Have a 150 installed in a 14 foot trailer certified kitchen without a hood. Vented directly to the outside through the roof using 3/4 inch conduit and through the ceiling. This works great for us. By the way we do not have a problem with smoke escaping around the edges of the door. The only problem is the probe which is normally dropped into the cooking cavity through the smoke exhaust port. We are contemplating drilling a second hole in the top of the cooker similar to the present smoke port to put the probe wire through. We would run the probe wire through a rubber stopper which would surround the wire and plug into the top of the new port so as to keep smoke from excaping at that point. Keep stokin and smokin.