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QuietCool Energy Saver Whole House Fan QC ES-4700

The QuietCool QC ES-4700 can help reduce A/C related electricity cost, and pays for itself in savings! The QC ES-4700 moves 4,427H/2,050L CFM and is an ideal fan rooms that may feature additional fans in rooms: The QC ES-4700 is very silent and energy efficient! With an extremely reliable ECM Motor, the QC ES-4700 uses only 494H/64L watts. AirFlow: High 4,427 CFM/ Low 2,050 CFM Energy Efficiency: High 494 Watts / Low 64 Watts @ 8.96 / 32.03 CFM/Watt Grille: 16 in x 32 in Attic Venting Required: 6.2 Sq. Ft.