ENERGY GUIDE Estimated Airflow Yearly Energy Cost 2488 s 1 1 Cubic Feet Per Minute v X l 534 i The higher the airflow, the snore air the fan will move t Airflow Efficiency: 85 Cubic Cost Range of Similar Models (19" 84") Feet Per Minute Per Watt ยข Based on 14 cents per kWh and 6.