Open a window in another room to feed air into the building room.
If you layout the table right, the fumes and dust will go out the fan.
I had planned on doing this, but I'm worried about how much dust this will actually catch...the trick here is that there are other things in the room (namely computers) The girlfriend would scream bloody murder if I tried to take over the guest bedroom.
I'm thinking about hanging up some plastic sheeting to set aside a little 'corner' that includes the window, but not sure how effective this will be either.