As more people occupy a space, carbon dioxide levels increase and there is less fresh air. Indoor exposure to this gas can affect performance and decision making and can also lead to headaches, restlessness and drowsiness. That is why it is important to act when its levels soar in work environments, schools, hospitality and fitness centers, either by reducing the number of occupants in a room or by increasing the ventilation rate (natural or mechanical). Nanoenvi IAQ uses a highly stable and accurate NDIR sensor with self-calibration capability for CO2 measurement.