Dave & Hood, funny thing doing posts after midnight.... gives you time to think a little (note to self, do before opening keyboard... [or mouth])
Dave, 3200m³/hr = 889 l/sec, & yup that is an axial fan.
Problem with axial fans is they have very little pressure displacement across the fan as said above, and manufacturers like to quote airflow numbers with the fan tested without any ductwork on it / or induced pressure loss (free air displacement).... hence when looking at a fan curve such as the one below, you can see that some manufacturers will choose the point of most airflow at zero pascals of pressure displacement at the far right of the curves (in day job be very suspicious of any fan manufacturer not publishing a fan curve for a fan but just quoting one number without a corresponding pressure displacement).
http://www.cibsejournal.com/wp-content/themes/cibsejournal/images/2011-12/images/figure-1.pngIf you are adding ductwork on to it (flexible / ridgid) you need to consider the pressure loss (even roughly), and also the termination (louve, or even free air discharge), and also the intake.
(I'll try to do this over a few posts, if anyone is interested)