The project Increasing Energy Efficiency in Buildings (IEEB) has the following objectives: 1. Technological development of low-energy solutions in housing 2. Transfer of knowledge about energy solutions to the construction industry and the society 3. Measurement techniques to decrease energy consumption in both new and existing buildings 4. Measuring the energy consumption in existing buildings through the energy signature 5. Contribute in equalising standards and technical solutions for energy efficiency, thus leading to better prerequisites for international trade The IEEB project has several goals: 1. Build up a Nordic network for promoting energy efficiency of buildings. 2. Develop new competence, know-how and expertise in measuring energy loss to advance design of passive level houses. 3. One goal is to develop a method to characterise and predict the precision in energy performance. New solutions can then be proposed that decreases the variation in energy performance for the existing building stock. 4. Pick up best practises and recommendations, based on measurements and real-life information about energy consumption both for prefabricated private houses and public buildings. 5. Transfer this knowledge to building professionals, such as developers and designers of new buildings, but also building inspection authorities in the municipalities.