Dash has mentioned Fantech as making duct booster fans which would really do something, so that brings to mind... can Dash or anyone say what might be an application where such a fan is really justified? Do you ever regard it as a legitimate part of a central forced-air system?

Not that I have any specific problem at this time. I know this question is vague, but if it is possible to give a generalized answer I sure would appreciate it.

Thanks -- Pstu