Manrose COMG230A Extractor Auto,Commercial window fans cover a wide variety of commercial applications such as pubs, restaurants, hotels, offices, shops and factories. They are also suitable for use in public sector areas such as service stations, hospitals, schools and railway stations and are designed for heavy usage,The stylish internal louvre incorporates the internal shutters which are built into the grille so the internal profile of the fan is less obtrusive. These elegant and stylish units will blend into the background,Incorporating the latest ventilation technology and stylish design, these high performance extractor fans have an extract rate up to 668m/hr (185 lts/sec),Tested to comply with the 2006 Building Regulations on Ventilation (F1),Another feature of the range is that the external grille is moulded in a dark grey so it will not be too obtrusive on the window line, and blend into any background,The grey commercial sereis does not require as much cleaning as their white counterparts.