-oh hey i forgot to say. I disconnected the ducting that leads to the room, so it goes into the box where the cover was removed and then up into the attice where i disconnected the duct from the top of the box. Get it?

About the smell, test venting into the grow room for a few minutes just to see how good the smell removed. My take 100% out. When the filter is on, you can be in the same room and blindfolded wouldn't know there were plants.