What does an induced draft fan handle?

An induced draft fan is specifically designed to draw flue gases out of the combustion chamber and into the exhaust system. This process ensures that the combustion gases are effectively expelled from the system, maintaining the proper pressure gradient that allows for efficient combustion and preventing backdrafts. By removing these flue gases, the induced draft fan also helps optimize the air-fuel ratio within the combustion chamber, facilitating more complete combustion and improving overall efficiency.

In addition, the induced draft fan contributes to the safety of the system by ensuring that harmful gases are vented outside rather than re-entering the combustion area or the surrounding environment. This role is critical in applications such as boilers and furnaces, where the safe management of combustion byproducts is essential.

Understanding the specific function of an induced draft fan is important in HVAC and combustion system design, where efficiency and safety are prioritized.