Decentlab's indoor ambiance monitor continuously measures carbon dioxide (CO2) concentration, volatile organic compounds (VOC), temperature, humidity, barometric pressure, ambient light and motion/presence. These data allow quantifying the air quality, temperature, and illumination (ambiance) in offices, classrooms, hospitals, stores, or malls. These data also indicate the presence of people and how they move in a room. This allows to efficiently control heating, ventilation, air conditioning (HVAC) and illumination corresponding to the actual situation in a specific room.