Unlike conventional filtration-based air purifiers, these purifiers work immediately and do not require capture or exposure time. They work by rapidly and continuously filling a room with virus-neutralizing particles to instantly break viruses down to their component parts, eliminating them on contact. The technology was originally developed by NASA for use in the International Space Station and is the only Certified Space Technology in the world in its class. These units are continuing to be installed in school spaces as a means of proper ventilation.