An exhaust flue (40) includes an exhaust chimney body (43), and an open end multi-hole area (51). The exhaust chimney body (43) is a passage for discharging exhaust gas. The open end multi-hole area (51) is an area in which multiple holes (50) have been opened around the entire circumference of an open end (44) of the exhaust chimney body (43). The exhaust flue (40) is capable of minimizing the release of noises with low-frequency components to the outside by means of a simple construction in which holes (50) are opened in the exhaust chimney body (43).
