IONISAN uses a volume cold plasma technique to clean the air from viruses, bacteria, fungal spores and odors. The basic principle is the permanent release of positive and negative ions. With this process the microbes bacteria fungal spores are completely destroyed. In addition, the release of negative ions cleans the air (like after a thunderstorm). This makes the indoor air is even better than the outdoor air. Small negative ions create a vitalizing effect of healthy and pure air, like we find near a waterfall. All IONISAN units are maintenance-free (no filter replacement) and do not emit any chemical substances such as ozone.