Best performing air purifier brand¹; Unique filtration technology while using less energy and less noiseExtra-large rooms; Filters the air at industry-recommended rate of 4.8x an hour (every 12.5 minutes at 620 ft²) to effectively lower and maintain particle levelsCombination filter; Activated carbon removes odor and gas; filtration technology removes 99.97% of particles, like pollen, dust, and virusesCustomize freely; change your pre-filter in seconds, includes colors Dark Shadow and Diva Blue; machine-washable, additional colors sold separatelySleep without disruption with a noise-level equivalent to a whisper on the lowest speed (32 dB) and rainfall on the highest setting (56 dB)Most independent certifications²; Blueair is the only major brand to verify 100% of models with AHAM for performance, ENERGY STAR, and safe ozoneFreely place your air purifier anywhere in the room without compromising performance with the large 360° air intake