The CF40DC larger Premier pressure developing centrifugal fans are suitable for use in kitchens, utility rooms, larger bathrooms and toilets and individual offices. Features an integral humidistat for condensation control. Suitable for surface or recess mounting using accessories provided. Features external rotor motors with integral balanced impellers, sealed for life maintenance free bearings and safety thermal cut-out protection. An energy efficient DC motor keps running costs and power consumption low. 2, 3 and 5 speed models available Overrun timer, humidistat and pullcord models available Condensation control on CF models Surface or recess mounting Energy efficient DC motor IPX5 rated