How often should FFU filters be replaced?

The frequency of replacing FFU (Fan Filter Unit) filters depends on various factors such as the environment in which the FFU is operating, the level of contamination present, and the manufacturer's recommendations. However, a general guideline is to replace FFU filters once every 6 to 12 months.

In cleanroom environments where high levels of cleanliness are required, the filters may need to be replaced more frequently, even as often as every 3 to 6 months. This is because the filters can become clogged and less efficient over time, affecting the performance of the FFU in terms of air filtration and airflow.

To determine the optimal replacement interval, it is recommended to monitor the pressure drop across the FFU filters regularly. A significant increase in pressure drop indicates that the filters are becoming clogged and may need to be replaced.

Additionally, some FFU filters come with pressure gauges that can indicate when the filters should be replaced. These gauges provide a visual indication of the filter's condition by showing whether it is still within the acceptable pressure drop range or if it has exceeded the limit.