An exhaust fan is a type of ventilation fan that is used to remove excess heat, moisture, and other pollutants from a room or building. Exhaust fans are typically installed in the ceiling or a wall and are equipped with a duct that vents the air outside. They are commonly used in bathrooms, kitchens, and other areas where moisture and pollutants can build up. Exhaust fans can help to improve indoor air quality, reduce the risk of mold and mildew, and keep a room cool and comfortable. They are also often used to ventilate garages and other spaces where hazardous fumes may be present. There are many different types of exhaust fan Factory available, including ceiling-mounted, wall-mounted, and window-mounted models.

A centrifugal fan is a type of mechanical fan that uses a rotating impeller to move air or other gases. Centrifugal fans are named for the way they work, as the impeller rotates and the air is thrown or "centrifuged" outward. These fans are commonly used for ventilation, air conditioning, and industrial applications where a large volume of air needs to be moved. Centrifugal fans are known for their high airflow and pressure capabilities and are often used in applications where a Custom High-pressure Centrifugal Fans is required. They are typically more efficient than axial fans, but are also larger and more expensive.