Extraction is the process of forcibly removing trapped air from a factory shed, creating a vacuum or low pressure zone, which is subsequently neutralised by pulling cold air from the outside and completing the convection cycle. Natural ventilators are also referred to as eco ventilators or eco friendly ventilators.
Depending on their size, roof extractors release a significant amount of the heat and smoke that has accumulated at the roof level. The boiler, steam foundry, forge, heat treatment, and automobile industries are the best places for them.
