The CF40DC larger Premier pressure developing centrifugal fans are suitable for use in kitchens, utility rooms, larger bathrooms & toilets & 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 & safety thermal cut-out protection. An energy efficient DC motor keps running costs & power consumption low. 2, 3 & 5 speed models available Overrun timer, humidistat & pullcord models available Condensation control on CF models Surface or recess mounting Energy efficient DC motor IPX5 rated