This chemical and corrosive resistant inline centrifugal fan up blast discharge has a performance capability of .3" to 8.75" static pressure and 235 to 2590 CFM.  The integrated polypropylene weather hood with drain plug and disconnect switch is a great installation package with the curb size being the same for all three models.  Can be roof mounted or wall mounted.  As in every Plastec product, the motor is outside of the airstream ensuring no corrosive gases can harm your investment.  Applications include but not limited to water parks, natatoriums, fume hoods, fume capture arms, marine and other salty environments. Hindered-Amine Light Stabilizers (HALS) for increase UV resistance.