On 9/1/2009 8:10 AM Jean-David Beyer spake thus:

Maciej Zielenkieiwcz wrote:

After that you can drill a hole in it, to which you attach a pipe.
Choose a size which will accomodate a standard kithen ventilator.
Buy a U-shaped pipe (probably you'd have to assemble it from
pieces) and paint inner surfaces black. Also paint fan blades.

The fan should be installed to blow air out of the room,

Not really. You should blow air into the room through an air filter
to remove dust entering the room. If you blow the air out of the
room, the room will be at a partial vacuum and dust will get in from
every leak.

Agreed. Positive ventilation is what a guy would want here. All air that
enters the room is filtered.


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Found--the gene that causes belief in genetic determinism