| 摘要 |
PROBLEM TO BE SOLVED: To provide a comfortable living space by improving a present problem on ventilation essential to a life in a house. SOLUTION: By applying the principle of a tornado, suction parts or ducts on four directions are situated at the lower part of a room required for ventilation. Simultaneously with discharge of air from a ventilation fan, by rotating a flow of air during suction, a rousing similar to tornado is worked and ventilation efficiency is remarkably improved.
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