A 36" extractor fan is a large, powerful fan that ventilates enclosed spaces by removing un- wanted air, heat, dust smoke, and moisture, and replacing it with fresh air. It achieves this by creat- ing negative air pressure, drawing con- taminated air out of the building and al- lowing outside air to come in through natural ventilation or intake vents These fans are commonly used in in- dustrial settings, agricultural buildings like barns and greenhouses, ware- houses, and large workshops to im- prove air quality, regulate temperature. control humidity, and prevent odor buildup