| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilating fan device, for allowing always ventilation in optimal ventilation quantity corresponding to an installing house plan, and easily and surely setting this optimal ventilation quantity. SOLUTION: A range hood 1 has the always ventilation function of the whole building together with the local ventilation function, and can vary the setting of ventilation quantity in the always ventilation, and allows optimal always ventilation corresponding to individual buildings. COPYRIGHT: (C)2005,JPO&NCIPI
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