The tuyere is used for automatic exhausting of an air-conditioned room with positive pressure. Under normal circumstances, the louver of the tuyere naturally hangs down and isolates the indoor air exchange. When the indoor air pressure is greater than the outdoor air pressure, the air flow blows the louver and exhausts outward. Otherwise, when the indoor air pressure is lower than the outdoor air pressure, the air flow cannot flow into the room, and the air outlet has a one-way check function.

Structure: The blade can be rotated.

Characteristics: When the forward airflow passes, it will automatically open to prevent the airflow from passing backwards.

Specifications: Match the design size.