What characterizes induced draft?

Induced draft is characterized by the use of a fan that pulls air through the furnace. This process creates a negative pressure within the combustion chamber, which helps in drawing flue gases out and facilitates the movement of combustion air into the furnace. It is particularly effective for enhancing combustion efficiency and ensuring that exhaust gases are efficiently removed from the system. By pulling air, it helps maintain the ideal conditions required for the combustion process, allowing for smoother operation and improved safety in heating systems.

Other methods of draft, such as forced draft, involve a fan pushing air into the furnace, but in the case of induced draft, the fan's role is to create a suction effect that enhances airflow through the equipment. This distinction is crucial for understanding the functioning of various types of ventilation and combustion systems in stationary engineering.