I recommend the  MILIN LED Germ-Free Air Vaporizer Humidifier as the best antimicrobial humidifier. In this model, you will get an amazing sterilization technology that kills all the air-borne germs and bacteria to give you clean air for breathing. This humidifier also gives you the longest run-time of 40 hours, a large capacity tank of 4L, an auto shut-off option, and silent operation while working. Therefore, it is the best antimicrobial model that provides germ-free mist and a comfortable atmosphere.