Estimated Airflow Yearly Energy Cost 3,253 SO Cubic Feel Per Minute wv «Thr higher the'airflow, the 3 34 » Airflow Efficiency: 98 Ruble Cost Range of Similar Models 18" 84%) Feet Per Minute Per Walt + Based on 12 cents per kW hand 6.4 hours use per day » Your cost depends on rates and use «Energy Use: 33 Walls All estimates based on please use, excluding lights fle.