Before I go buy a handful of some company's fan driven smoke units, are there smoke units intended for factory smoke stacks? I'm modelling the steel industry and intend to create smoke stacks for the blast furnace, open hearth, Bessemer converter (if I model it), boiler house, and blower house. There are other small industries that could use exhaust but the mill is my main focus. I already have a fume hood installed at the basement work bench so I intend to tap into that to prevent the smoke from getting out of hand.
I initially thought maybe using a fog machine would be a more efficient route. I haven't abandoned that. I just thought I would ask in case somebody has been down this road before.