The buildings sector has been recognized, at international level, as one of the most impacting sector concerning the CO2 emissions. With the increasing improvement on building energy efficiency and Net Zero goals, Building Energy Simulations (BES) are becoming the standard. BES is proving to be an effective approach for supporting the design and operation of high-performance buildings, such as zero-energy buildings or zero-emission buildings. The Energy Efficient Buildings course will provide a basic understanding of the building energy simulation process with focus on national and international standards, building technologies and construction techniques. The main goal of the course is that the student will achieve the ability to independently identify and evaluate different energy conservation measures and controls for buildings through systematic analysis and simulation of the building’s energy performance.