I've had a number of air purifiers over the years and the one we have now has been the best - Nature's Air Purification - and does help with airborne dust particles. I had the least amount of dust in our house when we had NO wall-to-wall carpets and now we are in a new home and have ALL wall-to-wall carpets. I think carpets are the biggest culprit for much of the "dust" in our home, even though I vacuum 3X a week (2 adults and no pets). Have you tried installing a quality electrostatic air filter, or a high-quality pleated filter, on your furnace? We keep the fan of our central heat/air conditioner unit on constantly, and this helps remove a lot of the dust. Plus we clean (or change) the filter once a month. You may also benefit from having your air ducts cleaned, but nothing will completely eliminate dust because there are so many things constantly contributing to it. Since it's impossible to eliminate, I'm hoping we at least reach the point of equilibrium where we are tracking as much dust OUT of the house, as we are bringing in (LOL). -Grainlady

andry: You might want to read this article on filtration. Be careful about your choices. There is a lot of confusion on air cleaning and the usefulness of it.....in some cases a waste of money. Use this link: http://www.epa.gov/iaq/pdfs/residential_air_cleaners.pdf and this one: http://www.epa.gov/iaq/pubs/airclean.html This post was edited by audiomixer on Fri, Feb 8, 13 at 0:42

We are constantly DIY and I have bad allergies and react to everything. What we do: We have a couple of the Holmes or other brand (I forget), $40 air filters around the house - they now make them for $65 with a washable filter, which is much cheaper in the long run. The cheap ones make a huge difference and I found no difference with the more costly ones. Put one in each bedroom, and other room, including the room after they are done working for the night. We saw in the house as it's cold out and it's fine. They also make huge filtering systems for woodworking but we don't have the space. Jet and Sears are the leading brands. Plastic barriers - get the heavier grade plastic and just tape it well to the walls. They make plastic zippers - use TWO for each door or they rip out really easily after a few days, especially with kids running around. Make sure to try to tape it to the floors. We got some at a speciality contractor store, but I got a few more at Home Depot. (about $8 each plus plastic) Cover floors in surrounding area and in demo area if you are not redoing the floor with the big roll of floor/paining/roofing paper - depends on the store where it will be - it looks like red/tan mailing paper. Use tape to seal inbetween cracks - makes much easier so floors don't get dammaged and if you have cracks in the hardwood it doesn't flow to the basement and make the basement dusty. Make sure they clean up every day or you do. It makes it so much easier to keep things clean if you constantly are cleaning vs. waiting and cleaning. (We have tons of tools frequently used in the basement but they look new). Swifters - wet and dry help. The best shop vac I found (HEPA is nice but they are big and $$$). The best one is the Stinger - sometimes you can catch it at half this price at Home Depot. http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100021998 It cleans really well and since the filters are 3 for $5, you are more willing to change more frequently. It is light weight, which helps if you have to lift it high up and it is much more powerful than it looks. We have a fancy Sears brand that rarely gets used anymore as this is my favorite for everything. Also, when you dump it out and change the filter, wash it down and that helps. We've had ours over a year and it's still going strong after lots of frequent use. And, lastly, wash down everything with water every few days and make sure after they demo before they put in the cabinets that they clean as they make dust drilling and most contractors don't worry about that as it's behind the cabinets. We cheated and got some help with only hanging the cabinets and the guy laughed as he and my husband worked and I stood there in between helping with my Stinger making sure every nook was clean. The Zip Walls look cool if you don't have walls to attach plastic to, but they are very $$$ - I think they are about $100 each or something when I looked at them last. Here is a link that might be useful: My favorite tool

Consumer Reports tested several different brands a number of years ago--about the time I wanted to get one (allergies here, too). I was looking at the Sharper Image one--super expensive, supposedly the crud collected on the metal plate, just had to be swiped off. Supposedly really effective, and easy to clean. CR rated that kind at the bottom of the list. According to their test results, for the air filter to be effective, you need to have a fan and air filters involved. So we bought one for about 1/4 the price of the SI, and have been VERY satisfied with it. Turn it on, and in a half hour or so, the air in the room feels and smells like the air does after a summer shower--clean and cool. Makes such a difference. with ours, you have to wash the foam filter, and replace the paper one (looks like the air filter from a Mack Truck--LOL) regularly.