| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation pipe joint capable of securing sufficient ventilation performance while restraining projection toward an indoor side.SOLUTION: A flat part 47 is communicated respectively with a lower connection port 51 and an upper connection port 65, by a lower flat connection part 48 flattened gradually from a lower connection port 51 side toward the flat part 47, and an upper flat connection part 57 flattened gradually from an upper connection port 65 side toward the flat part 47. The ventilation pipe joint 11 is restrained from being projected toward a room 14 inside, because the ventilation pipe joint 11 can be installed in a cut-out part 44 or the like of a horizontal member 43. The sufficient ventilation performance is secured by making a ventilation area of a flat pipe line part 68 at least a ventilation area of a lower ventilation pipe 35. |
