Solar Attic Extraction Fan is a roof attic ventilation systems that neutralizes the temperature inside your roof/ attic space. It utilizes alternative energy source from the sun which means that there's no cost in operating the attic fan. Aside from that, it reduces the cooling costs for it exhaust hot air from the attic making your air cooling system operates efficiently. Solar Attic Extraction Fan by Green Vent is manufactured by SG Eco Industries Inc.