Navigation path



Published: 31 January 2014  
Related category(ies):
Energy  |  Environment


Countries involved in the project described in the article:
Denmark  |  Germany  |  Ireland  |  Portugal
Add to PDF "basket"

A smart window for optimal ventilation and minimal thermal loss

Efforts to improve exterior shells in buildings via better insulation materials in frames and glass have led to deterioration in the indoor air quality (IAQ), especially in older buildings. The EU-funded project Climawin has developed an “intelligent window” prototype for optimal ventilation and minimal thermal loss.

Photo of a window
© fotolia

“Climawin is designed to improve comfort by pre-warming ventilation air in temperate and cool climates, and by using solar gain to save overall energy in warm or hot climates,” says project representative, Brian T. O'Brien. “Through the optimisation of thermal insulation, solar energy gains and daylight control, the window is expected to significantly improve energy efficiency and thermal comfort in both residential and commercial buildings that do not have energy efficient ventilation systems,” explains O'Brien.

The window has a myriad of features which give it clear advantages over existing technology. They include integrated vents for controlled air intake, a frame with two layers of glazing, an automated blind, integrated electronics and wireless communication between room sensors and the windows. And according to O'Brien, the Climawin system is significantly cheaper than installing windows, ventilation air heating and background ventilation systems, as “it provides all three in one.”

Climawin will be a welcome addition to EU initiatives that are pushing for energy efficiency in buildings. “Windows are the largest source of heat loss in a building yet with Climawin, the energy lost through the glass by conduction can be regained in the incoming air, raising its temperature to improve comfort and, on southern orientations, to produce a serious energy profit,” explains O'Brien.

Test results and simulations with project partner Fraunhofer Institute show that a standard building fitted only with Climawin windows would improve its energy performance by between 18 and 24% and that incoming air temperatures could be raised by up to 15°C, improving comfort while at the same time providing 50% to 200% of the energy lost through ventilation.

A follow-on FP7 project intended to monitor a number of trial installations of Climawin system across Europe are expected to run in the next two years. Commercialisation is expected to start on a gradual basis over the same period, culminating in availability of the full product in 2013 or 2014, adds O'Brien .

With nearly €1.2 million in EU-funding under the Seventh Research Framework Programme (FP7), the Climawin project began in October 2010 and ran for a period of 24 months. Coordinated by Aalborg University in Denmark, the project had a total of seven partners from Germany, Portugal and Ireland.

More Information


Project details

  • Project acronym: CLIMAWIN
  • Participants: Denmark (Coordinator), Germany, Portugal, Ireland
  • Project FP7 262262
  • Total costs: € 1 574 354
  • EU contribution: € 1 187 142
  • Duration: October 2010 - September 2012

Convert article(s) to PDF

No article selected


Search articles

To restrict search results to articles in the Information Centre, i.e. this site, use this search box rather than the one at the top of the page.

After searching, you can expand the results to include the whole Research and Innovation web site, or another section of it, or all Europa, afterwards without searching again.

Please note that new content may take a few days to be indexed by the search engine and therefore to appear in the results.

Print Version
Share this article
See also

Project web site
Project information on CORDIS

  Top   Research Information Center