Gently used, great working conditiuon, this Honeywell is the #1 recommended air purifier and Doctor's Choice #1 brand recommended by allergists that helps capture up to 99.97% of microscopic allergens from the air that passes through the filter. The SurroundSeal Technology minimizes air leaks and ensures that the air passes through the Activated Caron Pre-filter that helps reduce odors. It can help remove particles like pet dander, pollen, dust, and smoke. It can also help reduce certain bacteria, mold spores and viruses. Recommended for large & extra-large rooms (465 sq. feet). It helps capture certain airborne germs such as bacteria and virus. It features a carbon pre-filter that prolongs the filter life by removing large particles before they can enter the filter and helps reduce common odors. It utilizes a 360° air intake and output that maximizes efficiency in filtering and circulating the surrounding air in a room.