Research in the area of building performance simulation is a wide concept. A distinction can be made between different topics related to simulation: simulation environments, development of design tools, (Simplified) methods, (feasibility) studies with use of building simulation, quality assurance of tools and simulations. This paper focuses on the development of design tools/environments and is limited to a few research developments: Climasim, developments at TNO, and the foundation of the Knowledge Center Buildings & Systems. In the area of development of design tools a number of parties varying from consultancy firms to universities are active. A short overview that is certainly not complete is: Deerns with HENK1, Technical Universities with Climasim, TNO Building and Construction research together with VABI2, TNO Mep for heating and cooling generation models, VABI with the building simulating program VA114 and the Uniform Environment, Krijger3 with DYWAG and the BINK environment, DWA4 with several tools for thermal storage concepts and energy savings. Because we are more familiar with it, in this paper we focus on research and developments at academic and not-forprofit research institutes in the Netherlands

• research, funding
• simulation of building process

1. A view of energy and building performance simulation at the start of the third millennium
2. Building Simulation '99. Proceedings of the 6th International IBPSA Conference, (Editors)
3. Integrated building simulation: state-of-the-art, Introducing Building Energy Simulation Classes on the Web
4. Introducing building energy simulation classes on the web
5. On the use of simulation in the design of embedded energy systems
6. Past, present and future plans of the International Building Performance Simulation Association -- IBPSA
7. Simulation for better building design
8. Simulation of building energy and indoor environmental quality - some weather data issues
9. Validation of external BES-CFD coupling by inter-model comparison