@Alvis Ciritis same. We have a couple of big fans. We do a few basements and commercial offices. Most of the time dust control is good - hand grinding corners can get real dusty. I've had some people tell me air scrubbers don't do alot - but I like things clean and sometimes assume that person might not have the same expectations of clean as me - haha. I think I'm going to buy one and see for myself.