Air Filter

I ended up buying the Honeywell Air Filter:

Honeywell Filter

I have been very happy with the filter. It is very loud, but that is alright. I keep it in with the birds in their sleeping cages. The dust in that room was incredible, so I couldn't imagine that it was very good for them to breathe. It has a double bonus. Since it is pretty loud, they don't ever scream for me to get them out in the morning because they can't hear me moving around. This wasn't a huge problem or anything, still, it is nice to be able to get up in the morning and do morning activities for a few minutes before they begin asking to be let out.

Anyway, if you have a parrot, I would highly recommend this filter based on a few weeks use. Maybe my opinion will change with time, but I'll post an update in six months or so.