Fellowes AeraMax SE Air Purifier Fellowes AeraMax air purifier technology is specifically designed to effectively purify indoor air and remove harmful allergens and pollutants. Just turn them on and leave them to clean the air automatically - 24 hours a day! - Purpose: recommended for rooms with an area of ??up to 50 m 2 , it provides 5 air changes per hour (for a room height of 2.4 m); for rooms up to 80m 2 it provides 3 air exchanges - HEPA H13 filtration: removes up to 99.95% of particles as small as 0.1 microns, including allergens such as pollen, dust and pet dander - Elimination of unpleasant odors: pre-filter removes visible airborne particles, carbon filter actively removes odors and volatile organic compounds ? - Detection and adjustment: sensors monitor the air quality and automatically adjust the purification speed to keep the air always clean