What term refers to the passageway within a chimney for conveying flue gases outside?

The term that refers to the passageway within a chimney for conveying flue gases outside is the flue. The flue is a critical component of a chimney system, designed to safely direct combustion byproducts such as gases, smoke, and other emissions from a fireplace, furnace, or boiler to the outside atmosphere.

Understanding the function of the flue is essential for maintaining a safe and efficient chimney system. It needs to be properly constructed and maintained to prevent issues such as blockages or leaks, which can lead to dangerous situations like chimney fires or carbon monoxide buildup inside the home.

Other terms in the question, such as flashing, corbel, and cricket, refer to different aspects of chimney and roofing design. Flashing is used to prevent water from entering the joints between the chimney and the roof, while a corbel is a support structure that can be part of the chimney design. A cricket is a roof feature designed to divert water around a chimney. Each of these plays a role in the overall integrity and performance of the chimney system but does not specifically refer to the passageway for flue gases.