Be mounted on the wall, the humidifier generates sterile steam for humidification. It has an inside blower to send steam into the air. it is suitable to house, laboratory, meeting room, hospital, etc. easy to install and use, low maintainance is needed. Suitable for the space of 2500-4000 sq.feet room. Power Supply is AC 200-230V, 50-60hz. It uses normal tap water, don"t need any water treatment device.