I purchased MistAire ultrasonic cool mist humidifier to help me at night. I found that it provided the service it was intended to give. The air in my room is not dry anymore. I am able to breathe better at night. I strongly recommend to anyone who is experiencing dry air during the night and need moisture in their room to purchase the MIstAire ultrasonic cool mist humidifier. User's recommendation: MistAire ultrasonic is cool mist humidifier is an excellent product to own.