AIR SUPPLY/EXHAUST TUBE

PROBLEM TO BE SOLVED: To reduce the resistance to the supply of air and suppress recirculation of the exhaust gas when there is a strong wind by providing in the front side of an exhaust top an air supply hole in the upper part and an exhaust hole in the lower part, inside the exhaust top an exhaust flow downward deflecting plate and a flow-dividing plate, and in the back side of the exhaust top and air passage opening. SOLUTION: An exhaust tube 1, having an exhaust top 3 at the tip, extends beyond the tip of an air supply tube 2. An air supply opening 4 is formed in the rear of the exhaust top 3. In the front plate 5 of the exhaust top 3 a front air supply opening 6 is formed in the upper part and an exhaust opening 7, in the lower part. Inside the exhaust top 3 an exhaust-deflecting plate 8 is provided, which, on the one hand, partitions the inside of the exhaust top 3 into an exhaust passageway 9 and an air supply passageway 10 and, on the other hand, turns the exhaust passageway 9 slantingly downward and brings this passageway to the exhaust opening 7. ON the upstream side of the exhaust opening 7a flow-dividing plate 11 is provided, which has the shape of a letter V in section and divides the exhaust to the left and the right. In the back plate 12 of the exhaust top 3 an air passage opening 13 is provided at a position opposed to the front air supply opening 6. The exhaust tube 1 and the air supply tube 2 are passed through an outer wall 50 of a house and connected to a combustion apparatus installed indoors.