noun
ventilator; ventilation fan
Refers to a mechanical device that circulates air, such as an exhaust fan or a ventilation unit in a building.
工場の屋根に大きな通風機が設置されている。
A large ventilator is installed on the roof of the factory.
Compound of 通風 (つうふう, 'ventilation') and 機 (き, 'machine').