The R3400 fiber-cement saw collects dust very efficiently. A fan in the back of the tool pulls dust out of the blade housing and feeds it through a hose to a fabric filter attached to the top of a drywall bucket. The exhaust air escapes through the filter and the dust passes into the bucket.
The saw takes a 5-inch blade and has a fixed depth-of-cut of 13/16 inches. Here it's being used to gang-cut HardiePlank lap siding.