OZN-JR Ozone Generator Ionizer Air Cleaner Negative Ion... cheap and small product now what you can do with the exhaust ducting is nothing since this ozone gen doesnt use one. but what you can do is. on the top roof of the cabinet is drill a hole with a fan blowing towards it so you have your exhaust. but i would recommend cutting a hole on the bottom with a fan blowing towards the bottom hole so you have fresh air intake and waste air outtake.... now what you will understand is that doing the holes for the air going in and out are called your intake/exhaust vents now since you will have a 2 floor set up you will need to drill a hole on the 2nd floor so the fresh air will go into the second camber with a fan in that area also blowing up towards the second floor hole. and when you make a hole dont make a 2 inch hole make it around like 4inchs and have a small fan blowing into it because really you dont need a gaint fan/ozone gen for your small set up. like my idea?