Caru air stands for Swiss quality. That's why they rely on the high-quality CO2 sensor from Sensirion for efficient and sustainable ventilation, especially during the cold autumn and winter months. The air is fresh, with CO2 levels below 1000 ppm. Ventilating is quick and often gets forgotten. It's even better when everyone in the room helps out. With Caru air, this is now very simple. Because anyone can read traffic lights, and it's also fun to do.