On 03/07/2011 18:53, Dave Plowman (News) wrote:
Why not simply have a filtered air circulation system. That would cut down
on the dust to very small levels.

Probably not. Most of the dust is produced by us (it's bits of skin) so
unless you move the air fast enough to blow all the dust around to where
it can be filtered - which would probably be uncomfortable and noisy -
filtering won't help.

Andy