A consumer reading is not a reference measurement

Trends recorded in comparable conditions are often more useful than one isolated number.

Key points

Temperature, humidity, ageing and placement can influence low-cost sensors.

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