A Camfil CITY M Portable Air Purifier HEPA 14 Filtration System - This is one of 3 we have been using in our warehouse. It is used, but we have purchased a brand new set of filters and fitted them ready to go. It could still do with a bit of an overall clean, but the filters themselves are brand new.
In the photos you can see the couple of examples we have. The have a couple of dings but are perfectly good for warehouse, garage, storage use. We even have one in our home!