Suitable for room size up to 86m²App controlled Quiet noise level4 Speed settings99.97% filteration rate Meet the new Blue series with HEPA Silent performance, now even better; up to 83% faster cleaning and 50% less noise. Unique HEPA Silent dual filtration technology removes at least 99.97% of particles down to 0.1 microns. Blue 3350i purifies up to 86m2 space in 30min or 36m2 in about 12.5min on high. Blueair air purifiers are whisper-quiet and use less energy than a light bulb. Seamlessly connect to the Blueair app for scheduling, pollution monitoring and more. The stylish grey washable pre-filter removes the largest particles.