ECO-WORTHY this 65W 3000CFM Solar Powered Attic Ventilator Roof Vent Fan is made with corrosion resistant 304 Stainless Steel motor and blades. This provides longevity to the fan and will prevent any rust from forming. It cools your roof and also reduces the load on your air conditioning system, it will cut your cooling costs with low electric power expense. High flow 65W 3000 CFM solar powered attic fan turns on as soon as the sunlight hits the solar panel and turns off at night. If you add the battery to it, it can keep the house cool and ventilated with fresh air circulation all day.