The general rule is to have your ceiling fan approximately 8' to 9' above the floor in order to optimize the efficiency of your Hunter fan. Sometimes a downrod (extension pipe) may be required to achieve this. To calculate the downrod length you need, use this simple calculation:
Ceiling height (in feet) minus 9' (includes the fan height) = Downrod length
For example, if your ceiling is 12' high, you will need a 3' downrod to ensure the fan is positioned at the proper height.