1. Ventilating stack prevents rain, insects, noise, and sand particles from entering the interior during ventilation.

2. Ventilation is不受time, wind direction, or season restrictions, ensuring safe use even when unoccupied indoors or during sleep.

Secure, free from thieves and cross-ventilation.

3. The upward-deflecting air flow pattern ensures that the wind entering the room does not blow directly on people or objects.

4. Compared to window ventilation, it can reduce indoor heat loss, as it does not require power (electric) drive control, hence it is energy-efficient.

Advantages.

5. Due to the scientifically designed structure of the product and the use of high-quality manufacturing materials, no after-sales maintenance is required, along with the door

Window life span.

6. Ensures safety in using doors and windows, as ventilation is not required, thereby enhancing the overall architectural appearance.

Aesthetics.