1) The document discusses practical tools for designing low-energy buildings, including thermal simulation software called Comfie+Pleiades and a life cycle assessment tool called EQUER. 2) It provides examples of modeling and simulating existing buildings, such as a school, as well as passive house designs. This helps validate the tools and evaluate retrofit and renewable energy strategies. 3) The Center for Energy and Processes develops these tools and provides training to help architects and others properly use the tools to design efficient, sustainable buildings.