Grilles have many advantages, including:

1. Ventilation performance: Grilles can provide good ventilation, allowing air to flow and preventing the accumulation of hot air and odors indoors.

2. Safety: Grilles can serve as protective measures to prevent small animals, children, or other unwelcome individuals from entering indoor spaces.

3. Light Transparency: Grilles allow natural light to pass through, providing a bright indoor environment and reducing eye fatigue.

4. Visual effects: Grilles can add beauty to buildings and provide unique exterior design.

5. Easy to maintain: Grilles are usually made of durable materials that are easy to clean and maintain.

6. Intrusion prevention: Grilles can serve as a physical barrier to prevent intruders from entering buildings.

Overall, the advantages of grilles include good ventilation performance, safety, light transmission, visual effects, easy maintenance, and intrusion prevention.