Allergies acting up? That could be a sign that your air purifier isn’t working at full speed.

Check the assembly for any dust or dirt in the pre-filter after cleaning it. If you don’t see anything obvious that could be causing a problem, that may be a sign that there’s a more significant issue with your air purifier. For a clearer understanding of its effectiveness, you may need an air quality monitor.

The lifespan of an the filters varies, depending on where you live and the frequency of use. In reality, there is no “one size fits all” when it comes to knowing when to replace an air purifier.