I updated my vent system from just an overhead hood (see my old studio) to include a system I learned about from Andrea Guarino. I have a fan installed on the outside, with a flex tube connected to the overhead fan. I get twice the ventilation and lots of light.
The Nortel Minor is a duel fuel torch: propane and oxygen. My propane tank sits outside of my studio in a ventilated deck box to protect it from the weather. My hoses run through the wall and attach with a quick switch connector to my fuel regulator. I disconnect this when I am finished torching.