Design Centrifugal Blower

As to parameters:

Flow rate, pressure rise, power, rpm, diameter, length (or width);
blade type (radial or backward/forward curved); space and noise limitations;
choices of construction materials; other things I forgot; etc.

No you cannot. It has been designed, maufactured and installed in thousands.

Do you have any experience designing blowers?

Do you know the names of any blower manufacturers.

Which do you think is best?

Paxton, or Sonic Aire? And why? Please answer in detail.