The PRF fans have been developed especially for the exhaust of aggressive media. This is the right fan when corrosive gases, contaminated air or other aggressive components are part of the exhaust air. Typical applications are medical facilities, the food-, electrical- or chemical industry. The sintered casing from UV-resistant PE is absolutely waterproof and offers a variety of applications with its connectors from ø125-250 mm. The casing can be easily adjusted through turning it (standard position is LG270, see picture).