That sounds pretty good, to work with standard round ducting you will probably want to use some sort of transition from the square/rectangle shaped outlet of the squirrel cage fan to the ducting.

Ex: fan has a 4.5" square outlet, need to fabricate joint for tight airflow.

Sounds like a nice fan, might be a loud one though could even build a baffle/muffler box for it.
:woohoo: