Acoustically insulated In-line metal bodied high performance centrifugal box fans to convey air or fumes through ducts. - Simple to maintain with easy to open cover. - Casing manufactured from galvanised sheet steel, with 50mm thermal & acoustic insulation. - Maintenance free ball bearing EC motor as standard, providing high efficiency & pressure development. - Wide range of speed control through optional 0 - 10V speed controller (6510004). - Circular or rectangular duct versions available, all with single inlet. - Max air extract temperature up to: 60°C. - IP55 rated electrical connection box. - Motor is IP44 rated. - Suitable for indoor mounting only. - Not suitable for polluted air, aggressive or explosive gases.