Jarek Kurnitski is a professor at the Tallinn University of Technology, Estonia, and at Aalto University, Finland. He is the chair of the REHVA Technology and Research Committee and is currently leading the REHVA COVID-19 Task Force preparing European HVAC and ventilation guidance for the epidemic situation. He is the leader of the Estonian Center of Excellence in Research ZEBE, Zero Energy and Resource Efficient Smart Buildings and Districts. He is internationally known for the preparation of technical definitions for nearly zero-energy buildings through many activities with the REHVA Technology and Research Committee and for contributions to European standards. He has been deeply involved in the work to improve the energy efficiency and indoor climate of the built environment in Estonia and Finland, with major contributions in the development of dynamic simulation-based energy calculation frameworks for present energy performance regulations. He has been recognised with scientific awards from the professional associations SCANVAC (2000), REHVA (2005), and the Estonian state research award (2018). His list of publications includes more than 500 items.