Works well with my twenty-five year old 16 gallon shop vac.  On softwood with the dewalt 735 planer, the bucket under the collector fills from one third to one-half before the shop vac is filled; with hardwood more chips end up in the cyclone bucket(two thirds or so) before the shop vac is full.  No dust in the air and when chips start exiting the planer the shop vac is full. Used the Woodstock clear hose and their 4 to 2 1/2" adapter plus some shop vac fittings including plastic end pieces from old vac hoses.