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Contact SupplierA Stainless Steel Induced Draft (ID) Fan is a type of fan used primarily in boiler and industrial ventilation systems to extract flue gases from the combustion chamber and discharge them safely through the chimney. The fan creates a negative pressure (draft) inside the furnace, ensuring efficient combustion and safe exhaust of gases. What is an Induced Draft (ID) Fan? An ID fan pulls flue gases out of the boiler or furnace. It is installed downstream of the combustion zone, usually before the stack. Maintains a controlled negative pressure inside the combustion chamber. Helps in removing combustion gases and preventing leakage into the boiler room.