The attention to indoor air quality (IAQ) is required especially in all the contexts which host a large\ud number of users, especially healthcare facilities in which there are several vulnerable users. IAQ is affected\ud by several factors related to the occupants, their activities, building layout and its materials, ventilation and\ud thermal parameters, maintenance, and cleaning activities. Currently, the attention in IAQ issue is not only\ud faced by developed countries, but also from developing countries. There are several international working\ud groups that are realizing monitoring campaigns. The paper presents a brief analysis of IAQ monitoring on\ud some international hospitals. The selection is focused especially on chemical indoor air pollutants, but it\ud lists also some experiences on air biological contamination. The intent is to examine the methodologies\ud applied and the main results that the monitoring campaigns have reported

Introduction. The Indoor Air Quality is a topic that in recent years is obtaining great attention in\ud healthcare facilities. Several studies are reporting a growing number of data and research works that allow\ud to know all the possible indoor levels and the development of management procedures (such as materials’\ud choice, products for cleaning and disinfection, improvement of HVAC system, etc.) in order to improve\ud the healing environments and health of medical and technical staffs, patients, ambulatory users and\ud visitors. Ensuring a good IAQ in hospitals is fundamentally because there are the most vulnerable category\ud of the population for their health conditions; although the assessment of IAQ results arduous.State of the Art. Currently in several countries are carried out air quality monitoring in those professional\ud workplaces in which chemicals are used (i.e. operating rooms, sterilization, anticancer preparation, etc.),\ud but also in some typically indoor spaces for the building hygiene evaluations. Therefore it determinated the\ud definition and adoption of limits (occupational exposure limit values, threshold limit value of the Scientific\ud Committee on Occupational Exposure Limits-VLEP or American Conference of Governmental Industrial\ud Hygienists-TLV to be used exclusively in workplaces) or values and guidelines (such as in the case of\ud indoor assessments, in particular the WHO’ indoor air quality guidelines).\ud Methodology. Starting from these considerations, Istituto Superiore di Sanità and Politecnico di Milano\ud have launched a research work for the evaluation and detection of air quality in inpatients rooms. The\ud survey is examining formaldehyde and VOCs, and the relative influence of thermo-hygrometric,\ud ventilation and concentration of pollutants’ parameters.\ud Discussion. This paper reports the results obtained from the indoor air monitoring in inpatient rooms. Each\ud survey, done every month, lasted between 5 and 7 days in relation to the real function use of the rooms.\ud Conclusion. The analysis is continuing on the inpatient rooms for controlling the indoor air values even in\ud summer season, and, in parallel, it is expanding to more health facilities in Lombardy and Latium regions