This air purifier by Honeywell captures 99 % of fine airborne particles such as dust, pollen, smoke and pet dander. Manuel control provides three air cleaning levels, and the unit is also equipped with an electric filter change reminder for the dual action HEPA type filter with activated carbon pre-filter layer to help reduce odours. HEPA type filter lasts 4 months. Small but powerful, this air purifier is ideal for small rooms (85 sq. ft.) and it is covered by a 3-year limited warranty.