Ventilation fans are essential tools in maintaining a comfortable and healthy environment, both in residential and industrial settings. These devices are designed to facilitate the circulation of air, ensuring that spaces remain ventilated by removing stale air, controlling humidity, and bringing in fresh air. The use of ventilation fans has become increasingly significant in today's world, where air quality is a growing concern due to environmental factors and human activities. This article explores the different types of ventilation fans, their uses, and the advantages they bring to various environments.