Classroom air changes as soon as pupils arrive. As everyone breathes out carbon dioxide (CO₂), its concentration can rise if ventilation does not bring in enough fresh air. How quickly this happens depends on the number of people, room size and ventilation. Monitoring classroom CO₂ throughout a lesson helps reveal changes that might otherwise go unnoticed.
Follow classroom CO₂ from start to finish
Check the CO₂ level before pupils enter, then follow it during teaching. Does it settle, or keep climbing towards the end of the lesson? During the break, see how quickly it falls as people leave and the room is ventilated.
Compare several lessons to spot recurring patterns. A room that starts the morning well ventilated may behave differently when classes follow one another with short breaks. CO₂ is a useful indicator of ventilation in occupied classrooms, although it does not describe every aspect of air quality.
Monitor classroom air with Ruuvi Air and Gateway
Ruuvi Air measures CO₂ alongside particulate matter, temperature, humidity and other indoor air parameters. You can follow the readings and history graphs in Ruuvi Station.
Adding an internet-connected Ruuvi Gateway sends measurements to Ruuvi Cloud, allowing school staff to check classroom conditions remotely. With a Ruuvi Cloud plan that includes measurement history, teachers and facilities teams can review what happened during a lesson without keeping a phone nearby to collect readings.
Use the readings to guide classroom ventilation
Place Ruuvi Air where it can measure representative room air, away from open windows, ventilation outlets and someone’s direct breath.
If CO₂ repeatedly builds up during lessons, review ventilation with the facilities team. Where appropriate, airing the room during breaks can help. Follow the measurements afterwards to see whether the change makes a difference before the next class arrives.