Maybe doesn't do what you might expect.
I bought this unit and have been using it for about 4 months now.  This unit does remove visible smoke.  However, it only helps a little bit with actual smell.  It's nice to not walk into a smokey shop, but the smell is still fairly strong.  Also, invisible particles are probably still in the air, because my eyes still get irritated.  So, if you are planning on using this filter inside a living space, you will probably be dissappointed.
Rating: 3 stars