| 摘要 |
PURPOSE:To make it possible to maintain a main body of a ventilation fan horizontal, by providing a hanging metal fitting on the outer surface of said ventilation fan formed in a box-shape having a fan therein, attaching a weighted string to said hanging metal fitting, thereby keeping the upper and lower part of this string equal in distance to the side of said ventilation fan. CONSTITUTION:Hanging metal fittings 3 are fixed to the upper part on the side of a main body of a ventilation fan 10, said hanging metal fittings 3 being secured with nuts 4 to anchor bolts 2 embedded in the ceiling 1. A weighted string 8 is bound to the hanging metal fitting 3, whereas a straight indicating line 9 is marked in a vertical direction on the side of the main body of the fan 10 facing the string 8. Installation of the main body of the ventilation fan 10 is carried out by adjusting the nuts 4 so that the distance between the string 8 and the upper part of one side of the main body of the ventilation fan 10 comes equal to that between the string and the lower part, while positioning the string 8 to the indicating line 9 marked on said main body 10 to determine the level thereof. |
