Between November 23 and 25, the event “The Online International Winter School TUCN 2022 – Energy Efficiency in Buildings” will take place, organized through the Microsoft Teams platform. During the three days, the main topics regarding the field of energy efficiency of buildings will be debated, in the context of reaching the targets of design and energy rehabilitation at zero emission levels (i.e. Zero Emission Buildings) until the year 2050. The lecturers who will give presentations are teaching staff and researchers from renowned universities at European level, as well as specialists in the design and execution of ZEB buildings. The event is aimed at students, teachers and graduates interested in the vast field of building energy.