http://www.arizonavortex.com/ is the link BTW.
EDIT : Noticed that the site advertises these things as "quiet", which makes me wonder what sort of crack they are smoking. I've seen one in real life and it's kinda like the sound out of a air compressor (which it is), but a lot louder (which is also is), they advertise air moving at over 25 times faster than the air coming out of the compressor.