers of the development of technologies that reduce the energy needs of buildings. In addition, all these countries are committed to reducing their greenhouse gas emissions (Kyoto Agreement).

Locally, as in Austria, where tourism is an important resource, the preservation of natural sites leads to a collective awareness of the need to preserve energy, which remains the largest producer of greenhouse gases (GHGs). during production, transportation and consumption.

In most countries, the development of windows and windows with high thermal performance remains limited. The choice to install high-performance joinery remains voluntary: national or local regulations are not binding and do not impose
performance levels involving windows and bay windows with high thermal performance (U <1 W / m2 C), even if the performance calculation codes evolve on this point.

Read also:  Download: HVP: combustion of palm oil
The pioneers in this area are Germany, Austria and Switzerland. It should be noted that calculation codes and regulations are constantly evolving in most countries and that the products that emerge today will become the rule tomorrow. Certifications or labels (voluntary) encourage the development of high thermal performance bay windows:

  • Passiv haus (Germany Austria)
  • Minergie (Switzerland France)

These labels impose today high levels of performance (0,8 W / m2 K) and encourage window manufacturers to offer adapted products.

In addition, professional or environmental associations promote energy savings and high energy performance among public decision-makers.

In most countries, incentive mechanisms to save energy have been put in place. The incentive takes the form of bonuses or tax credits. In the United States, for example, the installation of high-performance Energy Star-labeled windows allows you to benefit from a tax credit of 10% of the purchase price, with a maximum of $ 200.

Read also:  Download: Map pantone engine for Citroen 2CV

More: double or triple glazing?

Download file (a newsletter subscription may be required): The high performance windows and frames of the future: CSTB PREBAT ADEME

Leave comments

Your email address will not be published. Required fields are marked with *