Breathe cleaner air with a filter that helps eliminate common pet odours | In addition to common household allergens and pollutants, this filter drum captures up to 99.97% of airborne pet dander | Compatible with all TruSens Small Air Purifiers | This combination filter has 3 levels of filtration formulated specifically to combat pet odours and dander | All-in-one filter system combines a True HEPA filter with an activated carbon filter and a separate washable prefilter | 360 degree filtration draws in air from all directions, collecting pollutants from around the room | The filter is at the core of purifying your air and replacement is essential for your purifier to perform at its best | Replace every 12 - 15 months and replace the Pet Carbon Filter every 3 - 4 months (depending on usage) | Change indicator glows red on your air purifier when the filter needs to be replaced | Compatible with all TruSens Small Air Purifiers