CO2 as a ventilation proxy

A CO2 reading does not measure every pollutant and is not a medical diagnosis.

Key points

Use CO2 trends to learn about ventilation in an occupied room while recognising sensor limitations.

How to use this in practice

Measure the room and record the operating conditions first. Compare values at the same speed and under similar conditions. A marketed room area is not universal; volume and target airflow are more transparent.

Limitations

Outdoor conditions, building leakage, open doors, ongoing sources and furniture layout can materially change performance.

Related tools

CADR · ACH · Log