Ultrafine particles are smaller than 0.1 microns, make up about 90% of all airborne particles, and have been linked to heart attacks, strokes, asthma, respiratory diseases, and even cancer. IQAir’s HyperHEPA filtration in the GC MultiGas filters 95% of all particles down to 0.003 microns – as small as the smallest virus. Filters allergens, bacteria, and viruses like SARS-CoV-2, the virus responsible for COVID-19. Removes airborne particles and traps them on filter materials – where they can’t escape.