I’m using a 11” Honeywell turbo fan from the hardware store to exhaust. If you buy a styrofoam minnow bucket it fits right over the top of the fan. Tape it on cut, a hole on the bottom to fit my 4” duct running straight out the top of the box. I currently don’t have a filter on it but have been looking into some DIY stuff. Really not much smell yet. And it’s in a back room I don’t have to worry much about. But will definitely incorporate something before the end of the grow. When I get home I will snap a few pics of my exhaust setup. As far as training goes I topped at 4th node and have been laying them down as much as I possibly can the entire grow. I was gonna build a net but would’ve been to difficult to water. I begged for 5 weeks before I flipped. I have two different sized pots. One is a 2.5 gallon round pot and the other is a small shoebox tote that holds around the same amount of soil but is about 4” shorter. Seems there is no difference in growth rate between the two so if your fighting your ceiling maybe something to look into. Oh and intake is a 4” hole in the door with a piece of duct in a “U” shape to help light from escaping