| 摘要 |
PROBLEM TO BE SOLVED: To obtain a ventilation fan for a duct that can have a ventilation fan body fixed by easy operation while securing cut-off performance and air tightness.SOLUTION: A ventilation fan 100 for a duct has a body gap 14a formed by providing a body gap plate 13a at a lower edge of a body side plate 11a. A duct connection part 2a is provided with a duct connection part flange 25a at an upper edge of a duct connection plate 21a abutting against the body side plate 11a, and has a duct connection hook hole 26a formed in the duct connection part flange 25a, and also has a duct connection part gap 28a formed by providing a duct connection gap plate 27a at a lower edge of the duct connection plate 21a. The body gap plate 13a enters the duct connection gap 28a, the lower edge of the duct connection plate 21a enters the body gap 14a, and a body hook projection 12 enters a duct connection part hook hole 26a so that a ventilation fan body 1 is fitted to the duct connection part 2a. |
