Abstract— In this project we study a school building where users for many years have complained about health problems. The symptoms reported are often nonspecific and are also common among the population in general, such as headache, fatigue, mucosal and skin problems. The purpose of this project is to investigate whether physical deficiencies in the indoor environment can be identified by measurements that can be linked to the health problems that users complain about. The starting point is to use a working model that not only seek damages in the building itself as the cause of the problems, but considering all polluting factors affecting the air environment. The measurement results, both the survey and the study of the physical measurements, show that there are problems with the air environment in the school building. The study shows that a link has been identified, that is the physical measurements show deficiencies in the air environment that is directly linked to the health problems that users complain about. Through a program of action a significant improvement of the indoor environment has been achieved, since the unhealthy emissions have been eliminated. Dry air prevails most of the year in the school building, below 40% and periodically below 20%. The cause of the dry air, are the air flows that the ventilation system creates. In Sweden the authorities pose far-reaching demands on the ventilation flow, causing technological systems installed to create these air flows. This would however go beyond the framework of this project.
Keywords— Hygiene and Health, Indoor Air quality, Indoor Humidity, Indoor Temperature.
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