Recent years have seen significant progress in energy efficiency in all kinds of buildings, business parks and housing estates. The principles of 'Trias Energetica' provide the cornerstone to creating solutions in both existing buildings and new development that can be sustained for generations to come. And by working to create energy-efficient solutions in the places where we work and live, Ecofys ultimately contributes to improving the quality of life. On the factory floor or in our living rooms. At work and at play.