What is a primary function of an induced draft fan in a boiler system?

In a boiler system, an induced draft fan is primarily responsible for creating a negative pressure in the combustion area. This function is crucial for effectively drawing flue gases through the system, ensuring they are properly vented outside the boiler. The negative pressure helps to maintain the necessary airflow for combustion, supports efficient fuel burning, and aids in the removal of combustion products from the combustion chamber.

A properly functioning induced draft fan not only improves combustion efficiency but also enhances safety by preventing the accumulation of harmful gases within the boiler. This pressure difference also aids in optimizing the overall performance of the boiler system, which is essential for maintaining desired operating conditions and efficiency. The induced draft fan thus plays a vital role in ensuring effective combustion and safe operations within the boiler system.