On Wed, 17 Mar 2010 14:32:14 -0700 (PDT), mike
wrote:

I was thinking it should be easy to find some $40 fan/pump that would
deliver low-pressure air from a clean air location, via hose, to a
mask.

Not so. They all seem to want many hundreds of dollars.

What gives?

Maybe because it's somewhat "medical" it has all kinds of insurance
problems.

My suggestion: Duct tape.

Or just get a mask you like, a hose you like, a fan you think will
work, and tape them together or attach them somehow. Then when you
kill yourself you can sue yourself.

I'm not asking suck air through a garden hose, but this
doesn't seem like a big feat of engineering. I don't even need HEPA
filters.