I would be interested in this if it's effective as well. A vortex fan, speed control, venting and carbon can is comparable in price if you go with name brands etc. anyway.

I priced out a 6 inch vortex at $149.90, 6 inch can filter at $115.00, speed control at $25, ducting/hardware another $20.. $309.90 total. Now I could cut that down to a 4 inch setup and reduce it $50 or so, but still comparable price to the Vaportek Optimum 4000 at $214.95.