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Good point of the non tapered Infinity cyclones-I used to work with woodshop dust collector cyclones-and they have to be tapered to work.I don't see how Infinity cyclones can work.However all cyclones need a filter after them to catch the very "fines"The filter that is in the Dyson does this.In shop dust collectors-a baghouse,bag filter-or very large pleated filter catches the fines.One of the tasks I had was emptying the unit-A large trash barrel fits under the main cyclone-and that catches large shavings,wood blocks,etc.-the fines one would catch sanding dust and very fine sawdust.You pulled a lever to "shake" the fines bag to get the dust to fall into another trash barrel.the single cyclone was made from sheet metal and stood about 10 ft tall.The suction motor blower was on top-was 7 HP.It had to collect the wood dust from several woodworking machines-from table saws to sanders and to a 36" surface planer-that planer generated most of the debris.