36 Inch Wall Mount Exhaust Fan Poultry Farm Greenhouse Industrial Ventilating Equipment Big Airflow Fan for SalesA 36-inch industrial extractor fan works to improve indoor air quality by removing heat, humidity, smoke, dust, and fumes from industrial and commercial environments like factories, warehouses, farms, and restaurants. It achieves this by forcing stale air out and creating a large volume of airflow to allow for the entry of fresh, cooler air.