Due to the requirement of near sterile conditions in clean rooms, air showers are used to decontaminate by blasting dirt and dust particles off personnel entering the place. The pollutants carried by personnel can affect special equipment. Their use can potentially eliminate contamination and in turn prevent loss of important manufacturing, such as expensive batches of pharmaceutical chemicals and semiconductor wafers. Thus, air showers are common in many factories where sterile conditions are needed. Air showers are specialised antechambers which personnel need to pass through before entering clean rooms in order to decontaminate. This is done so by clearing off dust and dirt particles from bodies of clean room personnel to minimize contamination of equipment or products