Are the air purifier filters washable and reusable?

No. Once the filters reach their capacity, they will need to be replaced. They are not washable, either. On average, the filters have a lifespan of 3,000 operating hours. Once it reaches this limit, an alert light will illuminate, indicating that the filters need to be replaced. If you live in a heavily polluted or particularly dusty or smoky environment, then consider replacing the filters sooner.