Attic Ventilator, Thermostatically Controlled 18 In Gable Mount with Shutter & Guard, Voltage 120, 60 Hz, 1/15 HP, 1.3 Amps, 1075 RPM, 1860 CFM @ 0000-In SP, 850 CFM @ 0125-In SP, Max Attic Area 2300 Sq Ft, Free Air Intake Required 5.5 Sq Ft, Opening...