Device for CO2 environmental concentration monitoring; adjustable threshold in the range 0 - 5,000 ppm. Exceeding the threshold value causes the switch on of the two VORTICE VARIO fans; the drop in the concentration of carbon dioxide below the safety value causes the fans switch off. • Integrated relative humidity sensor allows to show temperature and RH values. • Possibility to program, on a weekly basis, the switching on/off of the fans (ideal, for example, in the case of use in classrooms, refectories, canteens, etc.). • Possibility of integration into a building management system (BMS - Building Management System), Modbus protocol, integrated RS485 port. • Graphic display, for immediate understanding of system status and environmental parameters.