Bosch Air Purifier replacement filters are easy to change. When used as directed, with moderate air quality, expect to change the filter every 6-9 months. From large allergenic particles to smoke and volatile organic compounds breathe easy knowing that your air is being filtered by Bosch. The perfect air purifier for homes and offices. Using an all-in-one filter, Bosch Air 6000 is designed to remove over 99% of particles in the air such as: Pollen, Smoke, Dust, Dander, Outdoor Pollution, and Odors. Breathe easy knowing that your air is being filtered by Bosch.