Manrose COMG300A Extractor Auto, Commercial window fans cover a wide variety of commercial applications such as pubs, restaurants, hotels, offices, shops & factories, They are also suitable for use in public sector areas such as service stations, hospitals, schools & railway stations & 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 & stylish units will blend into the background, Incorporating the latest ventilation technology & stylish design, these high performance extractor fans have an extract rate up to 1021m/hr (281 lts/sec), 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, & blend into any background, The grey commercial sereis does not require as much cleaning as their white counterparts, 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, & blend into any background, The grey commercial sereis does not require as much cleaning as their white counterparts.