Guides ยท Science
Air Quality Monitoring Basics
Track indoor air quality with simple sensors
This guide shows how to choose affordable sensors, place them correctly, read the numbers, and respond with ventilation, filtration, or source control.
- air quality
- co2
- pm2.5
- voc
- ventilation
Pick key metrics
Start with CO2 for ventilation, PM2.5 for particulates, and humidity; add VOC sensors if needed.
Place sensors well
Keep monitors at breathing height, away from windows and direct vents, and log readings over time.
Interpret thresholds
Aim for CO2 under ~1000 ppm, PM2.5 under 12 ?g/m? daily average, humidity 40-60%.
Act on data
Open windows, run exhaust fans, use HEPA filters, and reduce pollutant sources like candles or sprays.