Shop Vac dust collectors are not good for multiple machines or large volume woodworking machines such as planers.For a large woodworking shop you need a REAL dust collection system-4,6 in hoses ,adaptors with gates at each tool.The gates allow you to shut off airflow to tools not being used.Real shop dust collectors don't have the high suction a SV has-but VERY high CFM-and the ability to pass large shavings without clogging.The SV is a great shop vacuum for cleaning the shop-but not as a dust collector-unless you have ONE machine like a table saw or sander.And use the bag in the SV machine-the pleated filter will clog QUICKLY with sanding-sawdust.Speak from experience.And most shop dust collectors are actually "direct air" the debris passes thru a VERY large cast metal or welded steel fan.The fan is powered by a 1.5 Hp-7Hp 3450 RPM induction motor blowing into a filter cyclone system or bag.Clean arir dust collectors the material goes into the cyclone before the fan-the fan passes the "fines" into a filter,or bag.