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Thanks all. I think CFM is NOT what I'm looking for - which most indor fans use for comparison. Ddawg, could you recommend a manufacturer or two so I can start my search? What about a home condenser fan unit? Those seem quiet enough, and put out a nice amount of air with good speed.

Anyone have recommendations on books I can read that explains the differences between things like CFM PSI MPH Velocity and Static Pressure? I have a project I'm working on that I need forceful air (think leafblower) for a lottery type drawing machine that uses air to circulate ping pong...