I am making a relatively small spray booth which will incorporate a 3 phase 12” tubeaxial fan. I want the fan to be variable speed so I can dial in the CFM of the booth.
The fan will have a 3/4 hp motor belt drive motor so i think I’ll only need a 1hp VFD.
Any recommendations on an industrial quality VFD? The VFD will be mounted on the shop-side of the booth so will I need a NEMA 4 rating which I guess means a more dust proof enclosure?
Do all VFD’s make a piercing whining sound? Steve Rowe has a video on his Extreme Woodworker channel regarding 3 phase options. He shows a VFD powering a 3 phase disc sander. But the noise it makes would drive me crazy.

Last question? I have 3 phase power in my shop. Is there such thing as a 3 phase to 3 phase variable speed controller?

Thanks