Which Air Purifiers Don't Lose CFD After 6 Months?

CFD (Cubic Feet per Minute) degradation is the silent killer of air purifiers. We analyzed thread sentiment and user-reported sensor data to find the models that retain their efficiency.

The Filter Factor

Most purifiers fail not because of the fan, but due to proprietary filter geometry that chokes airflow prematurely. Standardized HEPA dimensions perform much better over the long run.