Washable Pre-Filter The pre-filter is a washable coarse particle filter that collects the larger particles from the air flowing through it. This process additionally protects the HEPA filter element from these particles and thus increases the service life of the following filter elements. HEPA Filter The ‘High-Efficiency Particulate Air’ filter removes 99.9% of particles in the air including PM 2.5, pet allergens, pollen, viruses, mould and bacteria by trapping them inside the filter material. Activated Carbon Filter An activated carbon filter has a huge surface area that removes volatile organic compounds (VOCs), odours and other gaseous pollutants from the air by trapping the gas molecules in the charcoal. Cold Catalyst Filter The cold catalyst filter speeds up the decomposition of organic compounds in the air, breaking them into molecules such as H2O and CO2, which are harmless to the human body. Ultraviolet Light Ultraviolet light technology can be used as a disinfection method using short wavelength ultraviolet light to inactivate bacteria and viruses sanitising the air around you. Certain UV lights kill bacteria or microbes by damaging their DNA, meaning the bacteria cannot replicate and therefore is unable to cause infection.