52" Irene-5 Airflow Cubic Feet per Minute E"E RG GUIDE ' I t Estimated Airflow TS g e Yearly Energy Cost Down rod 3,908 $ 6 Cubic Feet Per Minute v High 5,783 Cost Range of Similar Models (1872849 Set Per Minnie Per Watt LOW g = Based on 12 cents per kWD and 8.