Filter for Sensibo Pure Three-layer filtration HEPA and carbon filter The pure filtration system of Sensibo consists of a three-layer filter technology that includes a pre-filter, an advanced HEPA filter, and an activated carbon filter. Sensibo Pure features the most advanced filter technology, allowing particles as small as 0.1 micrometers (more than 100 times thinner than a human hair) to be filtered out by the HEPA filter of Sensibo Pure. This includes pollutants such as bacteria and viruses, as well as fine dust PM1.0, PM2.5, and PM10. Additionally, the activated carbon filter absorbs harmful gas atoms such as smoke and volatile organic compounds (VOCs). The filter is capable of removing unpleasant odors through the carbon filter, which captures odor molecules through a process known as absorption. This system allows molecules to adhere to the surface rather than being soaked into it. When is the right time to change the filter? On average, 6 months is the right time to replace your Pure filters. However, not all homes are the same, which is why Sensibo Pure has utilized a special algorithm that analyzes the levels of indoor and outdoor pollution in your home, usage patterns, and other parameters to calculate the optimal replacement frequency for you.