| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust port for combustion gas preventing carbon dioxide and the like contained in combustion gas from being retained in a common area in a multiple dwelling house even when combustion gas exhausted through a secondary heat exchanger flows slowly. SOLUTION: The exhaust port 1 for combustion gas is provided at a heat source machine 2 having a combustion apparatus for heating hot and cold water or a heat medium, and discharge combustion gas produced by the combustion apparatus passing therethrough to the outside. The exhaust port 1 for combustion gas has a cylindrical outer frame 3 penetrating in the axial direction, and one opening is formed as a square opening 5. The square opening 5 is arranged downstream in the flow direction of combustion gas, and its opening area is made smaller than the cross-sectional area of a flow channel upstream of the square opening 5. COPYRIGHT: (C)2011,JPO&INPIT |
