You should REALLY put in a roof safety bar before installing this fan, even though it doesn't say so in the instructions. Just hanging it to the distribution box is too dangerous. It only needs 2 wires, which is nice given that it has multi-speed fan and dimmable light. You can only manipulate it with the remote control. After 36 hours of no noise, mine started to make a clicking noise like a clock and it comes from inside the motor, not from a part I can access.