| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation box having easy constructability, allowing a connection change of a different-diameter duct. SOLUTION: This ventilation box is stored inside the rear of a ceiling wall 13. In the ventilation box, side faces of a main body 6 having an opening part 9 in the lower face have duct connection parts 2, 4 having duct connection ports 1, 3 having different diameters connected to a duct A 14 and a duct B15. By releasing fixing means 11 for the duct connection parts 2, 4 equipped in the main body 6 by operation from below the main body 6, the duct connection parts 2, 4 are separated to the inner side of the main body 6. Thereby, the connection change of the different-diameter duct become possible, air courses of two or more directions can be secured, installation of the duct connection pats 2, 4 can be performed from the inside of the main body 6, and construction can be easily performed. COPYRIGHT: (C)2005,JPO&NCIPI
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