Breathe in clean, fresh air with the Blueair Blue Pure 511i Max air purifier. Its HEPASilent dual filtration system captures at least 99.97% of airborne particles as small as 0.1 microns. Its intuitive display, five-colour AQI, and two-button design allow for easy control. This air purifier operates as low as 19dB and never exceeds 48dB. | Blueair Blue Pure 511i Max Air Purifier with HEPASilent Filter - White