Estimated Yearly Energy Cost $15 S | $34) Cost Range of Similar Models (19~ 84 1) = Based on 12 Cents per kWh and 6.4 Hours Use per Day = Your Cost Depends on Ales and Use ยป Energy Use: 55 Watts ENERGY GUIDE Airflow 4,525 Cubic Feet Per Minute The Higher the Airflow, the More Air the Fan Will Move = Airflow Efficiency: 82 Cubic Feet per Minute per Watt .