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욕실의 수증기/ 오염된 공기가 거실로 확산되거나 욕실내의 유리에 결로현상이 발생치 않고 원할한 배기가 되도록 일정량의 공기를 강제적으로 배출시키는 시스템입니다. 즉, 배기 닥트의 압력이 높게 걸린다 하여도 휀에서 배기 압력을 보정하여 일정량을 강제 배출시킵니다.
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