Monitoring and Management of Air Quality in School Spaces
The Issue of CO2 as an Indicator of Air Quality in Classrooms
The quality of the indoor environment in school buildings is a crucial factor influencing the cognitive performance and health of students and teachers. The concentration of carbon dioxide (CO2) serves as a primary indicator of air quality due to its precise measurability and correlation with other pollutants.
WHITE LED
– excellent air quality,
comfortable environment
for concentration
GREEN LED
– good air quality
ORANGE LED – poor air quality, need to ventilate, possible discomfort associated with stale air.
Specifications of the NLII-CO2-R-5-A Sensor for School Environment
The NLII-CO2-R-5-A sensor represents a comprehensive solution for monitoring and automating ventilation in school spaces:
Technical Properties
Acoustic signaling: gentle non-intrusive alert when limit values are exceeded
Output interface: compatible with most ventilation systems (0-10 V)
Ability to control window or skylight actuators
Power supply voltage: 12 V to 24 V AC/DC
Lifetime: at least 10 years without the need for calibration
Maintenance-free operation throughout its lifetime
Protronix air quality sensors have a three-stage optical indication, the so-called “TRAFFIC LIGHT” — three LED indicators that clearly indicate the current air quality: LEARN MORE
Effectiveness of Ventilation Management Based on CO₂
A properly implemented monitoring and ventilation management system ensures:
Maintaining CO₂ concentration below 1500 ppm
Optimization of energy costs for heating and ventilation
Automation of ventilation without the need for manual intervention
Proven improvement in cognitive functions and reduction of fatigue
Protronix sensors are fully compatible with 99% of ventilation and recovery units on the market, allowing for seamless integration into existing and newly built HVAC systems in educational facilities.
Key Findings from Our CO₂ Measurements in Classrooms
\nWe installed carbon dioxide sensors in many classrooms at various schools across the Czech Republic. Our measurements led to a relatively simple conclusion: in poorly ventilated classrooms, the CO₂ concentration rises to unacceptable levels in the vast majority of cases already during the first lesson (sometimes even after the first half hour of teaching) right on Monday morning. And this can reach values between 3,500 and 4,000 ppm.
