Anybody knows any simple tech or household design that would minimize dust from entering homes?
I mean, other then the standard "air filters", which I doubt will really work if your room is continuously exposed to the outside environment.
Insulate your house properly. Make sure all the little crevices and gaps are taped. Starting with the front door, fan housings, etc. etc. Then have the windows open as little as possible and use air conditioning most of the time. Not ideal, but dust is really bad for a person health wise.
Have only one air intake to the house, filter that, and have that intake always being forced in by a powerful fan.
All the remaining cracks and crevices in the house will then always be blowing air out, so they can't carry anything in.
--A solution copied from anti-chem/bio-weapons techniques. Very effective and much cheaper and easier than trying to hermetically seal your entire house.
Of course, that won't stop dust from sources inside the house though.
And unless you use a very powerful fan, it won't work if you leave doors or windows open very long.
humidifiers can help, although they cannot eliminate dust, they can reduce it to a certain level. by bounding dust particles with water vapor and letting gravity pull them to the floor, you can experience significant change in air quality. But I have to agree with ocalhoun, its a one stop shop with positive pressure systems.