Grainger sells a wide variety of ventilators: wall/roof mounted, upblast or downblast, centrifugal or axial fan, direct drive/belt drive and a variety of duct sizes, horsepower, CFM, and voltage ratings.
Go to the website and search "wall ventilators" or "roof ventilators"
Yeah - I've looked at them. They'll make your head spin there's so many. That's why I was hoping someone that knows their stuff here can narrow it down for me. I doubt I'll find a fan expert if I call Grainger. They are jack of all trades, experts of none.
