Dust Control

We make lots and lots of dust when we sand a floor. The trick is in controlling it and trapping it before it gets all over your house.
We use a vacuum system on all of our sanding machines. Dust containment is primarily achieved via a portable, central vacuum system. However, we use individual vacuums on some of the small sanders. We capture somewhere between 90 and 95 percent of our dust.  Having said all this, it is important to note that the operative word when someone says dustless is "less." We generate a huge amount of very fine dust when we sand floors.  We will get 1-2 fifty gallon bags of dust from an average floor.  The dust that we cannot capture is equivalent to what one would expect from the accumulation of a month's worth of normal house dust.
Although, we have a wonderful vacuum system we still go "old school" and seal our work area as much as we can with tape and plastic. We try to keep any dust we don't contain confined to our work area. If we can, we shut down the air conditioning or heat so we don't have dust getting into the return ducts.  The light dust dissipates rapidly so we are able to turn the air units back on when we leave your home for the day.