Which component handles flue gases from the combustion chamber?

The component that handles flue gases from the combustion chamber is the induced draft fan. This fan plays a critical role in the combustion process by creating a negative pressure in the combustion chamber. This pressure difference allows for the efficient removal of flue gases produced during combustion.

When the induced draft fan operates, it effectively draws the gases through the heat exchanger and into the exhaust stack, ensuring that combustion products are expelled safely and efficiently from the system. By managing the flow of flue gases, the induced draft fan also contributes to maintaining optimal combustion conditions, which can improve efficiency and reduce emissions.

In the context of the other options, the forced draft fan is primarily responsible for supplying combustion air into the combustion chamber, while the exhaust stack serves to direct the flue gases outside but does not facilitate their movement. The blower motor is typically associated with air supply and circulation rather than handling exhaust gases directly. Thus, the induced draft fan is specifically designed for the critical task of managing flue gas removal, making it the correct answer.