Here's a web site describing this ingenious device:
http://www.geocities.com/MotorCity/2951/air_supply.html
Steve Genotte
Thom Besch wrote:
> In a recent Experimentor (EAA) magazine a member from our local
> chapter here in Washington demonstrated a very effecive forced air
> system using a mask with the filters removed, a plastic drainage hose
> (about 1.5 inches, $12 US for 25 feet), and a squirrel cage from a
> bathroom fan. He uses it often an says it works even with his beard
> (a standard mask would never seal, but this has enough overpressure).
> He hangs the motor on a board which he puts outside his window, thu8s
> he gets fresh air. And yes, he recommends a filter over hte intake to
> keep out the bugs.
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