... .The Air Cleaning Stages: 1st stage starts with Cotton filtering effect early.2nd stage is an Mini-HEPA Filter3rd stage ... , Auto, Bedroom, Living room, Cookroom, Hospital, Etc..·Filters: Cotton filtering effect early, HEPA Filter, Activated Carbon and Photocatalytic.·UV: 254nm ... 8 to 10 Years).·Filters Life: Depending upon usage, Cotton filtering, HEPA and Carbon: 3 to 6 months, Photocatalytic: 12 ...