"Ken Yee" wrote in message
. 47.166...

The intended use for now is to create negative pressure in a room to
get rid of construction dust, but it should be useful for future
woodworking projects..

I've worked in a P3 suite and that was setup for negative pressure. Didn't
want the nasty things floating out...

I think you want what's essentially a blower - since you'll need to vent the
exhaust outside.
If that's your approach - you're just buying the unit for it's blower, then
it's worth a shot.

But would you mount the whole unit outside and drag the 4" piping inside?
Have you thought about a slew of box window fans directed outward?

Another approach might be to circulate the snot out'a the air in the room -
and get it into a cleaner before it could leak out.