The Blueair Humidifier rapidly provides humidification up to 500 sqft. Designed to create more comfortable sleep air through an easier, cleaner humidification experience. This humidifier uses cutting-edge InvisibleMist Technology, a technology that delivers up to 48 hours of clean moisture by first trapping water impurities within our anti-microbial coated wick, then releases pure water vapor into the air. No more stickiness, water residue or white dust - only pure water vapor released into the air without the mist. With the UV-powered water pump that recirculates water, the risk of bacteria growth in the water is heavily reduced. Easy maintenance with two ways to refill and an easy clean tank, which has a large opening for no hard-to-reach spots, or is dishwasher safe for a deeper clean of the unit. Achieve better sleep with the highly rated Blueair app, as the AutoHydrate feature uses sensors to monitor and adjust your specific environment. Want it to run through the night? Activate night mode for continuous, quiet humidification that works throughout the night for uninterrupted sleep.