VENTILATION DEVICE FOR A STRUCTURE

摘要

A ventilation system for building is provided to ventilate the interior air when rotating in one direction and block the vent dually when rotating the opposite direction, thereby improving heat efficiency. A ventilation system for building comprises a frame(20) in which an intake(22) is formed on the front side and a vent(24) is formed on the rear side to deliver the air flowing in through the intake to the interior, and a control unit(30) which is attached to the vent. The control unit includes shields(32) mounted on the either side symmetrically, filters(36) mounted on the space formed between the shields, a handle which is connected to the shield on one or either side and operates the shield when rotated, and an operating bar(38) partitioning off the filters mounted between the shields.