When opening windows may not help

Balance outdoor conditions, indoor sources and building safety requirements.

Key points

Ventilation dilutes indoor sources but can also introduce outdoor pollution.

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