Electric Arc Furnace is known as EAF. This EAF is with top cover and this cover contains the primary suction point, known as the 4th hole. inside the furnace needs to be extracted thru this hole only but as this is a complete closed furnace the temperature of the fumes extracted are very high so water-cooled ducts are essential. Once the fumes are extracted it has to travel to the gas cooler or heat exchanger in order to cool down the temperature and then to the pulse jet bag filter or bag house to filter the fumes. Once filtered, the gas is discharged to atmosphere thru ID fan and stack or chimney. Outlet emission performance is specified for the process duty and verified under agreed test conditions depending on the pollution control norms at the location. EAFs generally need both primary and secondary FES, dog house type fume extraction system is not possible with this furnace