HEPA is an acronym for 'High-Efficiency Particulate Air' filter. These filters are made of submicron fiberglass and recognised as the best type of air filters worldwide. HEPA-based filtration systems are used for cleaning the air in hospitals and hazardous industrial facilities Traps up to 99.9% of very fine particles, including bacteria and allergens Removes formaldehyde, tobacco smoke and smog. Effective in eliminating unpleasant odours UV disinfection is the final step in air purification. A beam of ultraviolet light additionally kills bacteria, mould and fungi. The UV lamp is fitted inside the purifier and does not harm your health.