If you are not doing a lot of printing then filtering isn't an issue, just use common sense and provide fresh air to the room. Still I wouldn't use the printer in a room with a child or pets and not in one where there isn't adequate ventilation. The fumes that ABS produces are more like a gas not a particle. Charcoal will remove the smell but charcoal doesn't last forever and just because the smell is gone it doesn't mean you have removed the toxin.

If you are doing a lot of ABS printing then vent the printer to outside. You can put together a vent using dryer vent parts and install it in an existing window, add some dryer vent pipe, then just add a standard 120mm pc fan and you are set. The dryer vent closes to the outside when not in use . No filtering and it is quiet.