Minimum Height: The lower edge of a ceiling fan blade must be at least 2.1m (7ft) above the floor to comply with Australian building codes. For low ceilings, if possible select ceilings fans with features to minimise their encroachment into a room. The more air (space) there is above a ceiling fan, the more airflow the fan will be able to produce. We would recommend aiming for at least 30cm or greater of space above your fan to ensure optimal efficiency. For higher ceiling fans, we recommend trying to position your ceiling fan anywhere between 2.4m and 2.7m to ensure optimal performance. Refer to our Ceiling Fan Size Guide for more information on how high to hang your ceiling fan.