The Boneco W200 air washer offers year-round humidification and air purification in areas up to 540 square feet in size. It features a 3-dimmensional evaporator mat that turns through the water basin, picking up water that evaporates and adds moisture into the air. The air will only draw in as much moisture as it needs, ensuring your space is properly humidified. The W200 also provides relief for allergy sufferers because the water acts as a natural filter, cleaning the air of allergens like pollen and dust. The W200 air washer is easy to operate, provides natural humidification and it will look great in your home as well.