Vertical discharge roof fans with energy saving EC motors to extract air or fumes directly or through ducts. - Ideal for commercial & industrial applications such as offices, factories, warehouses, shops, gyms, swimming pools, bars & restaurants. - Housing manufactured from galvanized steel, can be manufactured in aluminium as an option. - Maintenance free ball bearing EC motor as standard, providing high efficiency, higher pressure development & low noise. - Motorised impeller is protected by an integral mesh grille which protects against external objects that could cause damage. - Easy to clean backward curved impeller. - VSVI models have 50mm thick mineral wool providing superior sound insulation. - Wide range of speed control through optional 0 - 10V speed controller (6510004). - Max air extract temperature up to: 60°C. (6500258 & 6500265 up to 40°C). - IP55 rated electrical connection box. - Motor is IP54 rated. - Not suitable for polluted air, aggressive or explosive gases.