The service provides a system for monitoring the quality of indoor air in buildings by control of different parameters. Simulate the increase of carbon dioxide according to the occupation of space and type of metabolic activity. Inspection of the level of concentration of volatile organic compounds (assessment of the emission of materials and types of metabolic activity). Assessing the performance reduction system installed in order to obtain the comfort level (<200 m g/m3 TCOV ) according to the EU. Finally, a check is performed on the flow ventilation design for obtaining the appropriate level of comfort of indoor air quality.