A visual ventilation guiding device (VVGD) - Development and validation for use in dwellings and schools

A visual ventilation guiding device for instant estimation of indoor air quality has been developed for that study. The VVGD converts the signals of a gas sensor and a temperature and humidity sensor into an optical recommendation of how to act for the users (open or close the window). The device has been tested and calibrated in dwellings, flats and schools. Results and conclusions are presented.