Ozone generator or one of those Ionic Breeze gadgets could help you out.
stinkyattic Reviewed by stinkyattic on . Odor Problem Looking for an odor fixer for a room 5x8 room, but with no ventilation besides keeping the door open during "daylight". This unfortunately makes the rest of the house smell, but there's no way to install ventilation. Probably a lost cause, I know :P Rating: 5