VentoLife is an unobtrusive system that is built into windows for automatic air purification and oxygen supply. It is suitable both for residential and office buildings, mainly in cities and urban areas with high pollution levels. The ventilation system is equipped with a multi-stage air purification filter which removes pollutants as well as particulates and so provides a better atmo-spheric environment indoors. A sensor-operated flap adds fresh outside air as required to guarantee high air quality in the building at all times.