ENERGY INFORMATION at High Speed Airflow Electricity Use | Airflow Efficiency 8427.07 | 27.70 | 304.23 Cubic Feet Per Watts Cubic Feat Per Minus (excludes lights) | Minute Por Watt Com para: 49° to 80 ceiling fans have airflow efficiencies raging from approximately 51 to 176 cubic feet per minute per watt at high speed.