The research focused on the analysis of the interaction of the individual components of the system operationally efficient building – indoor environment quality – user has been conducted since 2014 in the Czech Republic by a research team of Banking Institute / College of Banking. The purpose of the research is the evaluation of advantages and disadvantages of operationally efficient buildings by their owners, users or facility managers. One of the most monitored research parameters is the rating of indoor environment quality and its influence in physical and psychological fitness and work performance of the building users. Next, there are also other relationships which are examined – as the importance of the indoor environment quality with regards to other building's parameters, its influence on the real estate market value and the users' willingness to participate on the creation and keeping of indoor environment quality. The interpretation of gathered data proved a significant difference of the individual users' demands in relation to their individual preferences. This fact is necessary to respect while design and managing the operationally efficient buildings.