A 15000 CFM exhaust fan is a type of fan that is designed to move a large volume of air in a short amount of time. It is commonly used in industrial and commercial settings to remove fumes, smoke, dust, and other contaminants from the air. The fan is usually mounted in the ceiling and is connected to a duct system that is used to vent the air outside. The fan works by drawing in air from the room and then pushing it out through the ducts. The CFM rating of the fan indicates the amount of air it can move in a given time period, with 15000 CFM being a relatively high rating. The fan is typically powered by an electric motor and can be controlled with a variable speed controller to adjust the airflow as needed. The fan is an essential component of any ventilation system and is essential for providing a safe and healthy environment.