| 摘要 |
PROBLEM TO BE SOLVED: To provide good environment improved in the flow of air with outside air flowing indoors even in rainy weather by providing a rain blow-in preventing plate for preventing rain from blowing into a room, and providing the preventing plate with a vent hole that can mount a ventilation quantity adjusting plate. SOLUTION: The vent hole is provided facing a glass face of an existing window, so that the spray of rain hardly enters indoors. When disused, folding through hinges and storing are possible, and the ventilation quantity can also be adjusted by the ventilation quantity adjusting plate.
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