"Exhaust Fan" according to the properties of the steam discharge, determining that the type of the fan: This fan is a food factory steam discharge apparatus requires long-term continuous use, and a steam plant food having a certain humidity, high temperature characteristics, when you select fan only select non-rusting material production, high-quality exhaust fan, usually iron rust easily damaged exhaust fan does not fit, do not rust and durable fiberglass exhaust fan exhaust fan, stainless steel exhaust fan.