Because the mower is cutting/mulching as you go the suction is extremely powerful. Mine is middle of the road size. 8 inch with 9 hp motor. Some dust involved depending on the debris. When the trailer is full it produces dust out the vent. So you empty and start again. They make a screw drive or hydraulic type lift to assist. If you lower your deck will vacuum more debris. It is trial and error. But the machine works its not one of them smoke and mirror miracle devices as seen on TV buy one get one free plus separate S&H. It is one of the real get what you pay for. I think they have a try and buy. Call them. You will talk to a person and not asked to press one for English.