The research of Professor Thomas Olofsson focuses on reducing building energy end-use with improved indoor climate. The scope is to propose, implement, and evaluate strategies for increased energy performance and thermal comfort, evaluate building energy efficiency, and parameter identification. Methods include analytical models, such as, for example, simple regression models and more complex data-driven approaches, as well as physical simulations. Investigations also have a user and stakeholder perspective to map behavior, perception, adaptation, and attitudes. Studies include HVAC-systems and indoor climate, building components, building construction systems, and district heating.