Product Name: 30W 14inch Solar Powered Roof Mount Attic Fan (SN2014008) Model NO.: SN2014008 Certification: CE Mounting: Roof Fan Electric Current Type: DC Type: Exhaust Fan Blade Material: Aluminum Alloy Material: metal Item Name: 30W 14inch Solar Powered Roof Mount Attic Fan Air Duct: 14 Inch Air Flow: 860cfm Round Shroud Cover: Host Size: 530x530X250mm DC Motor: Brush or Brushless Model No.: Sn2014008 Trademark: SINOLTECH Transport Package: Color Carton Specification: CE Origin: China Product Description 30W 14inch Solar Powered Roof Mount Attic Fan (SN2014008)30 watt solar panel (415X495X25mm), 14 inch fan blade,Round shroud cover, host size: 530x530X250mmExhaust capacity: 860 CFMLarger power solar panel for stronger venting flow:Ventilator in Round shroud coverFunction Descriptions:Improving air circulation:Taking advantage of the free & clean solar energy, This attic fan will pump out the interior heat & moisture to balance your house temperature, So as to provide a refreshing ventilation and more environmental-friendly surrounding, and to lower down your general power consumption cost.Extending roofing lifespan:Being exposed long to the strong sun, your roofing underlayment may go weak and Even lose efficiency under the very high temperature.This attic fan can help reduce such heat to prolong their lifespan and to help you save certain maintenance or replacement fee.Reducing moisture & harmful mildews:When collided with chilly attic-roof in winter, the interior warm & humid air will condense into water droplets, such saturated humidity might cause dangerous electrical short circuit or create mildews to Harm your plasterboards.An adequate & more active indoor ventilation provided by this attic fan can help remove These moisture contents & harmful elements for you.Preventing ice-dam:In snowy winter, interior warm air could melt those snows at roof to generate droplets falling Down to the eaves.These droplets will then refreeze into ice damming on your roof and arousing dangers, This attic fan can help preventing such unsafe factors through keeping the house dry.Optional service:--Solar battery system backup:--AC/DC power adaptor:--Thermostat: