ENERGY INFORMATION at High Speed Airflow Electricity Use Airflow Efficiency 5459.0 61.3 89.0 Cubic Feet Per Watts Cubic Ft Per Minute (excludes lights) Minute Per Watt Compare: 49” to 60” ceiling fans have airflow efficiencies ranging from approximately 51 to 176 cubic feet per minute per watt at high speed. Money-Saving Tip: Turn off fan when leaving room.