Explanation: Taiwanese cuisine do lots of frying jobs, it generate smoke from steaming oil. In simple way, people use normal fan for cooling or ventilation to draw out smoke to the outside air. Restraint having larger scale will use range hood but also using homemade filter for lower costs. The big bucket contains a bucket of soapy water, corrugated paper board from carton, sponge to filtrate air from range hood, finally exhaust it into ditch.