Oreck WK15500B Air Refresh 2-in-1 Hepa Air Purifier & Ultrasonic Humidifier for Small Rooms, 2 products in 1 which allows you to Purifier and humidify the air at the same time, or turn the humidifier off, it's up to you 2-stage filtration combines a HEPA media filter to capture 99 percent of dust and allergens and a charcoal filter to remove odors from the air Ultrasonic humidification releases a cool mist to safely add essential moisture to dry air without using hot steam Optimal clean air perfect for small rooms, such as bedrooms, dens, or nurseries Silence technology cleans and humidifies the air without the noise