Menroz fan brand - made in England CF100S/CF200S model Device performance requirements The fan is designed based on 220 to 240 voltage. Also, the input power of the device is based on 50 Hz, and due to the fact that the device has the ability to work continuously, it can always be connected to the power source. The direction of the air flow should be according to the arrows embedded on the body of the device. This series of fans has a tolerance of 10 to 45. The device does not need to be installed on the ground or on a chassis.