In the past ive used only squirrel cage fans for cooling and they worked incredicble. ive used both the large Dayton Blowers which move i think about 465cfm they retail for about $70 at your local electrical supply warehouse. I also used the Hydrofarm squirrel cage fan rated i think at 470cfm retail about $140. The hydrofarm was so much quieter than the dayton blower but twice the price.....also the dayton blower seemed to move more air than the hydrofarm, despite the lower cfm number....You can always muffle the dayton blower by enclosing it in a square air duct box....this was about 6 years ago.....now everyone raves about vortex fans(which i think on my next larger application i will move to)

PS.....Always go for the larger fan for $20 more and buy a fan controller to adjust air flow and noise. Good Luck
Killa12345