CADR: what it means and what it does not

CADR is most useful when compared with room volume and a target air-change rate.

Key points

Learn how clean air delivery rate differs from fan airflow and advertised room area.

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