CO2 'traffic lights'
Carbon dioxide 'traffic lights' for a good (indoor) climate
Since last winter, 230 measuring devices installed on the HKA campus have been helping to improve the quality of the indoor air, to save energy for heating and this make a contribution to climate protection.
28 September, 2023
Thanks to the collaboration between the Faculty of Electrical Engineering and Information Technology, where measuring devices that record various indoor air parameters were developed by Prof. Dr. Klaus Wolfrum and Dr.-Ing. Thomas Münch as project leaders, and the Department for Development, Construction and Infrastructure, 230 CO2 'traffic lights' have been installed throughout the seminar, lecture and meeting rooms at HKA since last winter. They help to save heating energy and thus make a contribution to climate protection. Efficient ventilation creates a hygienic indoor climate and avoids unnecessary heat loss.
The measured values provide an indication of the air quality. The LED changes to yellow or red depending on the CO2 concentration in the air. Window ventilation brings the value back to the CO2 concentration of the earth's atmosphere (approx. 400 ppm). The LED makes it possible to see from a distance whether a room needs to be ventilated.
With the help of instructions explaining how the traffic light works and containing tips on correct ventilation, the HKA aims to raise awareness of the issue of energy saving and climate protection throughout the university and actively encourage support for the project.