Master Flow ERV4 Power Attic Vent with Thermostat, 480 sq-in Net Free Ventilating Area, 1000 cfm Air, Steel

Pre-wired roof mount attic vent and thermostat control, helps exhaust large amounts of hot and humid air from your attic, helps protect your roofing system and promotes your home's energy efficiency, energy-efficient PSC (permanent-split capacitor), includes internal heavy-duty screen which helps prevent animal infestation.