Electrolux PA91-406 Used for 2 years. The filter has been replaced once. I think it can still be used if the filter is replaced. I will clean it as much as possible before shipping, but I can't disassemble the main unit, so some dust may remain. If you are concerned, please refrain from purchasing. - Applicable floor area is approximately 37 tatami mats (approx. 646 sq ft) - Everything in the photos is included.