The Fume Eliminator (also called a Smoke Eater) is designed to be carried to the working area. Connected to a welding torch or to an extraction nozzle, the FE unit extracts the fume directly at source. FE 840 has a manual start/stop function while the FE 841 has an automatic start/stop function, which starts the unit as soon as the welding begins. Power Voltage (V) 230.