Ionic Air Purifier PM 100 helps to remove pollutants, allergens and germs from the air right down to the sub-micron level (less than 0.015 microns). The silent and filter-less unit is effective at removing airborne viruses, bacteria, mould spores, fumes, odours, cigarette smoke, dust, and pollen all without a fan or a filter. Unit floods the air with negative ions that help people feel better and stay alert.