Air Purifier - Will this work?

[Bob Thomas]

http://www.amazon.com/Delta-AP200-Sh...6510352&sr=1-5

I've got the lathe setup in my garage. It's a rather large garage fitting 2 vehicles and a nice sized working area and about a 10' ceiling. I've seen too much dust getting around the area and in the air and wanted to try to cut it down.

Will the above system be alright or am I just spending money on something that won't work? Currently, I use my shopvac when turning to suck the chips etc. up but still see a lot of airborn dust. Wanted to cut that down by hanging this over the lathe.

Searched but I kind of have a unique situation where the garage is so big that I'm afraid it won't be effective?

Thanks
Bob