This ventilation fan uses advanced ventilation technology to quickly and efficiently achieve convection of indoor and outdoor air, effectively improving indoor air quality. Its louver design can effectively prevent rainwater and foreign objects from entering, ensuring the normal operation and service life of the equipment. The ventilation fan also has the characteristics of silent operation, which can maintain low noise even when operating at high speed, providing users with a quiet environment. This feature makes the ventilation fan very suitable for use in bedrooms, kitchens, bathrooms and other places that require a quiet environment, without disturbing the user's rest or work. In addition, this ventilation fan is also durable and easy to clean. It is made of high-quality materials, has a sturdy and durable structure, and is easy to clean and maintain, providing users with a convenient use experience. In short, the louver-no-mesh ventilation fan is a well-designed and powerful indoor ventilation equipment that provides users with a fresh and comfortable indoor air environment. It has beautiful appearance, excellent ventilation effect, quiet and stable operation, durability and easy cleaning. It is an ideal choice for home life and office environment.