Vicks V5100NS Ultrasonic Cool Mist Humidifier Vicks V5100NS Ultrasonic Cool Mist Humidifier. Vicks V5100NS Ultrasonic Cool Mist Humidifier. The Vicks V5100N Ultrasonic Cool Mist Humidifier provides a superfine visible cool mist, which restores moisture to dry indoor air for healthy and comfortable living. It features quiet ultrasonic technology that averages 95 percent quieter than other humidifiers. Water is atomized by ultrasonic sound waves and propelled into the air by a small fan. These ultrasonic pulses are silent and produce a visible mist, which makes it perfect for the bedroom.